[PATCH 2/6] Documentation: add devicetree docs index file

[PATCH 2/6] Documentation: add devicetree docs index file

[Randy Dunlap]

From: Rob Landley <rlandley@parallels.com>

The device tree infrastructure is being genericized so its documentation moved
out of the PowerPC directory.

Signed-off-by: Rob Landley <rlandley@parallels.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
---

 Documentation/devicetree/00-INDEX |   10 ++++++++++
 Documentation/powerpc/00-INDEX    |    4 ----
 2 files changed, 10 insertions(+), 4 deletions(-)

--- /dev/null
+++ lnx-2638-rc8/Documentation/devicetree/00-INDEX
@@ -0,0 +1,10 @@
+Documentation for device trees, a data structure by which bootloaders pass
+hardware layout to Linux in a device-independent manner, simplifying hardware
+probing.  This subsystem is maintained by Grant Likely
+<grant.likely@secretlab.ca> and has a mailing list at
+https://lists.ozlabs.org/listinfo/devicetree-discuss
+
+00-INDEX
+	- this file
+booting-without-of.txt
+	- Booting Linux without Open Firmware, describes history and format of device trees.
--- lnx-2638-rc8.orig/Documentation/powerpc/00-INDEX
+++ lnx-2638-rc8/Documentation/powerpc/00-INDEX
@@ -5,8 +5,6 @@ please mail me.
 
 00-INDEX
 	- this file
-booting-without-of.txt
-	- Booting the Linux/ppc kernel without Open Firmware
 cpu_features.txt
 	- info on how we support a variety of CPUs with minimal compile-time
 	options.
@@ -16,8 +14,6 @@ hvcs.txt
 	- IBM "Hypervisor Virtual Console Server" Installation Guide
 mpc52xx.txt
 	- Linux 2.6.x on MPC52xx family
-mpc52xx-device-tree-bindings.txt
-	- MPC5200 Device Tree Bindings
 sound.txt
 	- info on sound support under Linux/PPC
 zImage_layout.txt

[PATCH 3/6] Documentation: update header filename in CodingStyle

[Randy Dunlap]

From: Roland Kammerer <dev.rck@gmail.com>

pr_info() and pr_debug() are in linux/printk.h, not linux/kernel.h.
Last updated is unnecessary, we have git for that.

Signed-off-by: Roland Kammerer <dev.rck@gmail.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
---
 Documentation/CodingStyle |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- lnx-2638-rc8.orig/Documentation/CodingStyle
+++ lnx-2638-rc8/Documentation/CodingStyle
@@ -659,7 +659,7 @@ There are a number of driver model diagn
 which you should use to make sure messages are matched to the right device
 and driver, and are tagged with the right level:  dev_err(), dev_warn(),
 dev_info(), and so forth.  For messages that aren't associated with a
-particular device, <linux/kernel.h> defines pr_debug() and pr_info().
+particular device, <linux/printk.h> defines pr_debug() and pr_info().
 
 Coming up with good debugging messages can be quite a challenge; and once
 you have them, they can be a huge help for remote troubleshooting.  Such
@@ -819,6 +819,3 @@ language C, URL: http://www.open-std.org
 Kernel CodingStyle, by greg@kroah.com at OLS 2002:
 http://www.kroah.com/linux/talks/ols_2002_kernel_codingstyle_talk/html/
 
---
-Last updated on 2007-July-13.
-

[PATCH 4/6] Documentation: file handles are now freed

[Randy Dunlap]

From: Federica Teodori <federica.teodori@googlemail.com>

Since file handles are freed, a little amendment to the documentation

Signed-off-by: Federica Teodori <federica.teodori@googlemail.com>
Acked-by: Rik van Riel<riel@redhat.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
---
 Documentation/sysctl/fs.txt |   17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

--- lnx-2638-rc8.orig/Documentation/sysctl/fs.txt
+++ lnx-2638-rc8/Documentation/sysctl/fs.txt
@@ -88,20 +88,19 @@ you might want to raise the limit.
 
 file-max & file-nr:
 
-The kernel allocates file handles dynamically, but as yet it
-doesn't free them again.
-
 The value in file-max denotes the maximum number of file-
 handles that the Linux kernel will allocate. When you get lots
 of error messages about running out of file handles, you might
 want to increase this limit.
 
-Historically, the three values in file-nr denoted the number of
-allocated file handles, the number of allocated but unused file
-handles, and the maximum number of file handles. Linux 2.6 always
-reports 0 as the number of free file handles -- this is not an
-error, it just means that the number of allocated file handles
-exactly matches the number of used file handles.
+Historically,the kernel was able to allocate file handles
+dynamically, but not to free them again. The three values in
+file-nr denote the number of allocated file handles, the number
+of allocated but unused file handles, and the maximum number of
+file handles. Linux 2.6 always reports 0 as the number of free
+file handles -- this is not an error, it just means that the
+number of allocated file handles exactly matches the number of
+used file handles.
 
 Attempts to allocate more file descriptors than file-max are
 reported with printk, look for "VFS: file-max limit <number>

[PATCH 5/6] Documentation: update cgroup pid and cpuset information

[Randy Dunlap]

From: Eric B Munson <emunson@mgebm.net>

The cgroup documentation does not specify how a process can be removed from a
particular group.  This patch adds a note at the end of the simple example
about how this is done.  Also, some cgroups (like cpusets) require user input
before a new group can be used.  This is noted in the patch as well.

Signed-off-by: Eric B Munson <emunson@mgebm.net>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
---
Changes from V1:
 Rework the note about removing a process from a cgroup
 Add note about ns cgroup causing failure when moving processes between groups

 Documentation/cgroups/cgroups.txt |   12 ++++++++++++
 1 file changed, 12 insertions(+)

--- lnx-2638-rc8.orig/Documentation/cgroups/cgroups.txt
+++ lnx-2638-rc8/Documentation/cgroups/cgroups.txt
@@ -349,6 +349,10 @@ To mount a cgroup hierarchy with all ava
 The "xxx" is not interpreted by the cgroup code, but will appear in
 /proc/mounts so may be any useful identifying string that you like.
 
+Note: Some subsystems do not work without some user input first.  For instance,
+if cpusets are enabled the user will have to populate the cpus and mems files
+for each new cgroup created before that group can be used.
+
 To mount a cgroup hierarchy with just the cpuset and memory
 subsystems, type:
 # mount -t cgroup -o cpuset,memory hier1 /dev/cgroup
@@ -426,6 +430,14 @@ You can attach the current shell task by
 
 # echo 0 > tasks
 
+Note: Since every task is always a member of exactly one cgroup in each
+mounted hierarchy, to remove a task from its current cgroup you must
+move it into a new cgroup (possibly the root cgroup) by writing to the
+new cgroup's tasks file.
+
+Note: If the ns cgroup is active, moving a process to another cgroup can
+fail.
+
 2.3 Mounting hierarchies by name
 --------------------------------
 

[PATCH 6/6] sched.c: fix kernel-doc for runqueue_is_locked()

[Randy Dunlap]

From: Randy Dunlap <randy.dunlap@oracle.com>

Fix kernel-doc warning for runqueue_is_locked():

Warning(kernel/sched.c:664): missing initial short description on line:

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Ingo Molnar <mingo@elte.hu>
---
 kernel/sched.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- lnx-2638-rc8.orig/kernel/sched.c
+++ lnx-2638-rc8/kernel/sched.c
@@ -664,10 +664,9 @@ static void update_rq_clock(struct rq *r
 #endif
 
 /**
- * runqueue_is_locked
+ * runqueue_is_locked - Returns true if the current cpu runqueue is locked
  * @cpu: the processor in question.
  *
- * Returns true if the current cpu runqueue is locked.
  * This interface allows printk to be called with the runqueue lock
  * held and know whether or not it is OK to wake up the klogd.
  */

Re: [PATCH 3/6] Documentation: update header filename in CodingStyle

[Harry Wei]

On Tue, Mar 15, 2011 at 04:11:52PM -0700, Randy Dunlap wrote:
> From: Roland Kammerer <dev.rck@gmail.com>
> 
> pr_info() and pr_debug() are in linux/printk.h, not linux/kernel.h.
> Last updated is unnecessary, we have git for that.
> 
> Signed-off-by: Roland Kammerer <dev.rck@gmail.com>
> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Harry Wei <harryxiyou@gmail.com>
> ---
>  Documentation/CodingStyle |    5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> --- lnx-2638-rc8.orig/Documentation/CodingStyle
> +++ lnx-2638-rc8/Documentation/CodingStyle
> @@ -659,7 +659,7 @@ There are a number of driver model diagn
>  which you should use to make sure messages are matched to the right device
>  and driver, and are tagged with the right level:  dev_err(), dev_warn(),
>  dev_info(), and so forth.  For messages that aren't associated with a
> -particular device, <linux/kernel.h> defines pr_debug() and pr_info().
> +particular device, <linux/printk.h> defines pr_debug() and pr_info().
>  
>  Coming up with good debugging messages can be quite a challenge; and once
>  you have them, they can be a huge help for remote troubleshooting.  Such
> @@ -819,6 +819,3 @@ language C, URL: http://www.open-std.org
>  Kernel CodingStyle, by greg@kroah.com at OLS 2002:
>  http://www.kroah.com/linux/talks/ols_2002_kernel_codingstyle_talk/html/
>  
> ---
> -Last updated on 2007-July-13.
> -
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

[tip:sched/urgent] sched, kernel-doc: Fix runqueue_is_locked() description

[tip-bot for Randy Dunlap]

Commit-ID:  58cbe2476abce8b5e3508d23bd05c2e2e8c394da
Gitweb:     http://git.kernel.org/tip/58cbe2476abce8b5e3508d23bd05c2e2e8c394da
Author:     Randy Dunlap <randy.dunlap@oracle.com>
AuthorDate: Tue, 15 Mar 2011 16:12:30 -0700
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 16 Mar 2011 14:00:23 +0100

sched, kernel-doc: Fix runqueue_is_locked() description

Fix kernel-doc warning for runqueue_is_locked():

  Warning(kernel/sched.c:664): missing initial short description

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <20110315161230.c4e1e8e3.rdunlap@xenotime.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 kernel/sched.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index c8e40b7..58d66ea 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -661,10 +661,9 @@ static void update_rq_clock(struct rq *rq)
 #endif
 
 /**
- * runqueue_is_locked
+ * runqueue_is_locked - Returns true if the current cpu runqueue is locked
  * @cpu: the processor in question.
  *
- * Returns true if the current cpu runqueue is locked.
  * This interface allows printk to be called with the runqueue lock
  * held and know whether or not it is OK to wake up the klogd.
  */