* Linux 2.6.27.47
@ 2010-05-26 22:23 Greg KH
2010-05-26 22:23 ` Greg KH
2010-05-27 0:46 ` Grant Coady
0 siblings, 2 replies; 3+ messages in thread
From: Greg KH @ 2010-05-26 22:23 UTC (permalink / raw)
To: linux-kernel, Andrew Morton, torvalds, stable; +Cc: lwn
I'm announcing the release of the 2.6.27.47 kernel. All users of the
2.6.27 kernel series are very strongly encouraged to upgrade.
The updated 2.6.27.y git tree can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-2.6.27.y.git
and can be browsed at the normal kernel.org git web browser:
http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git;a=summary
thanks,
greg k-h
------------
Makefile | 2
arch/x86/kernel/process.c | 6
drivers/acpi/processor_idle.c | 13 +
drivers/ata/libata-eh.c | 6
drivers/char/tty_io.c | 2
drivers/hwmon/w83781d.c | 26 +--
drivers/i2c/busses/i2c-i801.c | 6
drivers/i2c/busses/i2c-tiny-usb.c | 12 -
drivers/i2c/i2c-core.c | 24 ++-
drivers/scsi/megaraid/megaraid_sas.c | 18 ++
drivers/usb/core/inode.c | 4
fs/ext4/balloc.c | 88 ++++++++++---
fs/ext4/ext4.h | 13 +
fs/ext4/ext4_sb.h | 1
fs/ext4/inode.c | 229 ++++++++++++++++++++++++-----------
fs/ext4/mballoc.c | 39 +++--
fs/ext4/super.c | 8 +
fs/nfs/client.c | 2
fs/nfs/dir.c | 2
fs/nfsd/nfs4xdr.c | 8 -
include/linux/percpu_counter.h | 12 -
include/linux/security.h | 10 +
include/linux/writeback.h | 1
kernel/time/clockevents.c | 16 +-
kernel/time/tick-broadcast.c | 7 -
kernel/trace/trace.c | 2
lib/percpu_counter.c | 8 -
mm/mmap.c | 3
mm/nommu.c | 3
mm/page-writeback.c | 2
mm/shmem.c | 8 -
net/sunrpc/svc_xprt.c | 25 ++-
security/security.c | 9 +
sound/pci/mixart/mixart.c | 24 ++-
34 files changed, 437 insertions(+), 202 deletions(-)
Al Viro (1):
nfs d_revalidate() is too trigger-happy with d_drop()
Alan Cox (1):
nfsd: fix vm overcommit crash
Aneesh Kumar K.V (7):
ext4: invalidate pages if delalloc block allocation fails.
ext4: Make sure all the block allocation paths reserve blocks
ext4: Add percpu dirty block accounting.
ext4: Retry block reservation
ext4: Retry block allocation if we have free blocks left
ext4: Use tag dirty lookup during mpage_da_submit_io
vfs: Remove the range_cont writeback mode.
Chuck Lever (1):
NFS: rsize and wsize settings ignored on v4 mounts
Dan Carpenter (2):
ALSA: mixart: range checking proc file
USB: fix testing the wrong variable in fs_create_by_name()
Greg Kroah-Hartman (1):
Linux 2.6.27.47
Jean Delvare (4):
i2c: Fix probing of FSC hardware monitoring chips
hwmon: (w83781d) Request I/O ports individually for probing
i2c-i801: Don't use the block buffer for I2C block writes
i2c-tiny-usb: Fix on big-endian systems
Jeff Garzik (1):
libata: ensure NCQ error result taskfile is fully initialized before returning it via qc->result_tf.
Junjiro R. Okajima (1):
nfsd: fix vm overcommit crash fix #2
Mingming Cao (1):
percpu counter: clean up percpu_counter_sum_and_set()
Neil Brown (1):
nfsd4: bug in read_buf
Oleg Nesterov (1):
tty: release_one_tty() forgets to put pids
Suresh Siddha (1):
clockevent: Prevent dead lock on clockevents_lock
Tejun Heo (1):
libata: retry FS IOs even if it has failed with AC_ERR_INVALID
Tom Tucker (1):
svc: Clean up deferred requests on transport destruction
Tomas Henzl (1):
megaraid_sas: fix for 32bit apps
Wang Sheng-Hui (1):
trace: Fix inappropriate substraction on tracing_pages_allocated in trace_free_page()
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Linux 2.6.27.47
2010-05-26 22:23 Linux 2.6.27.47 Greg KH
@ 2010-05-26 22:23 ` Greg KH
2010-05-27 0:46 ` Grant Coady
1 sibling, 0 replies; 3+ messages in thread
From: Greg KH @ 2010-05-26 22:23 UTC (permalink / raw)
To: linux-kernel, Andrew Morton, torvalds, stable, lwn
diff --git a/Makefile b/Makefile
index ff8d4a3..efc948f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
VERSION = 2
PATCHLEVEL = 6
SUBLEVEL = 27
-EXTRAVERSION = .46
+EXTRAVERSION = .47
NAME = Trembling Tortoise
# *DOCUMENTATION*
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 876e918..f459e3e 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -283,16 +283,12 @@ static void c1e_idle(void)
if (!cpu_isset(cpu, c1e_mask)) {
cpu_set(cpu, c1e_mask);
/*
- * Force broadcast so ACPI can not interfere. Needs
- * to run with interrupts enabled as it uses
- * smp_function_call.
+ * Force broadcast so ACPI can not interfere.
*/
- local_irq_enable();
clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_FORCE,
&cpu);
printk(KERN_INFO "Switch to broadcast mode on CPU%d\n",
cpu);
- local_irq_disable();
}
clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu);
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 5639e27..94483a2 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -317,8 +317,9 @@ static void acpi_timer_check_state(int state, struct acpi_processor *pr,
pr->power.timer_broadcast_on_state = state;
}
-static void acpi_propagate_timer_broadcast(struct acpi_processor *pr)
+static void __lapic_timer_propagate_broadcast(void *arg)
{
+ struct acpi_processor *pr = (struct acpi_processor *) arg;
unsigned long reason;
reason = pr->power.timer_broadcast_on_state < INT_MAX ?
@@ -327,6 +328,12 @@ static void acpi_propagate_timer_broadcast(struct acpi_processor *pr)
clockevents_notify(reason, &pr->id);
}
+static void lapic_timer_propagate_broadcast(struct acpi_processor *pr)
+{
+ smp_call_function_single(pr->id, __lapic_timer_propagate_broadcast,
+ (void *)pr, 1);
+}
+
/* Power(C) State timer broadcast control */
static void acpi_state_timer_broadcast(struct acpi_processor *pr,
struct acpi_processor_cx *cx,
@@ -347,7 +354,7 @@ static void acpi_state_timer_broadcast(struct acpi_processor *pr,
static void acpi_timer_check_state(int state, struct acpi_processor *pr,
struct acpi_processor_cx *cstate) { }
-static void acpi_propagate_timer_broadcast(struct acpi_processor *pr) { }
+static void lapic_timer_propagate_broadcast(struct acpi_processor *pr) { }
static void acpi_state_timer_broadcast(struct acpi_processor *pr,
struct acpi_processor_cx *cx,
int broadcast)
@@ -1177,7 +1184,7 @@ static int acpi_processor_power_verify(struct acpi_processor *pr)
working++;
}
- acpi_propagate_timer_broadcast(pr);
+ lapic_timer_propagate_broadcast(pr);
return (working);
}
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 22995d7..9358fa6 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1497,6 +1497,7 @@ void ata_eh_analyze_ncq_error(struct ata_link *link)
}
/* okay, this error is ours */
+ memset(&tf, 0, sizeof(tf));
rc = ata_eh_read_log_10h(dev, &tag, &tf);
if (rc) {
ata_link_printk(link, KERN_ERR, "failed to read log page 10h "
@@ -1900,8 +1901,9 @@ static void ata_eh_link_autopsy(struct ata_link *link)
qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER);
/* determine whether the command is worth retrying */
- if (!(qc->err_mask & AC_ERR_INVALID) &&
- ((qc->flags & ATA_QCFLAG_IO) || qc->err_mask != AC_ERR_DEV))
+ if (qc->flags & ATA_QCFLAG_IO ||
+ (!(qc->err_mask & AC_ERR_INVALID) &&
+ qc->err_mask != AC_ERR_DEV))
qc->flags |= ATA_QCFLAG_RETRY;
/* accumulate error info */
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index e6788f4..f325128 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1893,6 +1893,8 @@ static void release_one_tty(struct tty_struct *tty, int idx)
list_del_init(&tty->tty_files);
file_list_unlock();
+ put_pid(tty->pgrp);
+ put_pid(tty->session);
free_tty_struct(tty);
}
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index f942ecd..0af9a2c 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -1797,17 +1797,17 @@ static int __init
w83781d_isa_found(unsigned short address)
{
int val, save, found = 0;
-
- /* We have to request the region in two parts because some
- boards declare base+4 to base+7 as a PNP device */
- if (!request_region(address, 4, "w83781d")) {
- pr_debug("w83781d: Failed to request low part of region\n");
- return 0;
- }
- if (!request_region(address + 4, 4, "w83781d")) {
- pr_debug("w83781d: Failed to request high part of region\n");
- release_region(address, 4);
- return 0;
+ int port;
+
+ /* Some boards declare base+0 to base+7 as a PNP device, some base+4
+ * to base+7 and some base+5 to base+6. So we better request each port
+ * individually for the probing phase. */
+ for (port = address; port < address + W83781D_EXTENT; port++) {
+ if (!request_region(port, 1, "w83781d")) {
+ pr_debug("w83781d: Failed to request port 0x%x\n",
+ port);
+ goto release;
+ }
}
#define REALLY_SLOW_IO
@@ -1881,8 +1881,8 @@ w83781d_isa_found(unsigned short address)
val == 0x30 ? "W83782D" : "W83781D", (int)address);
release:
- release_region(address + 4, 4);
- release_region(address, 4);
+ for (port--; port >= address; port--)
+ release_region(port, 1);
return found;
}
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index dc7ea32..177346e 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -413,9 +413,11 @@ static int i801_block_transaction(union i2c_smbus_data *data, char read_write,
data->block[0] = 32; /* max for SMBus block reads */
}
+ /* Experience has shown that the block buffer can only be used for
+ SMBus (not I2C) block transactions, even though the datasheet
+ doesn't mention this limitation. */
if ((i801_features & FEATURE_BLOCK_BUFFER)
- && !(command == I2C_SMBUS_I2C_BLOCK_DATA
- && read_write == I2C_SMBUS_READ)
+ && command != I2C_SMBUS_I2C_BLOCK_DATA
&& i801_set_block_buffer_mode() == 0)
result = i801_block_transaction_by_block(data, read_write,
hwpec);
diff --git a/drivers/i2c/busses/i2c-tiny-usb.c b/drivers/i2c/busses/i2c-tiny-usb.c
index b1c050f..e29b6d5 100644
--- a/drivers/i2c/busses/i2c-tiny-usb.c
+++ b/drivers/i2c/busses/i2c-tiny-usb.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/module.h>
+#include <linux/types.h>
/* include interfaces to usb layer */
#include <linux/usb.h>
@@ -31,8 +32,8 @@
#define CMD_I2C_IO_END (1<<1)
/* i2c bit delay, default is 10us -> 100kHz */
-static int delay = 10;
-module_param(delay, int, 0);
+static unsigned short delay = 10;
+module_param(delay, ushort, 0);
MODULE_PARM_DESC(delay, "bit delay in microseconds, "
"e.g. 10 for 100kHz (default is 100kHz)");
@@ -109,7 +110,7 @@ static int usb_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num)
static u32 usb_func(struct i2c_adapter *adapter)
{
- u32 func;
+ __le32 func;
/* get functionality from adapter */
if (usb_read(adapter, CMD_GET_FUNC, 0, 0, &func, sizeof(func)) !=
@@ -118,7 +119,7 @@ static u32 usb_func(struct i2c_adapter *adapter)
return 0;
}
- return func;
+ return le32_to_cpu(func);
}
/* This is the actual algorithm we define */
@@ -216,8 +217,7 @@ static int i2c_tiny_usb_probe(struct usb_interface *interface,
"i2c-tiny-usb at bus %03d device %03d",
dev->usb_dev->bus->busnum, dev->usb_dev->devnum);
- if (usb_write(&dev->adapter, CMD_SET_DELAY,
- cpu_to_le16(delay), 0, NULL, 0) != 0) {
+ if (usb_write(&dev->adapter, CMD_SET_DELAY, delay, 0, NULL, 0) != 0) {
dev_err(&dev->adapter.dev,
"failure setting delay to %dus\n", delay);
retval = -EIO;
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 3d3fb00..5ba06d9 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1269,14 +1269,24 @@ static int i2c_detect_address(struct i2c_client *temp_client, int kind,
/* Make sure there is something at this address, unless forced */
if (kind < 0) {
- if (i2c_smbus_xfer(adapter, addr, 0, 0, 0,
- I2C_SMBUS_QUICK, NULL) < 0)
- return 0;
+ if (addr == 0x73 && (adapter->class & I2C_CLASS_HWMON)) {
+ /* Special probe for FSC hwmon chips */
+ union i2c_smbus_data dummy;
- /* prevent 24RF08 corruption */
- if ((addr & ~0x0f) == 0x50)
- i2c_smbus_xfer(adapter, addr, 0, 0, 0,
- I2C_SMBUS_QUICK, NULL);
+ if (i2c_smbus_xfer(adapter, addr, 0, I2C_SMBUS_READ, 0,
+ I2C_SMBUS_BYTE_DATA, &dummy) < 0)
+ return 0;
+ } else {
+ if (i2c_smbus_xfer(adapter, addr, 0, I2C_SMBUS_WRITE, 0,
+ I2C_SMBUS_QUICK, NULL) < 0)
+ return 0;
+
+ /* Prevent 24RF08 corruption */
+ if ((addr & ~0x0f) == 0x50)
+ i2c_smbus_xfer(adapter, addr, 0,
+ I2C_SMBUS_WRITE, 0,
+ I2C_SMBUS_QUICK, NULL);
+ }
}
/* Finally call the custom detection function */
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
index 4c3f124..342df4a 100644
--- a/drivers/scsi/megaraid/megaraid_sas.c
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -3292,6 +3292,7 @@ static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
compat_alloc_user_space(sizeof(struct megasas_iocpacket));
int i;
int error = 0;
+ compat_uptr_t ptr;
if (clear_user(ioc, sizeof(*ioc)))
return -EFAULT;
@@ -3304,9 +3305,22 @@ static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
return -EFAULT;
- for (i = 0; i < MAX_IOCTL_SGE; i++) {
- compat_uptr_t ptr;
+ /*
+ * The sense_ptr is used in megasas_mgmt_fw_ioctl only when
+ * sense_len is not null, so prepare the 64bit value under
+ * the same condition.
+ */
+ if (ioc->sense_len) {
+ void __user **sense_ioc_ptr =
+ (void __user **)(ioc->frame.raw + ioc->sense_off);
+ compat_uptr_t *sense_cioc_ptr =
+ (compat_uptr_t *)(cioc->frame.raw + cioc->sense_off);
+ if (get_user(ptr, sense_cioc_ptr) ||
+ put_user(compat_ptr(ptr), sense_ioc_ptr))
+ return -EFAULT;
+ }
+ for (i = 0; i < MAX_IOCTL_SGE; i++) {
if (get_user(ptr, &cioc->sgl[i].iov_base) ||
put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
copy_in_user(&ioc->sgl[i].iov_len,
diff --git a/drivers/usb/core/inode.c b/drivers/usb/core/inode.c
index 83887ff..2c3cdbd 100644
--- a/drivers/usb/core/inode.c
+++ b/drivers/usb/core/inode.c
@@ -510,13 +510,13 @@ static int fs_create_by_name (const char *name, mode_t mode,
*dentry = NULL;
mutex_lock(&parent->d_inode->i_mutex);
*dentry = lookup_one_len(name, parent, strlen(name));
- if (!IS_ERR(dentry)) {
+ if (!IS_ERR(*dentry)) {
if ((mode & S_IFMT) == S_IFDIR)
error = usbfs_mkdir (parent->d_inode, *dentry, mode);
else
error = usbfs_create (parent->d_inode, *dentry, mode);
} else
- error = PTR_ERR(dentry);
+ error = PTR_ERR(*dentry);
mutex_unlock(&parent->d_inode->i_mutex);
return error;
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 8b7c776..532f8cc 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -1754,6 +1754,44 @@ out:
return ret;
}
+int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
+ ext4_fsblk_t nblocks)
+{
+ s64 free_blocks, dirty_blocks;
+ ext4_fsblk_t root_blocks = 0;
+ struct percpu_counter *fbc = &sbi->s_freeblocks_counter;
+ struct percpu_counter *dbc = &sbi->s_dirtyblocks_counter;
+
+ free_blocks = percpu_counter_read_positive(fbc);
+ dirty_blocks = percpu_counter_read_positive(dbc);
+
+ if (!capable(CAP_SYS_RESOURCE) &&
+ sbi->s_resuid != current->fsuid &&
+ (sbi->s_resgid == 0 || !in_group_p(sbi->s_resgid)))
+ root_blocks = ext4_r_blocks_count(sbi->s_es);
+
+ if (free_blocks - (nblocks + root_blocks + dirty_blocks) <
+ EXT4_FREEBLOCKS_WATERMARK) {
+ free_blocks = percpu_counter_sum(fbc);
+ dirty_blocks = percpu_counter_sum(dbc);
+ if (dirty_blocks < 0) {
+ printk(KERN_CRIT "Dirty block accounting "
+ "went wrong %lld\n",
+ dirty_blocks);
+ }
+ }
+ /* Check whether we have space after
+ * accounting for current dirty blocks
+ */
+ if (free_blocks < ((s64)(root_blocks + nblocks) + dirty_blocks))
+ /* we don't have free space */
+ return -ENOSPC;
+
+ /* Add the blocks to nblocks */
+ percpu_counter_add(dbc, nblocks);
+ return 0;
+}
+
/**
* ext4_has_free_blocks()
* @sbi: in-core super block structure.
@@ -1766,27 +1804,31 @@ out:
ext4_fsblk_t ext4_has_free_blocks(struct ext4_sb_info *sbi,
ext4_fsblk_t nblocks)
{
- ext4_fsblk_t free_blocks;
+ ext4_fsblk_t free_blocks, dirty_blocks;
ext4_fsblk_t root_blocks = 0;
+ struct percpu_counter *fbc = &sbi->s_freeblocks_counter;
+ struct percpu_counter *dbc = &sbi->s_dirtyblocks_counter;
- free_blocks = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
+ free_blocks = percpu_counter_read_positive(fbc);
+ dirty_blocks = percpu_counter_read_positive(dbc);
if (!capable(CAP_SYS_RESOURCE) &&
sbi->s_resuid != current->fsuid &&
(sbi->s_resgid == 0 || !in_group_p(sbi->s_resgid)))
root_blocks = ext4_r_blocks_count(sbi->s_es);
-#ifdef CONFIG_SMP
- if (free_blocks - root_blocks < FBC_BATCH)
- free_blocks =
- percpu_counter_sum_and_set(&sbi->s_freeblocks_counter);
-#endif
- if (free_blocks <= root_blocks)
+
+ if (free_blocks - (nblocks + root_blocks + dirty_blocks) <
+ EXT4_FREEBLOCKS_WATERMARK) {
+ free_blocks = percpu_counter_sum_positive(fbc);
+ dirty_blocks = percpu_counter_sum_positive(dbc);
+ }
+ if (free_blocks <= (root_blocks + dirty_blocks))
/* we don't have free space */
return 0;
- if (free_blocks - root_blocks < nblocks)
+ if (free_blocks - (root_blocks + dirty_blocks) < nblocks)
return free_blocks - root_blocks;
return nblocks;
- }
+}
/**
@@ -1865,14 +1907,17 @@ ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode,
/*
* With delalloc we already reserved the blocks
*/
- *count = ext4_has_free_blocks(sbi, *count);
- }
- if (*count == 0) {
- *errp = -ENOSPC;
- return 0; /*return with ENOSPC error */
+ while (*count && ext4_claim_free_blocks(sbi, *count)) {
+ /* let others to free the space */
+ yield();
+ *count = *count >> 1;
+ }
+ if (!*count) {
+ *errp = -ENOSPC;
+ return 0; /*return with ENOSPC error */
+ }
+ num = *count;
}
- num = *count;
-
/*
* Check quota for allocation of this block.
*/
@@ -2067,9 +2112,14 @@ allocated:
le16_add_cpu(&gdp->bg_free_blocks_count, -num);
gdp->bg_checksum = ext4_group_desc_csum(sbi, group_no, gdp);
spin_unlock(sb_bgl_lock(sbi, group_no));
+ percpu_counter_sub(&sbi->s_freeblocks_counter, num);
+ /*
+ * Now reduce the dirty block count also. Should not go negative
+ */
if (!EXT4_I(inode)->i_delalloc_reserved_flag)
- percpu_counter_sub(&sbi->s_freeblocks_counter, num);
-
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter, *count);
+ else
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter, num);
if (sbi->s_log_groups_per_flex) {
ext4_group_t flex_group = ext4_flex_group(sbi, group_no);
spin_lock(sb_bgl_lock(sbi, flex_group));
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 1985721..7b666b2 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1015,6 +1015,8 @@ extern ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
unsigned long *count, int *errp);
extern ext4_fsblk_t ext4_old_new_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, unsigned long *count, int *errp);
+extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
+ ext4_fsblk_t nblocks);
extern ext4_fsblk_t ext4_has_free_blocks(struct ext4_sb_info *sbi,
ext4_fsblk_t nblocks);
extern void ext4_free_blocks (handle_t *handle, struct inode *inode,
@@ -1245,6 +1247,17 @@ do { \
__ext4_std_error((sb), __func__, (errno)); \
} while (0)
+#ifdef CONFIG_SMP
+/* Each CPU can accumulate FBC_BATCH blocks in their local
+ * counters. So we need to make sure we have free blocks more
+ * than FBC_BATCH * nr_cpu_ids. Also add a window of 4 times.
+ */
+#define EXT4_FREEBLOCKS_WATERMARK (4 * (FBC_BATCH * nr_cpu_ids))
+#else
+#define EXT4_FREEBLOCKS_WATERMARK 0
+#endif
+
+
/*
* Inodes and files operations
*/
diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h
index f20df8a..6d096d5 100644
--- a/fs/ext4/ext4_sb.h
+++ b/fs/ext4/ext4_sb.h
@@ -60,6 +60,7 @@ struct ext4_sb_info {
struct percpu_counter s_freeblocks_counter;
struct percpu_counter s_freeinodes_counter;
struct percpu_counter s_dirs_counter;
+ struct percpu_counter s_dirtyblocks_counter;
struct blockgroup_lock s_blockgroup_lock;
/* root of the per fs reservation window tree */
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index aeebfc2..a67f837 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1032,19 +1032,20 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used)
BUG_ON(mdb > EXT4_I(inode)->i_reserved_meta_blocks);
mdb_free = EXT4_I(inode)->i_reserved_meta_blocks - mdb;
- /* Account for allocated meta_blocks */
- mdb_free -= EXT4_I(inode)->i_allocated_meta_blocks;
-
- /* update fs free blocks counter for truncate case */
- percpu_counter_add(&sbi->s_freeblocks_counter, mdb_free);
+ if (mdb_free) {
+ /* Account for allocated meta_blocks */
+ mdb_free -= EXT4_I(inode)->i_allocated_meta_blocks;
+
+ /* update fs dirty blocks counter */
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter, mdb_free);
+ EXT4_I(inode)->i_allocated_meta_blocks = 0;
+ EXT4_I(inode)->i_reserved_meta_blocks = mdb;
+ }
/* update per-inode reservations */
BUG_ON(used > EXT4_I(inode)->i_reserved_data_blocks);
EXT4_I(inode)->i_reserved_data_blocks -= used;
- BUG_ON(mdb > EXT4_I(inode)->i_reserved_meta_blocks);
- EXT4_I(inode)->i_reserved_meta_blocks = mdb;
- EXT4_I(inode)->i_allocated_meta_blocks = 0;
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
/*
@@ -1548,6 +1549,7 @@ static int ext4_journalled_write_end(struct file *file,
static int ext4_da_reserve_space(struct inode *inode, int nrblocks)
{
+ int retries = 0;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
unsigned long md_needed, mdblocks, total = 0;
@@ -1556,6 +1558,7 @@ static int ext4_da_reserve_space(struct inode *inode, int nrblocks)
* in order to allocate nrblocks
* worse case is one extent per block
*/
+repeat:
spin_lock(&EXT4_I(inode)->i_block_reservation_lock);
total = EXT4_I(inode)->i_reserved_data_blocks + nrblocks;
mdblocks = ext4_calc_metadata_amount(inode, total);
@@ -1564,13 +1567,14 @@ static int ext4_da_reserve_space(struct inode *inode, int nrblocks)
md_needed = mdblocks - EXT4_I(inode)->i_reserved_meta_blocks;
total = md_needed + nrblocks;
- if (ext4_has_free_blocks(sbi, total) < total) {
+ if (ext4_claim_free_blocks(sbi, total)) {
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
+ if (ext4_should_retry_alloc(inode->i_sb, &retries)) {
+ yield();
+ goto repeat;
+ }
return -ENOSPC;
}
- /* reduce fs free blocks counter */
- percpu_counter_sub(&sbi->s_freeblocks_counter, total);
-
EXT4_I(inode)->i_reserved_data_blocks += nrblocks;
EXT4_I(inode)->i_reserved_meta_blocks = mdblocks;
@@ -1612,8 +1616,8 @@ static void ext4_da_release_space(struct inode *inode, int to_free)
release = to_free + mdb_free;
- /* update fs free blocks counter for truncate case */
- percpu_counter_add(&sbi->s_freeblocks_counter, release);
+ /* update fs dirty blocks counter for truncate case */
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter, release);
/* update per-inode reservations */
BUG_ON(to_free > EXT4_I(inode)->i_reserved_data_blocks);
@@ -1657,6 +1661,7 @@ struct mpage_da_data {
struct writeback_control *wbc;
int io_done;
long pages_written;
+ int retval;
};
/*
@@ -1694,17 +1699,23 @@ static int mpage_da_submit_io(struct mpage_da_data *mpd)
pagevec_init(&pvec, 0);
while (index <= end) {
- nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE);
+ /*
+ * We can use PAGECACHE_TAG_DIRTY lookup here because
+ * even though we have cleared the dirty flag on the page
+ * We still keep the page in the radix tree with tag
+ * PAGECACHE_TAG_DIRTY. See clear_page_dirty_for_io.
+ * The PAGECACHE_TAG_DIRTY is cleared in set_page_writeback
+ * which is called via the below writepage callback.
+ */
+ nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_DIRTY,
+ min(end - index,
+ (pgoff_t)PAGEVEC_SIZE-1) + 1);
if (nr_pages == 0)
break;
for (i = 0; i < nr_pages; i++) {
struct page *page = pvec.pages[i];
- index = page->index;
- if (index > end)
- break;
- index++;
-
BUG_ON(!PageLocked(page));
BUG_ON(PageWriteback(page));
@@ -1821,6 +1832,57 @@ static inline void __unmap_underlying_blocks(struct inode *inode,
unmap_underlying_metadata(bdev, bh->b_blocknr + i);
}
+static void ext4_da_block_invalidatepages(struct mpage_da_data *mpd,
+ sector_t logical, long blk_cnt)
+{
+ int nr_pages, i;
+ pgoff_t index, end;
+ struct pagevec pvec;
+ struct inode *inode = mpd->inode;
+ struct address_space *mapping = inode->i_mapping;
+
+ index = logical >> (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ end = (logical + blk_cnt - 1) >>
+ (PAGE_CACHE_SHIFT - inode->i_blkbits);
+ while (index <= end) {
+ nr_pages = pagevec_lookup(&pvec, mapping, index, PAGEVEC_SIZE);
+ if (nr_pages == 0)
+ break;
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+ index = page->index;
+ if (index > end)
+ break;
+ index++;
+
+ BUG_ON(!PageLocked(page));
+ BUG_ON(PageWriteback(page));
+ block_invalidatepage(page, 0);
+ ClearPageUptodate(page);
+ unlock_page(page);
+ }
+ }
+ return;
+}
+
+static void ext4_print_free_blocks(struct inode *inode)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+ printk(KERN_EMERG "Total free blocks count %lld\n",
+ ext4_count_free_blocks(inode->i_sb));
+ printk(KERN_EMERG "Free/Dirty block details\n");
+ printk(KERN_EMERG "free_blocks=%lld\n",
+ percpu_counter_sum(&sbi->s_freeblocks_counter));
+ printk(KERN_EMERG "dirty_blocks=%lld\n",
+ percpu_counter_sum(&sbi->s_dirtyblocks_counter));
+ printk(KERN_EMERG "Block reservation details\n");
+ printk(KERN_EMERG "i_reserved_data_blocks=%lu\n",
+ EXT4_I(inode)->i_reserved_data_blocks);
+ printk(KERN_EMERG "i_reserved_meta_blocks=%lu\n",
+ EXT4_I(inode)->i_reserved_meta_blocks);
+ return;
+}
+
/*
* mpage_da_map_blocks - go through given space
*
@@ -1830,32 +1892,69 @@ static inline void __unmap_underlying_blocks(struct inode *inode,
* The function skips space we know is already mapped to disk blocks.
*
*/
-static void mpage_da_map_blocks(struct mpage_da_data *mpd)
+static int mpage_da_map_blocks(struct mpage_da_data *mpd)
{
int err = 0;
- struct buffer_head *lbh = &mpd->lbh;
- sector_t next = lbh->b_blocknr;
struct buffer_head new;
+ struct buffer_head *lbh = &mpd->lbh;
+ sector_t next;
/*
* We consider only non-mapped and non-allocated blocks
*/
if (buffer_mapped(lbh) && !buffer_delay(lbh))
- return;
-
+ return 0;
new.b_state = lbh->b_state;
new.b_blocknr = 0;
new.b_size = lbh->b_size;
-
+ next = lbh->b_blocknr;
/*
* If we didn't accumulate anything
* to write simply return
*/
if (!new.b_size)
- return;
+ return 0;
err = mpd->get_block(mpd->inode, next, &new, 1);
- if (err)
- return;
+ if (err) {
+
+ /* If get block returns with error
+ * we simply return. Later writepage
+ * will redirty the page and writepages
+ * will find the dirty page again
+ */
+ if (err == -EAGAIN)
+ return 0;
+
+ if (err == -ENOSPC &&
+ ext4_count_free_blocks(mpd->inode->i_sb)) {
+ mpd->retval = err;
+ return 0;
+ }
+
+ /*
+ * get block failure will cause us
+ * to loop in writepages. Because
+ * a_ops->writepage won't be able to
+ * make progress. The page will be redirtied
+ * by writepage and writepages will again
+ * try to write the same.
+ */
+ printk(KERN_EMERG "%s block allocation failed for inode %lu "
+ "at logical offset %llu with max blocks "
+ "%zd with error %d\n",
+ __func__, mpd->inode->i_ino,
+ (unsigned long long)next,
+ lbh->b_size >> mpd->inode->i_blkbits, err);
+ printk(KERN_EMERG "This should not happen.!! "
+ "Data will be lost\n");
+ if (err == -ENOSPC) {
+ ext4_print_free_blocks(mpd->inode);
+ }
+ /* invlaidate all the pages */
+ ext4_da_block_invalidatepages(mpd, next,
+ lbh->b_size >> mpd->inode->i_blkbits);
+ return err;
+ }
BUG_ON(new.b_size == 0);
if (buffer_new(&new))
@@ -1868,7 +1967,7 @@ static void mpage_da_map_blocks(struct mpage_da_data *mpd)
if (buffer_delay(lbh) || buffer_unwritten(lbh))
mpage_put_bnr_to_bhs(mpd, next, &new);
- return;
+ return 0;
}
#define BH_FLAGS ((1 << BH_Uptodate) | (1 << BH_Mapped) | \
@@ -1937,8 +2036,8 @@ flush_it:
* We couldn't merge the block to our extent, so we
* need to flush current extent and start new one
*/
- mpage_da_map_blocks(mpd);
- mpage_da_submit_io(mpd);
+ if (mpage_da_map_blocks(mpd) == 0)
+ mpage_da_submit_io(mpd);
mpd->io_done = 1;
return;
}
@@ -1980,8 +2079,8 @@ static int __mpage_da_writepage(struct page *page,
* and start IO on them using writepage()
*/
if (mpd->next_page != mpd->first_page) {
- mpage_da_map_blocks(mpd);
- mpage_da_submit_io(mpd);
+ if (mpage_da_map_blocks(mpd) == 0)
+ mpage_da_submit_io(mpd);
/*
* skip rest of the page in the page_vec
*/
@@ -2074,39 +2173,36 @@ static int __mpage_da_writepage(struct page *page,
*/
static int mpage_da_writepages(struct address_space *mapping,
struct writeback_control *wbc,
- get_block_t get_block)
+ struct mpage_da_data *mpd)
{
- struct mpage_da_data mpd;
long to_write;
int ret;
- if (!get_block)
+ if (!mpd->get_block)
return generic_writepages(mapping, wbc);
- mpd.wbc = wbc;
- mpd.inode = mapping->host;
- mpd.lbh.b_size = 0;
- mpd.lbh.b_state = 0;
- mpd.lbh.b_blocknr = 0;
- mpd.first_page = 0;
- mpd.next_page = 0;
- mpd.get_block = get_block;
- mpd.io_done = 0;
- mpd.pages_written = 0;
+ mpd->lbh.b_size = 0;
+ mpd->lbh.b_state = 0;
+ mpd->lbh.b_blocknr = 0;
+ mpd->first_page = 0;
+ mpd->next_page = 0;
+ mpd->io_done = 0;
+ mpd->pages_written = 0;
+ mpd->retval = 0;
to_write = wbc->nr_to_write;
- ret = write_cache_pages(mapping, wbc, __mpage_da_writepage, &mpd);
+ ret = write_cache_pages(mapping, wbc, __mpage_da_writepage, mpd);
/*
* Handle last extent of pages
*/
- if (!mpd.io_done && mpd.next_page != mpd.first_page) {
- mpage_da_map_blocks(&mpd);
- mpage_da_submit_io(&mpd);
+ if (!mpd->io_done && mpd->next_page != mpd->first_page) {
+ if (mpage_da_map_blocks(mpd) == 0)
+ mpage_da_submit_io(mpd);
}
- wbc->nr_to_write = to_write - mpd.pages_written;
+ wbc->nr_to_write = to_write - mpd->pages_written;
return ret;
}
@@ -2352,7 +2448,7 @@ static int ext4_da_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
handle_t *handle = NULL;
- loff_t range_start = 0;
+ struct mpage_da_data mpd;
struct inode *inode = mapping->host;
int needed_blocks, ret = 0, nr_to_writebump = 0;
long to_write, pages_skipped = 0;
@@ -2390,16 +2486,12 @@ static int ext4_da_writepages(struct address_space *mapping,
wbc->nr_to_write = sbi->s_mb_stream_request;
}
- if (!wbc->range_cyclic)
- /*
- * If range_cyclic is not set force range_cont
- * and save the old writeback_index
- */
- wbc->range_cont = 1;
- range_start = wbc->range_start;
pages_skipped = wbc->pages_skipped;
+ mpd.wbc = wbc;
+ mpd.inode = mapping->host;
+
restart_loop:
to_write = wbc->nr_to_write;
while (!ret && to_write > 0) {
@@ -2435,11 +2527,17 @@ restart_loop:
goto out_writepages;
}
}
-
to_write -= wbc->nr_to_write;
- ret = mpage_da_writepages(mapping, wbc,
- ext4_da_get_block_write);
+
+ mpd.get_block = ext4_da_get_block_write;
+ ret = mpage_da_writepages(mapping, wbc, &mpd);
+
ext4_journal_stop(handle);
+
+ if (mpd.retval == -ENOSPC)
+ jbd2_journal_force_commit_nested(sbi->s_journal);
+
+ /* reset the retry count */
if (ret == MPAGE_DA_EXTENT_TAIL) {
/*
* got one extent now try with
@@ -2459,9 +2557,8 @@ restart_loop:
wbc->nr_to_write = to_write;
}
- if (wbc->range_cont && (pages_skipped != wbc->pages_skipped)) {
+ if (!wbc->range_cyclic && (pages_skipped != wbc->pages_skipped)) {
/* We skipped pages in this loop */
- wbc->range_start = range_start;
wbc->nr_to_write = to_write +
wbc->pages_skipped - pages_skipped;
wbc->pages_skipped = pages_skipped;
@@ -2470,7 +2567,6 @@ restart_loop:
out_writepages:
wbc->nr_to_write = to_write - nr_to_writebump;
- wbc->range_start = range_start;
return ret;
}
@@ -2488,7 +2584,6 @@ static int ext4_da_write_begin(struct file *file, struct address_space *mapping,
index = pos >> PAGE_CACHE_SHIFT;
from = pos & (PAGE_CACHE_SIZE - 1);
to = from + len;
-
retry:
/*
* With delayed allocation, we don't log the i_disksize update
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c7dc115..453589d 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3100,7 +3100,7 @@ void exit_ext4_mballoc(void)
*/
static noinline_for_stack int
ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
- handle_t *handle)
+ handle_t *handle, unsigned long reserv_blks)
{
struct buffer_head *bitmap_bh = NULL;
struct ext4_super_block *es;
@@ -3188,15 +3188,16 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
le16_add_cpu(&gdp->bg_free_blocks_count, -ac->ac_b_ex.fe_len);
gdp->bg_checksum = ext4_group_desc_csum(sbi, ac->ac_b_ex.fe_group, gdp);
spin_unlock(sb_bgl_lock(sbi, ac->ac_b_ex.fe_group));
-
+ percpu_counter_sub(&sbi->s_freeblocks_counter, ac->ac_b_ex.fe_len);
/*
- * free blocks account has already be reduced/reserved
- * at write_begin() time for delayed allocation
- * do not double accounting
+ * Now reduce the dirty block count also. Should not go negative
*/
if (!(ac->ac_flags & EXT4_MB_DELALLOC_RESERVED))
- percpu_counter_sub(&sbi->s_freeblocks_counter,
- ac->ac_b_ex.fe_len);
+ /* release all the reserved blocks if non delalloc */
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter, reserv_blks);
+ else
+ percpu_counter_sub(&sbi->s_dirtyblocks_counter,
+ ac->ac_b_ex.fe_len);
if (sbi->s_log_groups_per_flex) {
ext4_group_t flex_group = ext4_flex_group(sbi,
@@ -4630,12 +4631,13 @@ static int ext4_mb_discard_preallocations(struct super_block *sb, int needed)
ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
struct ext4_allocation_request *ar, int *errp)
{
+ int freed;
struct ext4_allocation_context *ac = NULL;
struct ext4_sb_info *sbi;
struct super_block *sb;
ext4_fsblk_t block = 0;
- int freed;
- int inquota;
+ unsigned long inquota;
+ unsigned long reserv_blks = 0;
sb = ar->inode->i_sb;
sbi = EXT4_SB(sb);
@@ -4649,14 +4651,17 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
/*
* With delalloc we already reserved the blocks
*/
- ar->len = ext4_has_free_blocks(sbi, ar->len);
- }
-
- if (ar->len == 0) {
- *errp = -ENOSPC;
- return 0;
+ while (ar->len && ext4_claim_free_blocks(sbi, ar->len)) {
+ /* let others to free the space */
+ yield();
+ ar->len = ar->len >> 1;
+ }
+ if (!ar->len) {
+ *errp = -ENOSPC;
+ return 0;
+ }
+ reserv_blks = ar->len;
}
-
while (ar->len && DQUOT_ALLOC_BLOCK(ar->inode, ar->len)) {
ar->flags |= EXT4_MB_HINT_NOPREALLOC;
ar->len--;
@@ -4701,7 +4706,7 @@ repeat:
ext4_mb_new_preallocation(ac);
}
if (likely(ac->ac_status == AC_STATUS_FOUND)) {
- *errp = ext4_mb_mark_diskspace_used(ac, handle);
+ *errp = ext4_mb_mark_diskspace_used(ac, handle, reserv_blks);
if (*errp == -EAGAIN) {
/*
* drop the reference that we took
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index baacaf8..2bca22d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -521,6 +521,7 @@ static void ext4_put_super(struct super_block *sb)
percpu_counter_destroy(&sbi->s_freeblocks_counter);
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
+ percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
brelse(sbi->s_sbh);
#ifdef CONFIG_QUOTA
for (i = 0; i < MAXQUOTAS; i++)
@@ -2280,6 +2281,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
err = percpu_counter_init(&sbi->s_dirs_counter,
ext4_count_dirs(sb));
}
+ if (!err) {
+ err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0);
+ }
if (err) {
printk(KERN_ERR "EXT4-fs: insufficient memory\n");
goto failed_mount3;
@@ -2517,6 +2521,7 @@ failed_mount3:
percpu_counter_destroy(&sbi->s_freeblocks_counter);
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
+ percpu_counter_destroy(&sbi->s_dirtyblocks_counter);
failed_mount2:
for (i = 0; i < db_count; i++)
brelse(sbi->s_group_desc[i]);
@@ -3208,7 +3213,8 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_type = EXT4_SUPER_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last;
- buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter);
+ buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) -
+ percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter);
ext4_free_blocks_count_set(es, buf->f_bfree);
buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es);
if (buf->f_bfree < ext4_r_blocks_count(es))
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 9d6a0e4..710645c 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -826,6 +826,8 @@ out_error:
static void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
{
target->flags = source->flags;
+ target->rsize = source->rsize;
+ target->wsize = source->wsize;
target->acregmin = source->acregmin;
target->acregmax = source->acregmax;
target->acdirmin = source->acdirmin;
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e195f67..ee7ed21 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -826,6 +826,8 @@ out_zap_parent:
/* If we have submounts, don't unhash ! */
if (have_submounts(dentry))
goto out_valid;
+ if (dentry->d_flags & DCACHE_DISCONNECTED)
+ goto out_valid;
shrink_dcache_parent(dentry);
}
d_drop(dentry);
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index abffc90..6203c81 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -179,10 +179,10 @@ static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
argp->p = page_address(argp->pagelist[0]);
argp->pagelist++;
if (argp->pagelen < PAGE_SIZE) {
- argp->end = p + (argp->pagelen>>2);
+ argp->end = argp->p + (argp->pagelen>>2);
argp->pagelen = 0;
} else {
- argp->end = p + (PAGE_SIZE>>2);
+ argp->end = argp->p + (PAGE_SIZE>>2);
argp->pagelen -= PAGE_SIZE;
}
memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
@@ -1115,10 +1115,10 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
argp->p = page_address(argp->pagelist[0]);
argp->pagelist++;
if (argp->pagelen < PAGE_SIZE) {
- argp->end = p + (argp->pagelen>>2);
+ argp->end = argp->p + (argp->pagelen>>2);
argp->pagelen = 0;
} else {
- argp->end = p + (PAGE_SIZE>>2);
+ argp->end = argp->p + (PAGE_SIZE>>2);
argp->pagelen -= PAGE_SIZE;
}
}
diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h
index 2083888..9007ccd 100644
--- a/include/linux/percpu_counter.h
+++ b/include/linux/percpu_counter.h
@@ -35,7 +35,7 @@ int percpu_counter_init_irq(struct percpu_counter *fbc, s64 amount);
void percpu_counter_destroy(struct percpu_counter *fbc);
void percpu_counter_set(struct percpu_counter *fbc, s64 amount);
void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch);
-s64 __percpu_counter_sum(struct percpu_counter *fbc, int set);
+s64 __percpu_counter_sum(struct percpu_counter *fbc);
static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
{
@@ -44,19 +44,13 @@ static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount)
static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc)
{
- s64 ret = __percpu_counter_sum(fbc, 0);
+ s64 ret = __percpu_counter_sum(fbc);
return ret < 0 ? 0 : ret;
}
-static inline s64 percpu_counter_sum_and_set(struct percpu_counter *fbc)
-{
- return __percpu_counter_sum(fbc, 1);
-}
-
-
static inline s64 percpu_counter_sum(struct percpu_counter *fbc)
{
- return __percpu_counter_sum(fbc, 0);
+ return __percpu_counter_sum(fbc);
}
static inline s64 percpu_counter_read(struct percpu_counter *fbc)
diff --git a/include/linux/security.h b/include/linux/security.h
index 1638afd..0601e71 100644
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -1590,6 +1590,7 @@ int security_syslog(int type);
int security_settime(struct timespec *ts, struct timezone *tz);
int security_vm_enough_memory(long pages);
int security_vm_enough_memory_mm(struct mm_struct *mm, long pages);
+int security_vm_enough_memory_kern(long pages);
int security_bprm_alloc(struct linux_binprm *bprm);
void security_bprm_free(struct linux_binprm *bprm);
void security_bprm_apply_creds(struct linux_binprm *bprm, int unsafe);
@@ -1822,14 +1823,23 @@ static inline int security_settime(struct timespec *ts, struct timezone *tz)
static inline int security_vm_enough_memory(long pages)
{
+ WARN_ON(current->mm == NULL);
return cap_vm_enough_memory(current->mm, pages);
}
static inline int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
{
+ WARN_ON(mm == NULL);
return cap_vm_enough_memory(mm, pages);
}
+static inline int security_vm_enough_memory_kern(long pages)
+{
+ /* If current->mm is a kernel thread then we will pass NULL,
+ for this specific case that is fine */
+ return cap_vm_enough_memory(current->mm, pages);
+}
+
static inline int security_bprm_alloc(struct linux_binprm *bprm)
{
return 0;
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index c2835bb..cc0e6d9 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -62,7 +62,6 @@ struct writeback_control {
unsigned for_writepages:1; /* This is a writepages() call */
unsigned range_cyclic:1; /* range_start is cyclic */
unsigned more_io:1; /* more io to be dispatched */
- unsigned range_cont:1;
};
/*
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index f8d9680..ae51d5e 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -124,11 +124,12 @@ int clockevents_program_event(struct clock_event_device *dev, ktime_t expires,
*/
int clockevents_register_notifier(struct notifier_block *nb)
{
+ unsigned long flags;
int ret;
- spin_lock(&clockevents_lock);
+ spin_lock_irqsave(&clockevents_lock, flags);
ret = raw_notifier_chain_register(&clockevents_chain, nb);
- spin_unlock(&clockevents_lock);
+ spin_unlock_irqrestore(&clockevents_lock, flags);
return ret;
}
@@ -165,6 +166,8 @@ static void clockevents_notify_released(void)
*/
void clockevents_register_device(struct clock_event_device *dev)
{
+ unsigned long flags;
+
BUG_ON(dev->mode != CLOCK_EVT_MODE_UNUSED);
/*
* A nsec2cyc multiplicator of 0 is invalid and we'd crash
@@ -175,13 +178,13 @@ void clockevents_register_device(struct clock_event_device *dev)
WARN_ON(1);
}
- spin_lock(&clockevents_lock);
+ spin_lock_irqsave(&clockevents_lock, flags);
list_add(&dev->list, &clockevent_devices);
clockevents_do_notify(CLOCK_EVT_NOTIFY_ADD, dev);
clockevents_notify_released();
- spin_unlock(&clockevents_lock);
+ spin_unlock_irqrestore(&clockevents_lock, flags);
}
/*
@@ -228,8 +231,9 @@ void clockevents_exchange_device(struct clock_event_device *old,
void clockevents_notify(unsigned long reason, void *arg)
{
struct list_head *node, *tmp;
+ unsigned long flags;
- spin_lock(&clockevents_lock);
+ spin_lock_irqsave(&clockevents_lock, flags);
clockevents_do_notify(reason, arg);
switch (reason) {
@@ -244,7 +248,7 @@ void clockevents_notify(unsigned long reason, void *arg)
default:
break;
}
- spin_unlock(&clockevents_lock);
+ spin_unlock_irqrestore(&clockevents_lock, flags);
}
EXPORT_SYMBOL_GPL(clockevents_notify);
#endif
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index cb01cd8..d1b3216 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -205,11 +205,11 @@ static void tick_handle_periodic_broadcast(struct clock_event_device *dev)
* Powerstate information: The system enters/leaves a state, where
* affected devices might stop
*/
-static void tick_do_broadcast_on_off(void *why)
+static void tick_do_broadcast_on_off(unsigned long *reason)
{
struct clock_event_device *bc, *dev;
struct tick_device *td;
- unsigned long flags, *reason = why;
+ unsigned long flags;
int cpu, bc_stopped;
spin_lock_irqsave(&tick_broadcast_lock, flags);
@@ -276,8 +276,7 @@ void tick_broadcast_on_off(unsigned long reason, int *oncpu)
printk(KERN_ERR "tick-broadcast: ignoring broadcast for "
"offline CPU #%d\n", *oncpu);
else
- smp_call_function_single(*oncpu, tick_do_broadcast_on_off,
- &reason, 1);
+ tick_do_broadcast_on_off(&reason);
}
/*
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8f3fb3d..dfe3995 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3018,7 +3018,6 @@ static int trace_free_page(void)
ClearPageLRU(page);
list_del(&page->lru);
tracing_pages_allocated--;
- tracing_pages_allocated--;
__free_page(page);
tracing_reset(data);
@@ -3036,6 +3035,7 @@ static int trace_free_page(void)
page = list_entry(p, struct page, lru);
ClearPageLRU(page);
list_del(&page->lru);
+ tracing_pages_allocated--;
__free_page(page);
tracing_reset(data);
diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c
index 4a8ba4b..a866389 100644
--- a/lib/percpu_counter.c
+++ b/lib/percpu_counter.c
@@ -52,7 +52,7 @@ EXPORT_SYMBOL(__percpu_counter_add);
* Add up all the per-cpu counts, return the result. This is a more accurate
* but much slower version of percpu_counter_read_positive()
*/
-s64 __percpu_counter_sum(struct percpu_counter *fbc, int set)
+s64 __percpu_counter_sum(struct percpu_counter *fbc)
{
s64 ret;
int cpu;
@@ -62,11 +62,9 @@ s64 __percpu_counter_sum(struct percpu_counter *fbc, int set)
for_each_online_cpu(cpu) {
s32 *pcount = per_cpu_ptr(fbc->counters, cpu);
ret += *pcount;
- if (set)
- *pcount = 0;
+ *pcount = 0;
}
- if (set)
- fbc->count = ret;
+ fbc->count = ret;
spin_unlock(&fbc->lock);
return ret;
diff --git a/mm/mmap.c b/mm/mmap.c
index 8b5aa8e..f3e5bfe 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -178,7 +178,8 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
/* Don't let a single process grow too big:
leave 3% of the size of this process for other processes */
- allowed -= mm->total_vm / 32;
+ if (mm)
+ allowed -= mm->total_vm / 32;
/*
* cast `allowed' as a signed long because vm_committed_space
diff --git a/mm/nommu.c b/mm/nommu.c
index 4bf7686..7122331 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1432,7 +1432,8 @@ int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin)
/* Don't let a single process grow too big:
leave 3% of the size of this process for other processes */
- allowed -= current->mm->total_vm / 32;
+ if (mm)
+ allowed -= mm->total_vm / 32;
/*
* cast `allowed' as a signed long because vm_committed_space
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 5f7cdc2..e5c4ca2 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1027,8 +1027,6 @@ continue_unlock:
if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
mapping->writeback_index = done_index;
- if (wbc->range_cont)
- wbc->range_start = index << PAGE_CACHE_SHIFT;
return ret;
}
EXPORT_SYMBOL(write_cache_pages);
diff --git a/mm/shmem.c b/mm/shmem.c
index 04fb4f1..c088da1 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -163,8 +163,8 @@ static inline struct shmem_sb_info *SHMEM_SB(struct super_block *sb)
*/
static inline int shmem_acct_size(unsigned long flags, loff_t size)
{
- return (flags & VM_ACCOUNT)?
- security_vm_enough_memory(VM_ACCT(size)): 0;
+ return (flags & VM_ACCOUNT) ?
+ security_vm_enough_memory_kern(VM_ACCT(size)) : 0;
}
static inline void shmem_unacct_size(unsigned long flags, loff_t size)
@@ -181,8 +181,8 @@ static inline void shmem_unacct_size(unsigned long flags, loff_t size)
*/
static inline int shmem_acct_block(unsigned long flags)
{
- return (flags & VM_ACCOUNT)?
- 0: security_vm_enough_memory(VM_ACCT(PAGE_CACHE_SIZE));
+ return (flags & VM_ACCOUNT) ?
+ 0 : security_vm_enough_memory_kern(VM_ACCT(PAGE_CACHE_SIZE));
}
static inline void shmem_unacct_blocks(unsigned long flags, long pages)
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index e46c825..4c772de 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -810,6 +810,11 @@ static void svc_age_temp_xprts(unsigned long closure)
void svc_delete_xprt(struct svc_xprt *xprt)
{
struct svc_serv *serv = xprt->xpt_server;
+ struct svc_deferred_req *dr;
+
+ /* Only do this once */
+ if (test_and_set_bit(XPT_DEAD, &xprt->xpt_flags))
+ return;
dprintk("svc: svc_delete_xprt(%p)\n", xprt);
xprt->xpt_ops->xpo_detach(xprt);
@@ -824,12 +829,16 @@ void svc_delete_xprt(struct svc_xprt *xprt)
* while still attached to a queue, the queue itself
* is about to be destroyed (in svc_destroy).
*/
- if (!test_and_set_bit(XPT_DEAD, &xprt->xpt_flags)) {
- BUG_ON(atomic_read(&xprt->xpt_ref.refcount) < 2);
- if (test_bit(XPT_TEMP, &xprt->xpt_flags))
- serv->sv_tmpcnt--;
+ if (test_bit(XPT_TEMP, &xprt->xpt_flags))
+ serv->sv_tmpcnt--;
+
+ for (dr = svc_deferred_dequeue(xprt); dr;
+ dr = svc_deferred_dequeue(xprt)) {
svc_xprt_put(xprt);
+ kfree(dr);
}
+
+ svc_xprt_put(xprt);
spin_unlock_bh(&serv->sv_lock);
}
@@ -875,17 +884,19 @@ static void svc_revisit(struct cache_deferred_req *dreq, int too_many)
container_of(dreq, struct svc_deferred_req, handle);
struct svc_xprt *xprt = dr->xprt;
- if (too_many) {
+ spin_lock(&xprt->xpt_lock);
+ set_bit(XPT_DEFERRED, &xprt->xpt_flags);
+ if (too_many || test_bit(XPT_DEAD, &xprt->xpt_flags)) {
+ spin_unlock(&xprt->xpt_lock);
+ dprintk("revisit canceled\n");
svc_xprt_put(xprt);
kfree(dr);
return;
}
dprintk("revisit queued\n");
dr->xprt = NULL;
- spin_lock(&xprt->xpt_lock);
list_add(&dr->handle.recent, &xprt->xpt_deferred);
spin_unlock(&xprt->xpt_lock);
- set_bit(XPT_DEFERRED, &xprt->xpt_flags);
svc_xprt_enqueue(xprt);
svc_xprt_put(xprt);
}
diff --git a/security/security.c b/security/security.c
index 27a315d..50b61ae 100644
--- a/security/security.c
+++ b/security/security.c
@@ -195,14 +195,23 @@ int security_settime(struct timespec *ts, struct timezone *tz)
int security_vm_enough_memory(long pages)
{
+ WARN_ON(current->mm == NULL);
return security_ops->vm_enough_memory(current->mm, pages);
}
int security_vm_enough_memory_mm(struct mm_struct *mm, long pages)
{
+ WARN_ON(mm == NULL);
return security_ops->vm_enough_memory(mm, pages);
}
+int security_vm_enough_memory_kern(long pages)
+{
+ /* If current->mm is a kernel thread then we will pass NULL,
+ for this specific case that is fine */
+ return security_ops->vm_enough_memory(current->mm, pages);
+}
+
int security_bprm_alloc(struct linux_binprm *bprm)
{
return security_ops->bprm_alloc_security(bprm);
diff --git a/sound/pci/mixart/mixart.c b/sound/pci/mixart/mixart.c
index 7e83131..62ebff5 100644
--- a/sound/pci/mixart/mixart.c
+++ b/sound/pci/mixart/mixart.c
@@ -1160,13 +1160,15 @@ static long snd_mixart_BA0_read(struct snd_info_entry *entry, void *file_private
unsigned long count, unsigned long pos)
{
struct mixart_mgr *mgr = entry->private_data;
+ unsigned long maxsize;
- count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
- if(count <= 0)
+ if (pos >= MIXART_BA0_SIZE)
return 0;
- if(pos + count > MIXART_BA0_SIZE)
- count = (long)(MIXART_BA0_SIZE - pos);
- if(copy_to_user_fromio(buf, MIXART_MEM( mgr, pos ), count))
+ maxsize = MIXART_BA0_SIZE - pos;
+ if (count > maxsize)
+ count = maxsize;
+ count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
+ if (copy_to_user_fromio(buf, MIXART_MEM(mgr, pos), count))
return -EFAULT;
return count;
}
@@ -1179,13 +1181,15 @@ static long snd_mixart_BA1_read(struct snd_info_entry *entry, void *file_private
unsigned long count, unsigned long pos)
{
struct mixart_mgr *mgr = entry->private_data;
+ unsigned long maxsize;
- count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
- if(count <= 0)
+ if (pos > MIXART_BA1_SIZE)
return 0;
- if(pos + count > MIXART_BA1_SIZE)
- count = (long)(MIXART_BA1_SIZE - pos);
- if(copy_to_user_fromio(buf, MIXART_REG( mgr, pos ), count))
+ maxsize = MIXART_BA1_SIZE - pos;
+ if (count > maxsize)
+ count = maxsize;
+ count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
+ if (copy_to_user_fromio(buf, MIXART_REG(mgr, pos), count))
return -EFAULT;
return count;
}
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: Linux 2.6.27.47
2010-05-26 22:23 Linux 2.6.27.47 Greg KH
2010-05-26 22:23 ` Greg KH
@ 2010-05-27 0:46 ` Grant Coady
1 sibling, 0 replies; 3+ messages in thread
From: Grant Coady @ 2010-05-27 0:46 UTC (permalink / raw)
To: Greg KH; +Cc: linux-kernel, Andrew Morton, torvalds, stable, lwn
On Wed, 26 May 2010 15:23:23 -0700, you wrote:
>I'm announcing the release of the 2.6.27.47 kernel. All users of the
>2.6.27 kernel series are very strongly encouraged to upgrade.
>
>The updated 2.6.27.y git tree can be found at:
> git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-2.6.27.y.git
>and can be browsed at the normal kernel.org git web browser:
> http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git;a=summary
Hi Greg,
Thank you :)
Grant.
--
http://bugs.id.au/
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2010-05-27 0:46 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-05-26 22:23 Linux 2.6.27.47 Greg KH
2010-05-26 22:23 ` Greg KH
2010-05-27 0:46 ` Grant Coady
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox