Re: [1/4] standardize bit waiting data type

Re: [1/4] standardize bit waiting data type

[Martin Wilck]

William Lee Irwin III wrote:

> @@ -153,15 +119,13 @@
>  void __wait_on_buffer(struct buffer_head * bh)
>  {
>  	wait_queue_head_t *wqh = bh_waitq_head(bh);
> -	DEFINE_BH_WAIT(wait, bh);
> +	DEFINE_WAIT_BIT(wait, &bh->b_state, BH_Lock);
>  
> -	do {
> -		prepare_to_wait(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
> -		if (buffer_locked(bh)) {
> -			sync_buffer(bh);
> -			io_schedule();
> -		}
> -	} while (buffer_locked(bh));
> +	prepare_to_wait(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
> +	if (buffer_locked(bh)) {
> +		sync_buffer(bh);
> +		io_schedule();
> +	}
>  	finish_wait(wqh, &wait.wait);
>  }

Why don't you need a do..while loop any more ?

There is also no loop in __wait_on_bit() in the completed patch series.

Cheers
Martin

Re: [1/4] standardize bit waiting data type

[William Lee Irwin III]

William Lee Irwin III wrote:
>>+	prepare_to_wait(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
>>+	if (buffer_locked(bh)) {
>>+		sync_buffer(bh);
>>+		io_schedule();
>>+	}
>> 	finish_wait(wqh, &wait.wait);
>> }

On Fri, Sep 03, 2004 at 11:53:55AM +0200, Martin Wilck wrote:
> Why don't you need a do..while loop any more ?
> There is also no loop in __wait_on_bit() in the completed patch series.

Part of the point of filtered waitqueues is to reestablish wake-one
semantics. This means two things:
(a) those waiting merely for a bit to clear with no need to set it,
	i.e. all they want is to know a transition from set to
	clear occurred, are only woken once and don't need to loop
	waking and sleeping
(b) Of those tasks waiting for a bit to clear so they can set it
	exclusively, only one needs to be woken, and after the first
	is woken, it promises to clear the bit again, so there is no
	need to wake more tasks.

These two aspects of wake-one semantics give it highly attractive
performance characteristics.


-- wli

Re: [1/4] standardize bit waiting data type

[William Lee Irwin III]

On Fri, Sep 03, 2004 at 11:53:55AM +0200, Martin Wilck wrote:
>> Why don't you need a do..while loop any more ?
>> There is also no loop in __wait_on_bit() in the completed patch series.

On Fri, Sep 03, 2004 at 02:42:47AM -0700, William Lee Irwin III wrote:
> Part of the point of filtered waitqueues is to reestablish wake-one
> semantics. This means two things:
> (a) those waiting merely for a bit to clear with no need to set it,
> 	i.e. all they want is to know a transition from set to
> 	clear occurred, are only woken once and don't need to loop
> 	waking and sleeping
> (b) Of those tasks waiting for a bit to clear so they can set it
> 	exclusively, only one needs to be woken, and after the first
> 	is woken, it promises to clear the bit again, so there is no
> 	need to wake more tasks.

Also, (a) still works in the presence of signals with interruptible
waits (which the VM and VFS do not now use); the sleeping function is
required to return -EINTR or some other nonzero value to indicate
abnormal termination, which in turn must be checked by the caller.


-- wli

2.6.9-rc1-mm1

[Andrew Morton]

ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc1/2.6.9-rc1-mm1/


- nicksched is still here.  There has been very little feedback, except that
  it seems to slow some workloads on NUMA.

- Added a __must_check to the x86 copy_*_user functions.  This means that
  with a sufficiently recent gcc, all unchecked copy_*_user() calls will
  generate a warning.

  I fixed a few things, but binfmt_elf.c is a mess.

  It's not clear how to apply the same debug check to put_user() and
  friends.




Changes since 2.6.8.1-mm4:


 linus.patch
 bk-acpi.patch
 bk-agpgart.patch
 bk-alsa.patch
 bk-cifs.patch
 bk-dma-declare-coherent-memory.patch
 bk-drm.patch
 bk-ia64.patch
 bk-ieee1394.patch
 bk-input.patch
 bk-jfs.patch
 bk-pnp.patch
 bk-power.patch
 bk-scsi.patch
 bk-usb.patch

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-cciss-updates-id-change-for-v100-controller-for-268-rc3-fix.patch
-cciss-updates-pdev-intr-fix-for-268-rc3.patch
-cciss-update-7-read_ahead-bumped-to-1024.patch
-cciss-update-8-maintainers-update-for-hp.patch
-cciss-congig-dependency-fix.patch
-rmaplock-1-5-pageanon-in-mapping.patch
-rmaplock-2-5-kill-page_map_lock.patch
-rmaplock-3-5-slab_destroy_by_rcu.patch
-rmaplock-4-5-mm-lock-ordering.patch
-rmaplock-5-5-swapoff-use-anon_vma.patch
-x86-bitopsh-commentary-on-instruction-reordering.patch
-clarify-get_task_mm-mmgrab.patch
-simple-fs-stop-ve-dentries.patch
-8139too-rx-fifo-overflow-recovery.patch
-8139too-be-sure-to-progress-durin-rtl8139_rx.patch
-via-velocity-more-inetaddr_notifier-fix.patch
-vm-tune-writeback.patch
-alloc-pages-watermark-fixes.patch
-alloc-pages-priority-tuning.patch
-fix-d_path-errors.patch
-emu10k1-maintainer-update.patch
-ptr_ok-cleanup.patch
-mpage_readpage-unable-to-handle-bigger-requests.patch
-improve-speed-of-freeing-bootmem.patch
-consolidate-clone_idletask-masking.patch
-kill-clone_idletask.patch
-oprofile-xscale-fixes-for-pxa270-xscale2.patch
-remove-magic-1-from-shm-segment-count.patch
-via-rhine-suspend-resume-support.patch
-via-rhine-de-isolate-phy.patch
-via-rhine-small-fixes.patch
-fix-i386-x86_64-idle-routine-selection.patch
-fix-i386-x86_64-idle-routine-selection-comment-updates.patch
-#fix-some-signed-ints-that-should-be-unsigned.patch
-x86-pae-swapspace-expansion.patch
-executable-hugetlb-pages.patch
-md-fix-problems-with-checksum-handling-in-md-superblocks.patch
-sk98lin-no-procfs-build-fix.patch
-fix-net-hamradio-dmascc-with-gcc-34-fwd.patch
-fix-warnings-in-es7000.patch
-reduce-aacraid-namespace-pollution.patch
-reduce-bkl-usage-in-do_coredump.patch
-apm_infodisabled-fix.patch
-267-rc3-mm2-inlining-failures.patch
-high2lowuid-warning-fix.patch
-new-cpu_has_-flags.patch
-get_nodes-mask-miscalculation.patch
-use-posix-headers-in-sumversionc.patch
-x86-esr-print-quietness.patch
-intel8x0c-sound-use-pci_vendor_id-rather-than-bare-numbers.patch
-fix-rxrpc-compile-errors-with-sysctl=n.patch
-ix86x86_64-cpu-features.patch
-libfs-move-transaction-file-ops-into-libfs.patch
-dont-print-per-cpu-delay-loop-calibration.patch
-fix-sn_console-for-config_smp=n.patch
-via-velocity-wrong-module-name-in-kconfig-documentation.patch
-reduce-ptyc-ifdef-clutter.patch
-bug-on-inconsistant-dcache-tree-in-may_delete.patch
-remove-dead-config_kernel_elf-kconfig-entry.patch
-fix-some-comments-about-epoch-in-arch-alpha-kernel-timec.patch
-small-simplification-for-two-security-dependencies.patch
-configurable-selinux-bootparam-value.patch
-fix-typos-in-security-securityc.patch
-use-simple_read_from_buffer-in-selinuxfs.patch
-use-simple_read_from_buffer-in-proc_info_read-and-proc_pid_attr_read.patch
-fw-new-linux-268-rc4-mm1-ipv6-in-ipv6-undefined-references.patch
-ttys0-vs-ttys00-confusion.patch
-reduce-size-of-struct-buffer_head-on-64bit.patch
-reduce-size-of-struct-dentry-on-64bit.patch
-remove-cacheline-alignment-from-inode-slabs.patch
-read-cpumasks-every-time-when-exporting-through-sysfs.patch
-centralize-i386-constants.patch
-fix-permissions-on-module_param-usage.patch
-module-parameters-in-sysfs-for-built-in-modules.patch
-remove-module_parm-from-main-part-of-kernel.patch
-filemap_index_overflow.patch
-synclinkc-replace-syncppp-with-genhdlc.patch
-synclinkmpc-replace-syncppp-with-genhdlc.patch
-synclink_csc-replace-syncppp-with-genhdlc.patch
-reiserfs-xattr-acl-fixes.patch
-files-up-to-4-gb-support-for-iso9660-filesystems.patch
-selinux-add-null-device-node-to-selinuxfs-remove-open_devnull.patch
-selinux-revalidate-access-to-controlling-tty.patch
-selinux-defer-inode-security-initialization.patch
-selinux-fix-name_bind-audit.patch
-reduce-selinux-kernel-memory-use-on-64-bit-systems.patch
-remove-last-suser-call-drivers-char-rocketc.patch
-add-pci-dependencies-to-drivers-media-dvb-ttpci-kconfig.patch
-compat_do_execve-fix.patch
-fix-4k-ext2fs-support-in-26-initrds.patch
-coding-style-do_thisab-vs-do_thisa-b.patch
-typo-in-laptop_modetxt.patch
-tainted-sysctl-permissions-fix.patch
-s390-core-changes.patch
-s390-zfcp-host-adapter.patch
-s390-lcs-network-driver.patch
-bio_uncopy_user-mem-leak.patch
-bio_uncopy_user-mem-leak-fix.patch
-notify_parent-cleanup.patch
-remove-notify_parent.patch
-i386-unbusy-tss-cleanup.patch
-proc-pid-cmdline-truncates-arguments-early.patch
-update-aci-mixer-driver-webpage.patch
-remove-read-only-immutable-checks-from-fat_truncate.patch
-ext3-documentation.patch
-ad1816-sound-driver-web-page-and-email-address.patch
-firmware-loader-is-orphan.patch
-remove-struct-bus_type-add.patch
-file_ra_state_init-speedup.patch
-dev-random-fix-latency-in-rekeying-sequence-number.patch
-dev-random-add-pool-name-to-entropy-store.patch
-dev-random-use-separate-entropy-store-for-dev-urandom.patch
-dev-random-remove-rndgetpool-ioctl.patch
-fix-bad-url-in-bsd-acct-help-entry.patch
-dothan-speedstep-fix.patch
-shows-active-inactive-on-per-node-meminfo.patch
-shows-active-inactive-on-per-node-meminfo-speedup.patch
-minix-nblocks-retval-fix.patch
-usercopy-return-EFAULT.patch
-intel8x0-latency-fix.patch
-inode-time-update-funnies-in-ncpfs.patch
-fix-oprofile-events-with-zero-event-values.patch
-pci-driver-function-documentation-fix.patch
-vlan-missing-kconfig-help.patch
-remove-obsolete-htab-reclaim-in-documentation-sysctl-kerneltxt.patch
-remove-obsolete-zero-paged-in-documentation-sysctl-kerneltxt.patch
-legousbtower-module_param-fix.patch

 Merged

-context-switching-overhead-in-x-ioport.patch

 Dropped - still in progress.

+auth_unix_lookup-oops-fix.patch
+auth_unix_lookup-oops-fix-fix.patch

 NFS fixes

+fix-show_mem-on-discontig-machines.patch

 show_mem() fix

+fix-sysrq-support-in-sn_consolec.patch

 SN console sysrq fix

+request_region-for-winbond-and-smsc-parport-drivers.patch

 resource allocation fix

+md-fix-problems-with-checksum-handling-in-md-superblocks.patch

 MD checksumming fix (rejected by Linus.  Placeholder)

+scheduler-profiling.patch
+consolidate-prof_cpu_mask.patch
+introduce-profile_pc.patch
+consolidate-hit-count-increments-in-profile_tick.patch
+move-profile_operations.patch
+make-private-profile-state-static.patch
+make-prof_buffer-atomic_t.patch
+remove-iseries-profiling.patch

 Updated profiling patch series

+reduce-size-of-struct-inode-on-64bit.patch

 Pack inodes better.

+ppc32-refactor-common-book-e-exception-handling-macros.patch
+ppc64-clean-up-unused-macro.patch

 ppc fixes

+lockmeter-for-x86_64.patch

 Implement lockmeter on x86_64

+make-perfctr_virtual-default-in-kconfig-match-recommendation.patch

 perfctr Kconfig fix

+linux-2.6.8.1-49-rpc_workqueue.patch
+linux-2.6.8.1-50-rpc_queue_lock.patch

 NFS updates

+add-some-key-management-specific-error-codes.patch

 Add new errno codes for the key management stuff

+mostly-remove-module_parm.patch

 module_parm() removals

+assign_irq_vector-section-fix.patch
+find_isa_irq_pin-should-not-be-__init.patch

 Some functions can no longer be in __init with kexec

-kexec-i8259-sysfsx86_64.patch
-kexec-x86_64-i8259-fixes.patch

 These were unneeded

+kexec-i8259-shutdown-x86_64.patch

 Implement 8259 shutdown handlers on x86_64

+cpusets-config_cpusets-depends-on-smp.patch
+cpusets-tasks-file-simplify-format-fixes.patch
+cpusets-simplify-memory-generation.patch

 cpusets stuff

+reiser4-prefetch-warning-fix.patch
+reiser4-mode-fix.patch
+reiser4-get_context_ok-warning-fixes.patch

 reiser4 fixlets

+split-timer-resources.patch

 timer reosurce allocation fix

+reduce-casting-in-sysenterc.patch
+cast-page_offset-math-to-void-in-early-printk.patch
+call-virt_to_page-with-void-not-ul.patch
+vmalloc_fault-cleanup.patch
+dont-align-virt_to_page-args.patch

 cleanups

+include-asm-pageh-for-virt_to_page.patch

 build fix

+task_vsize-locking-cleanup.patch
+task_vsize-locking-cleanup-warning-fix.patch
+o1-proc_pid_statm.patch
+o1-proc_pid_statm-fix.patch
+task-statm-no-procfs-fix.patch
+task-statm-reserved-fix.patch
+task-statm-dontcopy-fix.patch

 Various speedups and fixups for /proc/pid/statm and related areas

+r8169-add-ethtool_opsget_regs_len-get_regs.patch
+r8169-per-device-receive-buffer-size.patch
+r8169-code-cleanup.patch
+r8169-enable-mwi.patch
+r8169-bump-version-number.patch
+r8169-sync-the-names-of-a-few-bits-with-the-8139cp-driver.patch
+r8169-comment-a-gcc-295x-bug.patch
+r8169-tx-checksum-offload.patch
+r8169-advertise-dma-to-high-memory.patch
+r8169-rx-checksum-support.patch
+r8169-vlan-support.patch

 net driver updates

+sane-mlock_limit.patch

 Make the default non-priv mlock limit sensible on larger PAGE_SIZE

+lanana-maintainer-devicestxt-patch-1-2.patch

 LANANA has a new owner

+lanana-maintainer-devicestxt-2.patch

 sync up devices.txt

+netmos-9805-parport-interface.patch

 parport driver device support

+s390-lcs-network-driver.patch
+s390-common-i-o-layer.patch
+s390-sclp-driver-changes.patch
+s390-qeth-network-driver.patch

 s390 udpates

+269-rc1-ifdef-fixes-for-drivers-isdn-hifax.patch
+269-rc1-ifdef-cleanup-for-sh64.patch
+269-rc1-ifdef-cleanup-for-cris-port.patch
+269-rc1-ifdef-cleanup-for-ppc.patch
+269-rc1-ifdef-cleanups-in-drivers-net.patch
+make-oom-killer-points-unsigned-long.patch

 cleanups

+dvb-pci_enable_device-fix.patch

 Fix a dvb driver's pci handling

+copying-unaligned-data-across-user-kernel-boundary.patch

 Fix compat-mode directory copying

+re-fix-pagecache-reading-off-by-one.patch
+re-fix-pagecache-reading-off-by-one-cleanup.patch

 Fix the off-by-one in the pagecache read() function again

+waitqueue_debug-crapectomy.patch

 cleanup

+ftape-support-for-x86_64.patch

 Add ftape support for x86_64

+keep-sparc32-config-consistent.patch

 sparc32 Kconfig fix

+fix-typo-in-bw2c.patch

 Fix some typo

+interrupt-is-enabled-before-it-should-be-when-kernel-is-booted.patch

 Avoid possible early-boot lockups

+hvcs-hotplug-fixes.patch

 Fix HVCS driver

+amiga-partition-reading-fix.patch

 Fix parsing of Amiga partition tables

+problem-with-sis900-unknown-phy.patch

 sis900 fix

+kallsyms-data-size-reduction--lookup-speedup.patch

 Use smarter searching and sorting to speed up /proc/kallsyms a lot

+prevent-memory-leak-in-devpts.patch

 dentry leak fix

+revert-ioc_eth3-pci_enable_device-changes.patch
+fix-hp100c-for-pci_enable_device-changes.patch

 Fix these drivers for recent ill-advised PCI API updates

+x86_64-vs-select-fix.patch

 Fix a symbol clash

+must_check-copy_to_user.patch

 Add __must_check to x86 copy_*_user() functions

+copy_to_user-checking.patch
+sym_requeue_awaiting_cmds-uninit-var-fix.patch
+de4x5-idiocy-fix.patch

 Fix some fallout from the above



number of patches in -mm: 310
number of changesets in external trees: 648
number of patches in -mm only: 296
total patches: 944




All patches:


linus.patch

auth_unix_lookup-oops-fix.patch
  auth_unix_lookup() oops fix

auth_unix_lookup-oops-fix-fix.patch
  auth_unix_lookup-oops-fix fix

fix-show_mem-on-discontig-machines.patch
  fix show_mem on discontig machines

fix-sysrq-support-in-sn_consolec.patch
  fix sysrq support in sn_console.c

request_region-for-winbond-and-smsc-parport-drivers.patch
  request_region for winbond and smsc parport drivers

md-fix-problems-with-checksum-handling-in-md-superblocks.patch
  md: fix problems with checksum handling in MD superblocks.

sysfs-backing-store-prepare-file_operations.patch
  sysfs backing store - prepare sysfs_file_operations helpers

sysfs-backing-store-prepare-file_operations-fix.patch
  fix oops with firmware loading

sysfs-backing-store-add-sysfs_dirent.patch
  sysfs backing store - add sysfs_direct structure

sysfs-backing-store-use-sysfs_dirent-tree-in-removal.patch
  sysfs backing store: use sysfs_dirent based tree in file removal

sysfs-backing-store-use-sysfs_dirent-tree-in-dir-file_operations.patch
  sysfs backing store: use sysfs_dirent based tree in dir file operations

sysfs-backing-store-stop-pinning-dentries-inodes-for-leaves.patch
  sysfs backing store: stop pinning dentries/inodes for leaf entries

scheduler-profiling.patch
  schedule profileing

consolidate-prof_cpu_mask.patch
  consolidate prof_cpu_mask

introduce-profile_pc.patch
  introduce profile_pc()

consolidate-hit-count-increments-in-profile_tick.patch
  consolidate hit count increments in profile_tick()

move-profile_operations.patch
  move profile_operations

make-private-profile-state-static.patch
  make private profile state static

make-prof_buffer-atomic_t.patch
  make prof_buffer atomic_t

remove-iseries-profiling.patch
  ppc64: remove iseries profiling

bk-acpi.patch

bk-agpgart.patch

bk-alsa.patch

bk-cifs.patch

bk-dma-declare-coherent-memory.patch

bk-drm.patch

bk-ia64.patch

bk-ieee1394.patch

bk-input.patch

bk-jfs.patch

bk-pnp.patch

bk-power.patch

bk-scsi.patch

bk-usb.patch

mm.patch
  add -mmN to EXTRAVERSION

mm-swsusp-make-sure-we-do-not-return-to-userspace-where-image-is-on-disk.patch
  -mm swsusp: make sure we do not return to userspace where image is on disk

mm-swsusp-copy_page-is-harmfull.patch
  -mm swsusp: copy_page is harmfull

swsusp-fix-highmem.patch
  swsusp: fix highmem

swsusp-do-not-disable-platform-swsusp-because-s4bios-is-available.patch
  swsusp: do not disable platform swsusp because S4bios is available

swsusp-fix-default-powerdown-mode.patch
  swsusp: fix default powerdown mode

mark-old-power-managment-as-deprecated-and-clean-it-up.patch
  Mark old power managment as deprecated and clean it up

use-global-system_state-to-avoid-system-state-confusion.patch
  Use global system_state to avoid system-state confusion

sound-control-build-fix.patch
  sound/core/control.c build fix

ipr-build-fix.patch
  ipr.c build fix

megaraid-build-fix.patch
  [un]register_ioctl32_conversion() stubs

i386_exception_notifiers.patch
  i386 exceptions notifier for kprobes

kprobes-base.patch
  kprobes base patch

kprobes-unset-fix.patch
  kprobes: fix things when CONFIG_KPROBES is unset

kprobes-func-args.patch
  Jumper Probes to provide function arguments

kprobes-build-fix.patch
  kprobes build fix

network-packet-tracer-module-using-kprobes-interface.patch
  Network packet tracer module using kprobes interface.

kgdb-ga.patch
  kgdb stub for ia32 (George Anzinger's one)
  kgdbL warning fix
  kgdb buffer overflow fix
  kgdbL warning fix
  kgdb: CONFIG_DEBUG_INFO fix
  x86_64 fixes
  correct kgdb.txt Documentation link (against  2.6.1-rc1-mm2)
  kgdb: fix for recent gcc
  kgdb warning fixes
  THREAD_SIZE fixes for kgdb
  Fix stack overflow test for non-8k stacks
  kgdb-ga.patch fix for i386 single-step into sysenter
  fix TRAP_BAD_SYSCALL_EXITS on i386
  add TRAP_BAD_SYSCALL_EXITS config for i386

kgdb-is-incompatible-with-kprobes.patch
  kgdb-is-incompatible-with-kprobes

kgdboe-netpoll.patch
  kgdb-over-ethernet via netpoll
  kgdboe: fix configuration of MAC address

kgdb-x86_64-support.patch
  kgdb-x86_64-support.patch for 2.6.2-rc1-mm3
  kgdb-x86_64-warning-fixes

kgdb-ia64-support.patch
  IA64 kgdb support
  ia64 kgdb repair and cleanup
  ia64 kgdb fix

kgdb-ia64-fixes.patch
  kgdb: ia64 fixes

reduce-size-of-struct-inode-on-64bit.patch
  reduce size of struct inode on 64bit

make-tree_lock-an-rwlock.patch
  make mapping->tree_lock an rwlock

must-fix.patch
  must fix lists update
  must fix list update
  mustfix update
  must-fix update
  mustfix lists

ppc32-refactor-common-book-e-exception-handling-macros.patch
  ppc32: refactor common Book-E exception handling macros

ppc64-clean-up-unused-macro.patch
  ppc64: clean up unused macro

ppc64-reloc_hide.patch

invalidate_inodes-speedup.patch
  invalidate_inodes speedup
  more invalidate_inodes speedup fixes

dev-mem-restriction-patch.patch
  /dev/mem restriction patch

get_user_pages-handle-VM_IO.patch
  fix get_user_pages() against mappings of /dev/mem

pid_max-fix.patch
  Bug when setting pid_max > 32k

jbd-remove-livelock-avoidance.patch
  JBD: remove livelock avoidance code in journal_dirty_data()

journal_add_journal_head-debug.patch
  journal_add_journal_head-debug

list_del-debug.patch
  list_del debug check

lockmeter.patch
  lockmeter
  ia64 CONFIG_LOCKMETER fix

lockmeter-build-fix.patch
  lockmeter-build-fix

lockmeter-for-x86_64.patch
  lockmeter for x86_64

unplug-can-sleep.patch
  unplug functions can sleep

firestream-warnings.patch
  firestream warnings

ext3_rsv_cleanup.patch
  ext3 block reservation patch set -- ext3 preallocation cleanup

ext3_rsv_base.patch
  ext3 block reservation patch set -- ext3 block reservation
  ext3 reservations: fix performance regression
  ext3 block reservation patch set -- mount and ioctl feature
  ext3 block reservation patch set -- dynamically increase reservation window
  ext3 reservation ifdef cleanup patch
  ext3 reservation max window size check patch
  ext3 reservation file ioctl fix

ext3-reservation-default-on.patch
  ext3 reservation: default to on

ext3-lazy-discard-reservation-window-patch.patch
  ext3 lazy discard reservation window patch
  ext3 discard reservation in last iput fix patch
  Fix lazy reservation discard
  ext3 reservations: bad_inode fix
  ext3 reservation discard race fix

ipr-ppc64-depends.patch
  Make ipr.c require ppc

tty_io-hangup-locking.patch
  tty_io.c hangup locking

perfctr-core.patch
  From: Mikael Pettersson <mikpe@csd.uu.se>
  Subject: [PATCH][1/6] perfctr-2.7.3 for 2.6.7-rc1-mm1: core
  CONFIG_PERFCTR=n build fix
  From: Mikael Pettersson <mikpe@csd.uu.se>
  Subject: [PATCH][6/6] perfctr-2.7.3 for 2.6.7-rc1-mm1: misc

perfctr-i386.patch
  From: Mikael Pettersson <mikpe@csd.uu.se>
  Subject: [PATCH][2/6] perfctr-2.7.3 for 2.6.7-rc1-mm1: i386
  perfctr #if/#ifdef cleanup
  perfctr Dothan support
  perfctr x86_tests build fix
  perfctr x86 init bug
  perfctr: K8 fix for internal benchmarking code
  perfctr x86 update

perfctr-x86_64.patch
  From: Mikael Pettersson <mikpe@csd.uu.se>
  Subject: [PATCH][3/6] perfctr-2.7.3 for 2.6.7-rc1-mm1: x86_64

perfctr-ppc.patch
  From: Mikael Pettersson <mikpe@csd.uu.se>
  Subject: [PATCH][4/6] perfctr-2.7.3 for 2.6.7-rc1-mm1: PowerPC
  perfctr ppc32 update
  perfctr update 4/6: PPC32 cleanups
  perfctr ppc32 buglet fix

perfctr-virtualised-counters.patch
  From: Mikael Pettersson <mikpe@csd.uu.se>
  Subject: [PATCH][5/6] perfctr-2.7.3 for 2.6.7-rc1-mm1: virtualised counters
  perfctr update 6/6: misc minor cleanups
  perfctr update 3/6: __user annotations
  perfctr-cpus_complement-fix
  perfctr cpumask cleanup
  perfctr SMP hang fix

make-perfctr_virtual-default-in-kconfig-match-recommendation.patch
  Make PERFCTR_VIRTUAL default in Kconfig match recommendation  in help text

perfctr-ifdef-cleanup.patch
  perfctr ifdef cleanup

perfctr-update-2-6-kconfig-related-updates.patch
  perfctr update 2/6: Kconfig-related updates

perfctr-update-5-6-reduce-stack-usage.patch
  perfctr update 5/6: reduce stack usage

perfctr-low-level-documentation.patch
  perfctr low-level documentation
  perfctr documentation update

perfctr-inheritance-1-3-driver-updates.patch
  perfctr inheritance 1/3: driver updates
  perfctr inheritance illegal sleep bug

perfctr-inheritance-2-3-kernel-updates.patch
  perfctr inheritance 2/3: kernel updates

perfctr-inheritance-3-3-documentation-updates.patch
  perfctr inheritance 3/3: documentation updates

perfctr-inheritance-locking-fix.patch
  perfctr inheritance locking fix

ext3-online-resize-patch.patch
  ext3: online resizing
  ext3-online-resize-warning-fix

nicksched.patch
  nicksched

ext3_bread-cleanup.patch
  ext3_bread() cleanup

pcmcia-implement-driver-model-support.patch
  pcmcia: implement driver model support

pcmcia-update-network-drivers.patch
  pcmcia: update network drivers

pcmcia-update-wireless-drivers.patch
  pcmcia: update wireless drivers

pcmcia-fix-eject-lockup.patch
  pcmcia: fix eject lockup

pcmcia-add-hotplug-support.patch
  pcmcia: add *hotplug support

linux-2.6.8.1-49-rpc_workqueue.patch
  nfs: RPC: Convert rpciod into a work queue for greater flexibility

linux-2.6.8.1-50-rpc_queue_lock.patch
  nfs: RPC: Remove the rpc_queue_lock global spinlock

dvdrw-support-for-267-bk13.patch
  DVD+RW support for 2.6.7-bk13

cdrw-packet-writing-support-for-267-bk13.patch
  CDRW packet writing support
  packet: remove #warning
  packet writing: door unlocking fix
  pkt_lock_door() warning fix
  Fix race in pktcdvd kernel thread handling
  Fix open/close races in pktcdvd
  packet writing: review fixups
  Remove pkt_dev from struct pktcdvd_device
  packet writing: convert to seq_file

dvd-rw-packet-writing-update.patch
  Packet writing support for DVD-RW and DVD+RW discs.
  Get blockdev size right in pktcdvd after switching discs

packet-writing-docco.patch
  packet writing documentation
  Trivial CDRW packet writing doc update

control-pktcdvd-with-an-auxiliary-character-device.patch
  Control pktcdvd with an auxiliary character device
  Subject: Re: 2.6.8-rc2-mm2
  control-pktcdvd-with-an-auxiliary-character-device-fix

simplified-request-size-handling-in-cdrw-packet-writing.patch
  Simplified request size handling in CDRW packet writing

fix-setting-of-maximum-read-speed-in-cdrw-packet-writing.patch
  Fix setting of maximum read speed in CDRW packet writing

packet-writing-reporting-fix.patch
  Packet writing reporting fixes

speed-up-the-cdrw-packet-writing-driver.patch
  Speed up the cdrw packet writing driver

packet-writing-avoid-bio-hackery.patch
  packet writing: avoid BIO hackery

cdrom-buffer-size-fix.patch
  cdrom: buffer sizing fix

cpufreq-driver-for-nforce2-kernel-267.patch
  cpufreq driver for nForce2

allow-modular-ide-pnp.patch
  allow modular ide-pnp

fix-warnings-in-net-irda.patch
  sparse: fix warnings in net/irda/*

add-a-few-might_sleep-checks.patch
  Add a few might_sleep() checks

tmpfs-atomicity-fix.patch
  tmpfs atomicity fix

dev-zero-vs-hugetlb-mappings.patch
  /dev/zero vs hugetlb mappings.

hugetlbfs-private-mappings.patch
  hugetlbfs private mappings

jbd-recovery-latency-fix.patch
  jbd recovery latency fix

truncate_inode_pages-latency-fix.patch
  truncate_inode_pages-latency-fix

journal_clean_checkpoint_list-latency-fix.patch
  journal_clean_checkpoint_list latency fix

journal_clean_checkpoint_list-latency-fix-fix.patch
  journal_clean_checkpoint_list-latency-fix-fix

kjournald-smp-latency-fix.patch
  kjournald-smp-latency-fix

unmap_vmas-smp-latency-fix.patch
  unmap_vmas-smp-latency-fix

__cleanup_transaction-latency-fix.patch
  __cleanup_transaction-latency-fix

prune_dcache-latency-fix.patch
  prune_dcache-latency-fix

filemap_sync-latency-fix.patch
  filemap_sync-latency-fix

slab-latency-fix.patch
  slab-latency-fix

get_user_pages-latency-fix.patch
  get_user_pages-latency-fix

pty_write-latency-fix.patch
  pty_write-latency-fix

create-nodemask_t.patch
  Create nodemask_t
  nodemask fix
  nodemask build fix

add-ixdp2x01-board-support-to-cs89x0-driver.patch
  Add IXDP2x01 board support to CS89x0 driver

b44-add-47xx-support.patch
  b44: add 47xx support

allow-x86_64-to-reenable-interrupts-on-contention.patch
  Allow x86_64 to reenable interrupts on contention

fix-ide-probe-double-detection.patch
  Fix ide probe double detection

fix-smm-failures-on-e750x-systems.patch
  fix SMM failures on E750x systems

serial-cs-and-unusable-port-size-ranges.patch
  serial-cs and unusable port size ranges

vlan-support-for-3c59x-3c90x.patch
  VLAN support for 3c59x/3c90x

scsi-qla2xxx-fix-inline-compile-errors.patch
  qla2xxx gcc-3.5 fixes

add-support-for-it8212-ide-controllers.patch
  Add support for IT8212 IDE controllers

i386-hotplug-cpu.patch
  i386 Hotplug CPU

hotplug-cpu-fix-apic-queued-timer-vector-race.patch
  Hotplug cpu: Fix APIC queued timer vector race

iteraid.patch
  ITE RAID driver
  iteraid cleanup
  iteraid warning fix
  iteraid: pci_enable_device() for IRQ routing

igxb-speedup.patch
  igxb speedup

serialize-access-to-ide-devices.patch
  serialize access to ide devices

remove-unconditional-pci-acpi-irq-routing.patch
  remove unconditional PCI ACPI IRQ routing

add-pci_fixup_enable-pass.patch
  pci: add pci_fixup_enable pass

disable-atykb-warning.patch
  disable atykb "too many keys pressed" warning

x86_64-numa-emulation.patch
  x86_64: emulate NUMA on non-NUMA hardware

wireless-extension-v17-for-linus.patch
  Wireless Extension v17 for Linus

wireless-drivers-update-for-we-17.patch
  Wireless drivers update for WE-17

rss-ulimit-enforcement.patch
  RSS ulimit enforcement

add-some-key-management-specific-error-codes.patch
  Add some key management specific error codes

implement-in-kernel-keys-keyring-management.patch
  implement in-kernel keys & keyring management

implement-in-kernel-keys-keyring-management-update.patch
  keys & keyring management update patch

implement-in-kernel-keys-keyring-management-update-build-fix.patch
  implement-in-kernel-keys-keyring-management-update-build-fix

implement-in-kernel-keys-keyring-management-update-build-fix-2.patch
  implement-in-kernel-keys-keyring-management-update-build-fix-2

key-management-patch-cleanup.patch
  key management patch cleanup

keys-keyring-management-keyfs-patch.patch
  keys & keyring management: keyfs patch

keyfs-build-fix.patch
  keyfs build fix

implement-in-kernel-keys-keyring-management-afs-workaround.patch
  implement-in-kernel-keys-keyring-management afs workaround

268-rc3-jffs2-unable-to-read-filesystems.patch
  jffs2 unable to read filesystems

ide-do-spin-up-for-all-platforms.patch
  IDE: do spin up for all platforms

qlogic-isp2x00-remove-needless-busyloop.patch
  QLogic ISP2x00: remove needless busyloop

dnotify-autofs-may-create-signal-restart-syscall-loop.patch
  dnotify + autofs may create signal/restart syscall loop

using-get_cycles-for-add_timer_randomness.patch
  Using get_cycles for add_timer_randomness

waitid-system-call.patch
  waitid system call

waitid-system-call-update.patch
  waitid system call update

waitid-ia64-build-fix.patch
  waitid-ia64-build-fix

waitid-system-call-cleanups.patch
  waitid-system-call cleanups

mostly-remove-module_parm.patch
  mostly remove module_parm()

serial-8250-optionally-skip-autodetection.patch
  Serial 8250 optionally skip autodetection

serial-8250-omap-support.patch
  Serial 8250 OMAP support

add-to-snd-intel8x0-ac97-quirk-list.patch
  add to snd-intel8x0 AC97 quirk list

defxx-trivial-updates.patch
  defxx trivial updates

defxx-device-name-fixes.patch
  defxx device name fixes

jffs2-mount-options-discarded.patch
  JFFS2 mount options discarded

assign_irq_vector-section-fix.patch
  assign_irq_vector __init section fix

find_isa_irq_pin-should-not-be-__init.patch
  find_isa_irq_pin should not be __init

kexec-i8259-shutdowni386.patch
  kexec: i8259-shutdown.i386

kexec-i8259-shutdown-x86_64.patch
  kexec: x86_64 i8259 shutdown

kexec-apic-virtwire-on-shutdowni386patch.patch
  kexec: apic-virtwire-on-shutdown.i386.patch

kexec-apic-virtwire-on-shutdownx86_64.patch
  kexec: apic-virtwire-on-shutdown.x86_64

kexec-ioapic-virtwire-on-shutdowni386.patch
  kexec: ioapic-virtwire-on-shutdown.i386

kexec-ioapic-virtwire-on-shutdownx86_64.patch
  kexec: ioapic-virtwire-on-shutdown.x86_64

kexec-e820-64bit.patch
  kexec: e820-64bit

kexec-kexec-generic.patch
  kexec: kexec-generic

kexec-machine_shutdownx86_64.patch
  kexec: machine_shutdown.x86_64

kexec-kexecx86_64.patch
  kexec: kexec.x86_64

kexec-machine_shutdowni386.patch
  kexec: machine_shutdown.i386

kexec-kexeci386.patch
  kexec: kexec.i386

kexec-use_mm.patch
  kexec: use_mm

kexec-kexecppc.patch
  kexec: kexec.ppc

new-bitmap-list-format-for-cpusets.patch
  new bitmap list format (for cpusets)

cpusets-big-numa-cpu-and-memory-placement.patch
  cpusets - big numa cpu and memory placement

cpusets-config_cpusets-depends-on-smp.patch
  Cpusets: CONFIG_CPUSETS depends on SMP

cpusets-tasks-file-simplify-format-fixes.patch
  Cpusets tasks file: simplify format, fixes

cpusets-simplify-memory-generation.patch
  Cpusets: simplify memory generation

reiser4-sb_sync_inodes.patch
  reiser4: vfs: add super_operations.sync_inodes()

reiser4-sb_sync_inodes-cleanup.patch
  reiser4-sb_sync_inodes-cleanup

reiser4-allow-drop_inode-implementation.patch
  reiser4: export vfs inode.c symbols

reiser4-allow-drop_inode-implementation-cleanup.patch
  reiser4-allow-drop_inode-implementation-cleanup

reiser4-truncate_inode_pages_range.patch
  reiser4: vfs: add truncate_inode_pages_range()

reiser4-truncate_inode_pages_range-cleanup.patch
  reiser4-truncate_inode_pages_range-cleanup

reiser4-export-remove_from_page_cache.patch
  reiser4: export pagecache add/remove functions to modules

reiser4-export-page_cache_readahead.patch
  reiser4: export page_cache_readahead to modules

reiser4-reget-page-mapping.patch
  reiser4: vfs: re-check page->mapping after calling try_to_release_page()

reiser4-rcu-barrier.patch
  reiser4: add rcu_barrier() synchronization point

reiser4-rcu-barrier-fix.patch
  reiser4-rcu-barrier fix

reiser4-export-inode_lock.patch
  reiser4: export inode_lock to modules

reiser4-export-inode_lock-cleanup.patch
  reiser4-export-inode_lock-cleanup

reiser4-export-pagevec-funcs.patch
  reiser4: export pagevec functions to modules

reiser4-export-pagevec-funcs-cleanup.patch
  reiser4-export-pagevec-funcs-cleanup

reiser4-export-radix_tree_preload.patch
  reiser4: export radix_tree_preload() to modules

reiser4-radix-tree-tag.patch
  reiser4: add new radix tree tag

reiser4-radix_tree_lookup_slot.patch
  reiser4: add radix_tree_lookup_slot()

reiser4-aliased-dir.patch
  reiser4: vfs: handle aliased directories

reiser4-kobject-umount-race.patch
  reiser4: introduce filesystem kobjects

reiser4-kobject-umount-race-cleanup.patch
  reiser4-kobject-umount-race-cleanup

reiser4-perthread-pages.patch
  reiser4: per-thread page pools

reiser4-unstatic-kswapd.patch
  reiser4: make kswapd() unstatic for debug

reiser4-include-reiser4.patch
  reiser4: add to build system

reiser4-4kstacks-fix.patch
  resier4-4kstacks-fix

reiser4-doc.patch
  reiser4: documentation

reiser4-doc-update.patch
  Update Documentation/Changes for reiser4

reiser4-only.patch
  reiser4: main fs

reiser4-prefetch-warning-fix.patch
  reiser4: prefetch warning fix

reiser4-mode-fix.patch
  reiser4: mode type fix

reiser4-get_context_ok-warning-fixes.patch
  reiser4: get_context_ok() warning fixes

reiser4-remove-debug.patch
  resier4: remove debug stuff

reiser4-spinlock-debugging-build-fix-2.patch
  reiser4-spinlock-debugging-build-fix-2

reiser4-sparc64-build-fix.patch
  reiser4 sparc64 build fix

sys_reiser4-sparc64-build-fix.patch
  sys_reiser4 sparc64 build fix

reiser4-printk-warning-fixes.patch
  reiser4 printk warning fixes

fix-rusage-semantics.patch
  fix rusage semantics

fix-mt-reparenting-when-thread-group-leader-dies.patch
  fix MT reparenting when thread group leader dies

acpi-based-floppy-controller-enumeration.patch
  ACPI-based floppy controller enumeration

possible-dcache-bug-debugging-patch.patch
  Possible dcache BUG: debugging patch

copy_mount_options-size-fix.patch
  copy_mount_options size fix

improve-oprofile-on-many-way-systems.patch
  improve OProfile on many-way systems

oprofile-ia64-performance-counter-support.patch
  OProfile ia64 performance counter support

fix-pid-hash-sizing.patch
  fix PID hash sizing

use-hlist-for-pid-hash.patch
  use hlist for pid hash

use-hlist-for-pid-hash-cache-friendliness.patch
  use hlist for pid hash: cache friendliness

split-timer-resources.patch
  Split timer resources

reduce-casting-in-sysenterc.patch
  reduce casting in sysenter.c

cast-page_offset-math-to-void-in-early-printk.patch
  cast PAGE_OFFSET math to void* in early printk

call-virt_to_page-with-void-not-ul.patch
  call virt_to_page() with void*, not UL

vmalloc_fault-cleanup.patch
  vmalloc_fault() cleanup

dont-align-virt_to_page-args.patch
  don't align virt_to_page() args

include-asm-pageh-for-virt_to_page.patch
  include asm/page.h for virt_to_page()

task_vsize-locking-cleanup.patch
  task_vsize() locking cleanup

task_vsize-locking-cleanup-warning-fix.patch
  task_vsize-locking-cleanup warning fix

o1-proc_pid_statm.patch
  O(1) proc_pid_statm()

o1-proc_pid_statm-fix.patch
  fix text reporting in O(1) proc_pid_statm()

task-statm-no-procfs-fix.patch
  speed up /proc/pid/statm for !CONFIG_PROC_FS

task-statm-reserved-fix.patch
  /proc/pid/statm accounting fixes

task-statm-dontcopy-fix.patch
  Unaccount VM_DONTCOPY vmas properly

r8169-add-ethtool_opsget_regs_len-get_regs.patch
  r8169: add ethtool_ops.{get_regs_len/get_regs}

r8169-per-device-receive-buffer-size.patch
  r8169: per device receive buffer size

r8169-code-cleanup.patch
  r8169: code cleanup

r8169-enable-mwi.patch
  r8169: enable MWI

r8169-bump-version-number.patch
  r8169: bump version number

r8169-sync-the-names-of-a-few-bits-with-the-8139cp-driver.patch
  r8169: sync the names of a few bits with the 8139cp driver

r8169-comment-a-gcc-295x-bug.patch
  r8169: comment a gcc 2.95.x bug

r8169-tx-checksum-offload.patch
  r8169: Tx checksum offload

r8169-advertise-dma-to-high-memory.patch
  r8169: advertise DMA to high memory

r8169-rx-checksum-support.patch
  r8169: Rx checksum support

r8169-vlan-support.patch
  r8169: vlan support

sane-mlock_limit.patch
  sane mlock_limit

lanana-maintainer-devicestxt-patch-1-2.patch
  LANANA: maintainer update

lanana-maintainer-devicestxt-2.patch
  LANANA: devices.txt update

netmos-9805-parport-interface.patch
  parport: NetMOS 9805 interface

s390-lcs-network-driver.patch
  s390: lcs network driver

s390-common-i-o-layer.patch
  s390: common i/o layer

s390-sclp-driver-changes.patch
  s390: sclp driver changes

s390-qeth-network-driver.patch
  s390: qeth network driver

269-rc1-ifdef-fixes-for-drivers-isdn-hifax.patch
  #ifdef fixes for drivers/isdn/hifax/*

269-rc1-ifdef-cleanup-for-sh64.patch
  #ifdef cleanup for sh64

269-rc1-ifdef-cleanup-for-cris-port.patch
  #ifdef cleanup for cris port

269-rc1-ifdef-cleanup-for-ppc.patch
  #ifdef cleanup for PPC

269-rc1-ifdef-cleanups-in-drivers-net.patch
  #ifdef cleanups in drivers/net

make-oom-killer-points-unsigned-long.patch
  make oom killer points unsigned long

dvb-pci_enable_device-fix.patch
  dvb pci_enable_device() fix

copying-unaligned-data-across-user-kernel-boundary.patch
  Copying unaligned data across user/kernel boundary

re-fix-pagecache-reading-off-by-one.patch
  fix pagecache reading off-by-one

re-fix-pagecache-reading-off-by-one-cleanup.patch
  re-fix-pagecache-reading-off-by-one-cleanup

waitqueue_debug-crapectomy.patch
  WAITQUEUE_DEBUG cleanup

ftape-support-for-x86_64.patch
  ftape support for x86_64

keep-sparc32-config-consistent.patch
  Keep sparc32 config consistent

fix-typo-in-bw2c.patch
  Fix typo in bw2.c

interrupt-is-enabled-before-it-should-be-when-kernel-is-booted.patch
  interrupt is enabled before it should be when kernel is booted

hvcs-hotplug-fixes.patch
  HVCS hotplug fixes

amiga-partition-reading-fix.patch
  Amiga partition reading fix

problem-with-sis900-unknown-phy.patch
  Problem with SiS900 - Unknown PHY

kallsyms-data-size-reduction--lookup-speedup.patch
  kallsyms data size reduction / lookup speedup

prevent-memory-leak-in-devpts.patch
  Prevent memory leak in devpts

revert-ioc_eth3-pci_enable_device-changes.patch
  revert ioc3-eth.c pci_enable_device() changes

fix-hp100c-for-pci_enable_device-changes.patch
  Fix hp100.c for pci_enable_device() changes

x86_64-vs-select-fix.patch
  Fix x86_64 vs select.c namespace clash

must_check-copy_to_user.patch
  must_check-copy_to_user

copy_to_user-checking.patch
  copy_to_user-checking

sym_requeue_awaiting_cmds-uninit-var-fix.patch
  sym_requeue_awaiting_cmds() warning fix

de4x5-idiocy-fix.patch
  de4x5 warning fix

[0/4] standardized waitqueue hashing

[William Lee Irwin III]

On Thu, Aug 26, 2004 at 01:47:45AM -0700, Andrew Morton wrote:
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc1/2.6.9-rc1-mm1/
> - nicksched is still here.  There has been very little feedback, except that
>   it seems to slow some workloads on NUMA.
> - Added a __must_check to the x86 copy_*_user functions.  This means that
>   with a sufficiently recent gcc, all unchecked copy_*_user() calls will
>   generate a warning.
>   I fixed a few things, but binfmt_elf.c is a mess.
>   It's not clear how to apply the same debug check to put_user() and
>   friends.

The following patch series consolidates the various instances of
waitqueue hashing to use a uniform structure and share the per-zone
hashtable among all waitqueue hashers. This is expected to increase the
number of hashtable buckets available for waiting on bh's and inodes
and eliminate statically allocated kernel data structures for greater
node locality and reduced kernel image size. Some attempt was made to
look similar to Oleg Nesterov's suggested API in order to provide some
kind of credit for independent invention of something very similar (the
original versions of these patches predated my public postings on the
subject of filtered waitqueues).

These patches have the further benefit and intention of enabling aio
to use filtered wakeups by standardizing the data structure passed to
wake functions so that embedded waitqueue elements in aio structures
may be succesfully passed to the filtered wakeup wake functions, though
this patch series doesn't implement that particular functionality.

Successfully stress-tested on x86-64 and ia64.


-- wli

[1/4] standardize bit waiting data type

[William Lee Irwin III]

On Fri, Aug 27, 2004 at 10:26:27PM -0700, William Lee Irwin III wrote:
> The following patch series consolidates the various instances of
> waitqueue hashing to use a uniform structure and share the per-zone
> hashtable among all waitqueue hashers. This is expected to increase the
> number of hashtable buckets available for waiting on bh's and inodes
> and eliminate statically allocated kernel data structures for greater
> node locality and reduced kernel image size. Some attempt was made to
> look similar to Oleg Nesterov's suggested API in order to provide some
> kind of credit for independent invention of something very similar (the
> original versions of these patches predated my public postings on the
> subject of filtered waitqueues).

Eliminate specialized page and bh waitqueue hashing structures in favor
of a standardized structure, using wake_up_bit() to wake waiters using
the standardized wait_bit_key structure.

Index: mm1-2.6.9-rc1/fs/buffer.c
===================================================================
--- mm1-2.6.9-rc1.orig/fs/buffer.c	2004-08-26 15:04:08.000000000 -0700
+++ mm1-2.6.9-rc1/fs/buffer.c	2004-08-27 22:02:17.837872264 -0700
@@ -43,26 +43,6 @@
 
 #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
 
-struct bh_wait_queue {
-	struct buffer_head *bh;
-	wait_queue_t wait;
-};
-
-#define __DEFINE_BH_WAIT(name, b, f)					\
-	struct bh_wait_queue name = {					\
-		.bh	= b,						\
-		.wait	= {						\
-				.task	= current,			\
-				.flags	= f,				\
-				.func	= bh_wake_function,		\
-				.task_list =				\
-					LIST_HEAD_INIT(name.wait.task_list),\
-			},						\
-	}
-#define DEFINE_BH_WAIT(name, bh)	__DEFINE_BH_WAIT(name, bh, 0)
-#define DEFINE_BH_WAIT_EXCLUSIVE(name, bh) \
-		__DEFINE_BH_WAIT(name, bh, WQ_FLAG_EXCLUSIVE)
-
 /*
  * Hashed waitqueue_head's for wait_on_buffer()
  */
@@ -93,24 +73,10 @@
 	wait_queue_head_t *wq = bh_waitq_head(bh);
 
 	smp_mb();
-	if (waitqueue_active(wq))
-		__wake_up(wq, TASK_INTERRUPTIBLE|TASK_UNINTERRUPTIBLE, 1, bh);
+	__wake_up_bit(wq, &bh->b_state, BH_Lock);
 }
 EXPORT_SYMBOL(wake_up_buffer);
 
-static int bh_wake_function(wait_queue_t *wait, unsigned mode,
-				int sync, void *key)
-{
-	struct buffer_head *bh = key;
-	struct bh_wait_queue *wq;
-
-	wq = container_of(wait, struct bh_wait_queue, wait);
-	if (wq->bh != bh || buffer_locked(bh))
-		return 0;
-	else
-		return autoremove_wake_function(wait, mode, sync, key);
-}
-
 static void sync_buffer(struct buffer_head *bh)
 {
 	struct block_device *bd;
@@ -124,7 +90,7 @@
 void fastcall __lock_buffer(struct buffer_head *bh)
 {
 	wait_queue_head_t *wqh = bh_waitq_head(bh);
-	DEFINE_BH_WAIT_EXCLUSIVE(wait, bh);
+	DEFINE_WAIT_BIT(wait, &bh->b_state, BH_Lock);
 
 	do {
 		prepare_to_wait_exclusive(wqh, &wait.wait,
@@ -153,15 +119,13 @@
 void __wait_on_buffer(struct buffer_head * bh)
 {
 	wait_queue_head_t *wqh = bh_waitq_head(bh);
-	DEFINE_BH_WAIT(wait, bh);
+	DEFINE_WAIT_BIT(wait, &bh->b_state, BH_Lock);
 
-	do {
-		prepare_to_wait(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
-		if (buffer_locked(bh)) {
-			sync_buffer(bh);
-			io_schedule();
-		}
-	} while (buffer_locked(bh));
+	prepare_to_wait(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
+	if (buffer_locked(bh)) {
+		sync_buffer(bh);
+		io_schedule();
+	}
 	finish_wait(wqh, &wait.wait);
 }
 
Index: mm1-2.6.9-rc1/kernel/fork.c
===================================================================
--- mm1-2.6.9-rc1.orig/kernel/fork.c	2004-08-26 15:04:12.000000000 -0700
+++ mm1-2.6.9-rc1/kernel/fork.c	2004-08-27 22:02:13.647509296 -0700
@@ -227,6 +227,29 @@
 
 EXPORT_SYMBOL(autoremove_wake_function);
 
+int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *arg)
+{
+	struct wait_bit_key *key = arg;
+	struct wait_bit_queue *wait_bit =
+		container_of(wait, struct wait_bit_queue, wait);
+
+	if (wait_bit->key.flags != key->flags ||
+			wait_bit->key.bit_nr != key->bit_nr ||
+			test_bit(key->bit_nr, key->flags))
+		return 0;
+	else
+		return autoremove_wake_function(wait, mode, sync, key);
+}
+EXPORT_SYMBOL(wake_bit_function);
+
+void fastcall __wake_up_bit(wait_queue_head_t *wq, unsigned long *word, int bit)
+{
+	struct wait_bit_key key = __WAIT_BIT_KEY_INITIALIZER(word, bit);
+	if (waitqueue_active(wq))
+		__wake_up(wq, TASK_INTERRUPTIBLE|TASK_UNINTERRUPTIBLE, 1, &key);
+}
+EXPORT_SYMBOL(__wake_up_bit);
+
 void __init fork_init(unsigned long mempages)
 {
 #ifndef __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
Index: mm1-2.6.9-rc1/mm/filemap.c
===================================================================
--- mm1-2.6.9-rc1.orig/mm/filemap.c	2004-08-27 09:11:29.000000000 -0700
+++ mm1-2.6.9-rc1/mm/filemap.c	2004-08-27 22:02:05.772706448 -0700
@@ -355,40 +355,6 @@
  * at a cost of "thundering herd" phenomena during rare hash
  * collisions.
  */
-struct page_wait_queue {
-	struct page *page;
-	int bit;
-	wait_queue_t wait;
-};
-
-static int page_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key)
-{
-	struct page *page = key;
-	struct page_wait_queue *wq;
-
-	wq = container_of(wait, struct page_wait_queue, wait);
-	if (wq->page != page || test_bit(wq->bit, &page->flags))
-		return 0;
-	else
-		return autoremove_wake_function(wait, mode, sync, NULL);
-}
-
-#define __DEFINE_PAGE_WAIT(name, p, b, f)				\
-	struct page_wait_queue name = {					\
-		.page	= p,						\
-		.bit	= b,						\
-		.wait	= {						\
-			.task	= current,				\
-			.func	= page_wake_function,			\
-			.flags	= f,					\
-			.task_list = LIST_HEAD_INIT(name.wait.task_list),\
-		},							\
-	}
-
-#define DEFINE_PAGE_WAIT(name, p, b)	__DEFINE_PAGE_WAIT(name, p, b, 0)
-#define DEFINE_PAGE_WAIT_EXCLUSIVE(name, p, b)				\
-		__DEFINE_PAGE_WAIT(name, p, b, WQ_FLAG_EXCLUSIVE)
-
 static wait_queue_head_t *page_waitqueue(struct page *page)
 {
 	const struct zone *zone = page_zone(page);
@@ -396,27 +362,16 @@
 	return &zone->wait_table[hash_ptr(page, zone->wait_table_bits)];
 }
 
-static void wake_up_page(struct page *page)
-{
-	const unsigned int mode = TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE;
-	wait_queue_head_t *waitqueue = page_waitqueue(page);
-
-	if (waitqueue_active(waitqueue))
-		__wake_up(waitqueue, mode, 1, page);
-}
-
 void fastcall wait_on_page_bit(struct page *page, int bit_nr)
 {
 	wait_queue_head_t *waitqueue = page_waitqueue(page);
-	DEFINE_PAGE_WAIT(wait, page, bit_nr);
+	DEFINE_WAIT_BIT(wait, (unsigned long *)&page->flags, bit_nr);
 
-	do {
-		prepare_to_wait(waitqueue, &wait.wait, TASK_UNINTERRUPTIBLE);
-		if (test_bit(bit_nr, &page->flags)) {
-			sync_page(page);
-			io_schedule();
-		}
-	} while (test_bit(bit_nr, &page->flags));
+	prepare_to_wait(waitqueue, &wait.wait, TASK_UNINTERRUPTIBLE);
+	if (test_bit(bit_nr, &page->flags)) {
+		sync_page(page);
+		io_schedule();
+	}
 	finish_wait(waitqueue, &wait.wait);
 }
 
@@ -439,11 +394,12 @@
  */
 void fastcall unlock_page(struct page *page)
 {
+	unsigned long *word = (unsigned long *)&page->flags;
 	smp_mb__before_clear_bit();
 	if (!TestClearPageLocked(page))
 		BUG();
 	smp_mb__after_clear_bit(); 
-	wake_up_page(page);
+	__wake_up_bit(page_waitqueue(page), word, PG_locked);
 }
 
 EXPORT_SYMBOL(unlock_page);
@@ -454,12 +410,13 @@
  */
 void end_page_writeback(struct page *page)
 {
+	unsigned long *word = (unsigned long *)&page->flags;
 	if (!TestClearPageReclaim(page) || rotate_reclaimable_page(page)) {
 		if (!test_clear_page_writeback(page))
 			BUG();
 		smp_mb__after_clear_bit();
 	}
-	wake_up_page(page);
+	__wake_up_bit(page_waitqueue(page), word, PG_writeback);
 }
 
 EXPORT_SYMBOL(end_page_writeback);
@@ -475,7 +432,7 @@
 void fastcall __lock_page(struct page *page)
 {
 	wait_queue_head_t *wqh = page_waitqueue(page);
-	DEFINE_PAGE_WAIT_EXCLUSIVE(wait, page, PG_locked);
+	DEFINE_WAIT_BIT(wait, (unsigned long *)&page->flags, PG_locked);
 
 	while (TestSetPageLocked(page)) {
 		prepare_to_wait_exclusive(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
Index: mm1-2.6.9-rc1/include/linux/wait.h
===================================================================
--- mm1-2.6.9-rc1.orig/include/linux/wait.h	2004-08-26 15:03:53.000000000 -0700
+++ mm1-2.6.9-rc1/include/linux/wait.h	2004-08-27 22:02:21.778273232 -0700
@@ -37,6 +37,16 @@
 	struct list_head task_list;
 };
 
+struct wait_bit_key {
+	unsigned long *flags;
+	int bit_nr;
+};
+
+struct wait_bit_queue {
+	struct wait_bit_key key;
+	wait_queue_t wait;
+};
+
 struct __wait_queue_head {
 	spinlock_t lock;
 	struct list_head task_list;
@@ -63,6 +73,9 @@
 #define DECLARE_WAIT_QUEUE_HEAD(name) \
 	wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name)
 
+#define __WAIT_BIT_KEY_INITIALIZER(word, bit)				\
+	{ .flags = word, .bit_nr = bit, }
+
 static inline void init_waitqueue_head(wait_queue_head_t *q)
 {
 	q->lock = SPIN_LOCK_UNLOCKED;
@@ -125,6 +138,7 @@
 void FASTCALL(__wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key));
 extern void FASTCALL(__wake_up_locked(wait_queue_head_t *q, unsigned int mode));
 extern void FASTCALL(__wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr));
+void FASTCALL(__wake_up_bit(wait_queue_head_t *, unsigned long *, int));
 
 #define wake_up(x)			__wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 1, NULL)
 #define wake_up_nr(x, nr)		__wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, nr, NULL)
@@ -277,6 +291,7 @@
 				wait_queue_t *wait, int state));
 void FASTCALL(finish_wait(wait_queue_head_t *q, wait_queue_t *wait));
 int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
+int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
 
 #define DEFINE_WAIT(name)						\
 	wait_queue_t name = {						\
@@ -287,6 +302,17 @@
 				},					\
 	}
 
+#define DEFINE_WAIT_BIT(name, word, bit)				\
+	struct wait_bit_queue name = {					\
+		.key = __WAIT_BIT_KEY_INITIALIZER(word, bit),		\
+		.wait	= {						\
+			.task		= current,			\
+			.func		= wake_bit_function,		\
+			.task_list	=				\
+				LIST_HEAD_INIT(name.wait.task_list),	\
+		},							\
+	}
+
 #define init_wait(wait)							\
 	do {								\
 		wait->task = current;					\

Re: [1/4] standardize bit waiting data type

[Andrew Morton]

William Lee Irwin III <wli@holomorphy.com> wrote:
>
>  void fastcall unlock_page(struct page *page)
>   {
>  +	unsigned long *word = (unsigned long *)&page->flags;

This will break if a little-endian 64-bit architecture elects to use a
32-bit page_flags_t.

Re: [1/4] standardize bit waiting data type

[William Lee Irwin III]

William Lee Irwin III <wli@holomorphy.com> wrote:
>> void fastcall unlock_page(struct page *page)
>>  {
>> +	unsigned long *word = (unsigned long *)&page->flags;

On Fri, Aug 27, 2004 at 11:17:13PM -0700, Andrew Morton wrote:
> This will break if a little-endian 64-bit architecture elects to use a
> 32-bit page_flags_t.

You mean a big-endian one? I did check to be sure none did so; only
x86-64 does. Easy enough to dress up so BE arches can do it too.


-- wli

Re: [1/4] standardize bit waiting data type

[Andrew Morton]

William Lee Irwin III <wli@holomorphy.com> wrote:
>
> William Lee Irwin III <wli@holomorphy.com> wrote:
> >> void fastcall unlock_page(struct page *page)
> >>  {
> >> +	unsigned long *word = (unsigned long *)&page->flags;
> 
> On Fri, Aug 27, 2004 at 11:17:13PM -0700, Andrew Morton wrote:
> > This will break if a little-endian 64-bit architecture elects to use a
> > 32-bit page_flags_t.
> 
> You mean a big-endian one? I did check to be sure none did so; only
> x86-64 does. Easy enough to dress up so BE arches can do it too.
> 

hm.  Actually, the page_flags_t hack can only work on little-endian
hardware anyway.

perhaps your implementation should imitate x86_64/bitops.h and use a void*,
along with apologetic comments.

Re: [1/4] standardize bit waiting data type

[William Lee Irwin III]

William Lee Irwin III <wli@holomorphy.com> wrote:
>> You mean a big-endian one? I did check to be sure none did so; only
>> x86-64 does. Easy enough to dress up so BE arches can do it too.

On Fri, Aug 27, 2004 at 11:40:33PM -0700, Andrew Morton wrote:
> hm.  Actually, the page_flags_t hack can only work on little-endian
> hardware anyway.
> perhaps your implementation should imitate x86_64/bitops.h and use a void*,
> along with apologetic comments.

Okay, I'll resend it done that way.


-- wli

[1/4] standardize bit waiting data type

[William Lee Irwin III]

On Fri, Aug 27, 2004 at 11:40:33PM -0700, Andrew Morton wrote:
>> hm.  Actually, the page_flags_t hack can only work on little-endian
>> hardware anyway.
>> perhaps your implementation should imitate x86_64/bitops.h and use a void*,
>> along with apologetic comments.

On Fri, Aug 27, 2004 at 11:48:29PM -0700, William Lee Irwin III wrote:
> Okay, I'll resend it done that way.

I didn't see very many apologies in x86-64 so I wasn't entirely sure
what those would consist of; void * and some minor commentary added.
Let me know if there's something more specific I should add comments
about.

Thanks.


-- wli

Eliminate specialized page and bh waitqueue hashing structures in favor
of a standardized structure, using wake_up_bit() to wake waiters using
the standardized wait_bit_key structure.

Index: mm1-2.6.9-rc1/fs/buffer.c
===================================================================
--- mm1-2.6.9-rc1.orig/fs/buffer.c	2004-08-26 15:04:08.000000000 -0700
+++ mm1-2.6.9-rc1/fs/buffer.c	2004-08-27 23:50:07.644312184 -0700
@@ -43,26 +43,6 @@
 
 #define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
 
-struct bh_wait_queue {
-	struct buffer_head *bh;
-	wait_queue_t wait;
-};
-
-#define __DEFINE_BH_WAIT(name, b, f)					\
-	struct bh_wait_queue name = {					\
-		.bh	= b,						\
-		.wait	= {						\
-				.task	= current,			\
-				.flags	= f,				\
-				.func	= bh_wake_function,		\
-				.task_list =				\
-					LIST_HEAD_INIT(name.wait.task_list),\
-			},						\
-	}
-#define DEFINE_BH_WAIT(name, bh)	__DEFINE_BH_WAIT(name, bh, 0)
-#define DEFINE_BH_WAIT_EXCLUSIVE(name, bh) \
-		__DEFINE_BH_WAIT(name, bh, WQ_FLAG_EXCLUSIVE)
-
 /*
  * Hashed waitqueue_head's for wait_on_buffer()
  */
@@ -93,24 +73,10 @@
 	wait_queue_head_t *wq = bh_waitq_head(bh);
 
 	smp_mb();
-	if (waitqueue_active(wq))
-		__wake_up(wq, TASK_INTERRUPTIBLE|TASK_UNINTERRUPTIBLE, 1, bh);
+	__wake_up_bit(wq, &bh->b_state, BH_Lock);
 }
 EXPORT_SYMBOL(wake_up_buffer);
 
-static int bh_wake_function(wait_queue_t *wait, unsigned mode,
-				int sync, void *key)
-{
-	struct buffer_head *bh = key;
-	struct bh_wait_queue *wq;
-
-	wq = container_of(wait, struct bh_wait_queue, wait);
-	if (wq->bh != bh || buffer_locked(bh))
-		return 0;
-	else
-		return autoremove_wake_function(wait, mode, sync, key);
-}
-
 static void sync_buffer(struct buffer_head *bh)
 {
 	struct block_device *bd;
@@ -124,7 +90,7 @@
 void fastcall __lock_buffer(struct buffer_head *bh)
 {
 	wait_queue_head_t *wqh = bh_waitq_head(bh);
-	DEFINE_BH_WAIT_EXCLUSIVE(wait, bh);
+	DEFINE_WAIT_BIT(wait, &bh->b_state, BH_Lock);
 
 	do {
 		prepare_to_wait_exclusive(wqh, &wait.wait,
@@ -153,15 +119,13 @@
 void __wait_on_buffer(struct buffer_head * bh)
 {
 	wait_queue_head_t *wqh = bh_waitq_head(bh);
-	DEFINE_BH_WAIT(wait, bh);
+	DEFINE_WAIT_BIT(wait, &bh->b_state, BH_Lock);
 
-	do {
-		prepare_to_wait(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
-		if (buffer_locked(bh)) {
-			sync_buffer(bh);
-			io_schedule();
-		}
-	} while (buffer_locked(bh));
+	prepare_to_wait(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
+	if (buffer_locked(bh)) {
+		sync_buffer(bh);
+		io_schedule();
+	}
 	finish_wait(wqh, &wait.wait);
 }
 
Index: mm1-2.6.9-rc1/kernel/fork.c
===================================================================
--- mm1-2.6.9-rc1.orig/kernel/fork.c	2004-08-26 15:04:12.000000000 -0700
+++ mm1-2.6.9-rc1/kernel/fork.c	2004-08-28 01:20:04.105925320 -0700
@@ -227,6 +227,29 @@
 
 EXPORT_SYMBOL(autoremove_wake_function);
 
+int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *arg)
+{
+	struct wait_bit_key *key = arg;
+	struct wait_bit_queue *wait_bit
+		= container_of(wait, struct wait_bit_queue, wait);
+
+	if (wait_bit->key.flags != key->flags ||
+			wait_bit->key.bit_nr != key->bit_nr ||
+			test_bit(key->bit_nr, key->flags))
+		return 0;
+	else
+		return autoremove_wake_function(wait, mode, sync, key);
+}
+EXPORT_SYMBOL(wake_bit_function);
+
+void fastcall __wake_up_bit(wait_queue_head_t *wq, void *word, int bit)
+{
+	struct wait_bit_key key = __WAIT_BIT_KEY_INITIALIZER(word, bit);
+	if (waitqueue_active(wq))
+		__wake_up(wq, TASK_INTERRUPTIBLE|TASK_UNINTERRUPTIBLE, 1, &key);
+}
+EXPORT_SYMBOL(__wake_up_bit);
+
 void __init fork_init(unsigned long mempages)
 {
 #ifndef __HAVE_ARCH_TASK_STRUCT_ALLOCATOR
Index: mm1-2.6.9-rc1/mm/filemap.c
===================================================================
--- mm1-2.6.9-rc1.orig/mm/filemap.c	2004-08-27 09:11:29.000000000 -0700
+++ mm1-2.6.9-rc1/mm/filemap.c	2004-08-28 01:19:28.658314176 -0700
@@ -355,40 +355,6 @@
  * at a cost of "thundering herd" phenomena during rare hash
  * collisions.
  */
-struct page_wait_queue {
-	struct page *page;
-	int bit;
-	wait_queue_t wait;
-};
-
-static int page_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key)
-{
-	struct page *page = key;
-	struct page_wait_queue *wq;
-
-	wq = container_of(wait, struct page_wait_queue, wait);
-	if (wq->page != page || test_bit(wq->bit, &page->flags))
-		return 0;
-	else
-		return autoremove_wake_function(wait, mode, sync, NULL);
-}
-
-#define __DEFINE_PAGE_WAIT(name, p, b, f)				\
-	struct page_wait_queue name = {					\
-		.page	= p,						\
-		.bit	= b,						\
-		.wait	= {						\
-			.task	= current,				\
-			.func	= page_wake_function,			\
-			.flags	= f,					\
-			.task_list = LIST_HEAD_INIT(name.wait.task_list),\
-		},							\
-	}
-
-#define DEFINE_PAGE_WAIT(name, p, b)	__DEFINE_PAGE_WAIT(name, p, b, 0)
-#define DEFINE_PAGE_WAIT_EXCLUSIVE(name, p, b)				\
-		__DEFINE_PAGE_WAIT(name, p, b, WQ_FLAG_EXCLUSIVE)
-
 static wait_queue_head_t *page_waitqueue(struct page *page)
 {
 	const struct zone *zone = page_zone(page);
@@ -396,27 +362,16 @@
 	return &zone->wait_table[hash_ptr(page, zone->wait_table_bits)];
 }
 
-static void wake_up_page(struct page *page)
-{
-	const unsigned int mode = TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE;
-	wait_queue_head_t *waitqueue = page_waitqueue(page);
-
-	if (waitqueue_active(waitqueue))
-		__wake_up(waitqueue, mode, 1, page);
-}
-
 void fastcall wait_on_page_bit(struct page *page, int bit_nr)
 {
 	wait_queue_head_t *waitqueue = page_waitqueue(page);
-	DEFINE_PAGE_WAIT(wait, page, bit_nr);
+	DEFINE_WAIT_BIT(wait, &page->flags, bit_nr);
 
-	do {
-		prepare_to_wait(waitqueue, &wait.wait, TASK_UNINTERRUPTIBLE);
-		if (test_bit(bit_nr, &page->flags)) {
-			sync_page(page);
-			io_schedule();
-		}
-	} while (test_bit(bit_nr, &page->flags));
+	prepare_to_wait(waitqueue, &wait.wait, TASK_UNINTERRUPTIBLE);
+	if (test_bit(bit_nr, &page->flags)) {
+		sync_page(page);
+		io_schedule();
+	}
 	finish_wait(waitqueue, &wait.wait);
 }
 
@@ -443,7 +398,7 @@
 	if (!TestClearPageLocked(page))
 		BUG();
 	smp_mb__after_clear_bit(); 
-	wake_up_page(page);
+	__wake_up_bit(page_waitqueue(page), &page->flags, PG_locked);
 }
 
 EXPORT_SYMBOL(unlock_page);
@@ -459,7 +414,7 @@
 			BUG();
 		smp_mb__after_clear_bit();
 	}
-	wake_up_page(page);
+	__wake_up_bit(page_waitqueue(page), &page->flags, PG_writeback);
 }
 
 EXPORT_SYMBOL(end_page_writeback);
@@ -475,7 +430,7 @@
 void fastcall __lock_page(struct page *page)
 {
 	wait_queue_head_t *wqh = page_waitqueue(page);
-	DEFINE_PAGE_WAIT_EXCLUSIVE(wait, page, PG_locked);
+	DEFINE_WAIT_BIT(wait, &page->flags, PG_locked);
 
 	while (TestSetPageLocked(page)) {
 		prepare_to_wait_exclusive(wqh, &wait.wait, TASK_UNINTERRUPTIBLE);
Index: mm1-2.6.9-rc1/include/linux/wait.h
===================================================================
--- mm1-2.6.9-rc1.orig/include/linux/wait.h	2004-08-26 15:03:53.000000000 -0700
+++ mm1-2.6.9-rc1/include/linux/wait.h	2004-08-27 23:51:01.407138992 -0700
@@ -37,6 +37,16 @@
 	struct list_head task_list;
 };
 
+struct wait_bit_key {
+	void *flags;
+	int bit_nr;
+};
+
+struct wait_bit_queue {
+	struct wait_bit_key key;
+	wait_queue_t wait;
+};
+
 struct __wait_queue_head {
 	spinlock_t lock;
 	struct list_head task_list;
@@ -63,6 +73,9 @@
 #define DECLARE_WAIT_QUEUE_HEAD(name) \
 	wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name)
 
+#define __WAIT_BIT_KEY_INITIALIZER(word, bit)				\
+	{ .flags = word, .bit_nr = bit, }
+
 static inline void init_waitqueue_head(wait_queue_head_t *q)
 {
 	q->lock = SPIN_LOCK_UNLOCKED;
@@ -125,6 +138,7 @@
 void FASTCALL(__wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key));
 extern void FASTCALL(__wake_up_locked(wait_queue_head_t *q, unsigned int mode));
 extern void FASTCALL(__wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr));
+void FASTCALL(__wake_up_bit(wait_queue_head_t *, void *, int));
 
 #define wake_up(x)			__wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, 1, NULL)
 #define wake_up_nr(x, nr)		__wake_up(x, TASK_UNINTERRUPTIBLE | TASK_INTERRUPTIBLE, nr, NULL)
@@ -277,6 +291,7 @@
 				wait_queue_t *wait, int state));
 void FASTCALL(finish_wait(wait_queue_head_t *q, wait_queue_t *wait));
 int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
+int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
 
 #define DEFINE_WAIT(name)						\
 	wait_queue_t name = {						\
@@ -287,6 +302,17 @@
 				},					\
 	}
 
+#define DEFINE_WAIT_BIT(name, word, bit)				\
+	struct wait_bit_queue name = {					\
+		.key = __WAIT_BIT_KEY_INITIALIZER(word, bit),		\
+		.wait	= {						\
+			.task		= current,			\
+			.func		= wake_bit_function,		\
+			.task_list	=				\
+				LIST_HEAD_INIT(name.wait.task_list),	\
+		},							\
+	}
+
 #define init_wait(wait)							\
 	do {								\
 		wait->task = current;					\

Re: [1/4] standardize bit waiting data type

[Christoph Hellwig]

Why __wkae_up_bit, not wake_up_bit?

Re: [1/4] standardize bit waiting data type

[William Lee Irwin III]

On Sat, Aug 28, 2004 at 10:18:49AM +0100, Christoph Hellwig wrote:
> Why __wkae_up_bit, not wake_up_bit?

A wake_up_bit() meant to be used more generally is added later in the
series.


-- wli