---

yaml
---
r: 252258
b: refs/heads/master
c: bdf7cf1
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ac04fee0b5c55bbac0858727a4154110b55d3f5a
+refs/heads/master: bdf7cf1c83872a0586ce4c4da6889103cc36dbd3

trunk/Documentation/ABI/obsolete/o2cb → trunk/Documentation/ABI/removed/o2cb

@@ -1,11 +1,10 @@
 What:		/sys/o2cb symlink
-Date:		Dec 2005
-KernelVersion:	2.6.16
+Date:		May 2011
+KernelVersion:	2.6.40
 Contact:	ocfs2-devel@oss.oracle.com
-Description:	This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink will
-		be removed when new versions of ocfs2-tools which know to look
+Description:	This is a symlink: /sys/o2cb to /sys/fs/o2cb. The symlink is
+		removed when new versions of ocfs2-tools which know to look
 		in /sys/fs/o2cb are sufficiently prevalent. Don't code new
 		software to look here, it should try /sys/fs/o2cb instead.
-		See Documentation/ABI/stable/o2cb for more information on usage.
 Users:		ocfs2-tools. It's sufficient to mail proposed changes to
 		ocfs2-devel@oss.oracle.com.

trunk/Documentation/ABI/testing/sysfs-kernel-mm-cleancache

@@ -0,0 +1,11 @@
+What:		/sys/kernel/mm/cleancache/
+Date:		April 2011
+Contact:	Dan Magenheimer <dan.magenheimer@oracle.com>
+Description:
+		/sys/kernel/mm/cleancache/ contains a number of files which
+		record a count of various cleancache operations
+		(sum across all filesystems):
+			succ_gets
+			failed_gets
+			puts
+			flushes

trunk/Documentation/DocBook/dvb/dvbproperty.xml

@@ -141,13 +141,15 @@ struct dtv_properties {
  </row></tbody></tgroup></informaltable>
 </section>
 
+<section>
+	<title>Property types</title>
 <para>
 On <link linkend="FE_GET_PROPERTY">FE_GET_PROPERTY</link>/<link linkend="FE_SET_PROPERTY">FE_SET_PROPERTY</link>,
 the actual action is determined by the dtv_property cmd/data pairs. With one single ioctl, is possible to
 get/set up to 64 properties. The actual meaning of each property is described on the next sections.
 </para>
 
-<para>The Available frontend property types are:</para>
+<para>The available frontend property types are:</para>
 <programlisting>
 #define DTV_UNDEFINED		0
 #define DTV_TUNE		1
@@ -193,6 +195,7 @@ get/set up to 64 properties. The actual meaning of each property is described on
 #define DTV_ISDBT_LAYER_ENABLED	41
 #define DTV_ISDBS_TS_ID		42
 </programlisting>
+</section>
 
 <section id="fe_property_common">
 	<title>Parameters that are common to all Digital TV standards</title>

trunk/Documentation/DocBook/media-entities.tmpl

@@ -293,6 +293,7 @@
 <!ENTITY sub-yuyv SYSTEM "v4l/pixfmt-yuyv.xml">
 <!ENTITY sub-yvyu SYSTEM "v4l/pixfmt-yvyu.xml">
 <!ENTITY sub-srggb10 SYSTEM "v4l/pixfmt-srggb10.xml">
+<!ENTITY sub-srggb12 SYSTEM "v4l/pixfmt-srggb12.xml">
 <!ENTITY sub-srggb8 SYSTEM "v4l/pixfmt-srggb8.xml">
 <!ENTITY sub-y10 SYSTEM "v4l/pixfmt-y10.xml">
 <!ENTITY sub-y12 SYSTEM "v4l/pixfmt-y12.xml">
@@ -373,9 +374,9 @@
 <!ENTITY sub-media-indices SYSTEM "media-indices.tmpl">
 
 <!ENTITY sub-media-controller SYSTEM "v4l/media-controller.xml">
-<!ENTITY sub-media-open SYSTEM "v4l/media-func-open.xml">
-<!ENTITY sub-media-close SYSTEM "v4l/media-func-close.xml">
-<!ENTITY sub-media-ioctl SYSTEM "v4l/media-func-ioctl.xml">
+<!ENTITY sub-media-func-open SYSTEM "v4l/media-func-open.xml">
+<!ENTITY sub-media-func-close SYSTEM "v4l/media-func-close.xml">
+<!ENTITY sub-media-func-ioctl SYSTEM "v4l/media-func-ioctl.xml">
 <!ENTITY sub-media-ioc-device-info SYSTEM "v4l/media-ioc-device-info.xml">
 <!ENTITY sub-media-ioc-enum-entities SYSTEM "v4l/media-ioc-enum-entities.xml">
 <!ENTITY sub-media-ioc-enum-links SYSTEM "v4l/media-ioc-enum-links.xml">

trunk/Documentation/DocBook/v4l/media-controller.xml

@@ -78,9 +78,9 @@
 <appendix id="media-user-func">
   <title>Function Reference</title>
   <!-- Keep this alphabetically sorted. -->
-  &sub-media-open;
-  &sub-media-close;
-  &sub-media-ioctl;
+  &sub-media-func-open;
+  &sub-media-func-close;
+  &sub-media-func-ioctl;
   <!-- All ioctls go here. -->
   &sub-media-ioc-device-info;
   &sub-media-ioc-enum-entities;

trunk/Documentation/DocBook/v4l/pixfmt.xml

@@ -673,6 +673,7 @@ access the palette, this must be done with ioctls of the Linux framebuffer API.<
     &sub-srggb8;
     &sub-sbggr16;
     &sub-srggb10;
+    &sub-srggb12;
   </section>
 
   <section id="yuv-formats">

trunk/Documentation/DocBook/v4l/subdev-formats.xml

@@ -2531,13 +2531,13 @@
 	<constant>_JPEG</constant> prefix the format code is made of
 	the following information.
 	<itemizedlist>
-	  <listitem>The number of bus samples per entropy encoded byte.</listitem>
-	  <listitem>The bus width.</listitem>
+	  <listitem><para>The number of bus samples per entropy encoded byte.</para></listitem>
+	  <listitem><para>The bus width.</para></listitem>
 	</itemizedlist>
+      </para>
 
-	<para>For instance, for a JPEG baseline process and an 8-bit bus width
-	  the format will be named <constant>V4L2_MBUS_FMT_JPEG_1X8</constant>.
-	</para>
+      <para>For instance, for a JPEG baseline process and an 8-bit bus width
+        the format will be named <constant>V4L2_MBUS_FMT_JPEG_1X8</constant>.
       </para>
 
       <para>The following table lists existing JPEG compressed formats.</para>

trunk/Documentation/accounting/getdelays.c

@@ -177,6 +177,8 @@ static int get_family_id(int sd)
 	rc = send_cmd(sd, GENL_ID_CTRL, getpid(), CTRL_CMD_GETFAMILY,
 			CTRL_ATTR_FAMILY_NAME, (void *)name,
 			strlen(TASKSTATS_GENL_NAME)+1);
+	if (rc < 0)
+		return 0;	/* sendto() failure? */
 
 	rep_len = recv(sd, &ans, sizeof(ans), 0);
 	if (ans.n.nlmsg_type == NLMSG_ERROR ||
@@ -191,30 +193,37 @@ static int get_family_id(int sd)
 	return id;
 }
 
+#define average_ms(t, c) (t / 1000000ULL / (c ? c : 1))
+
 static void print_delayacct(struct taskstats *t)
 {
-	printf("\n\nCPU   %15s%15s%15s%15s\n"
-	       "      %15llu%15llu%15llu%15llu\n"
-	       "IO    %15s%15s\n"
-	       "      %15llu%15llu\n"
-	       "SWAP  %15s%15s\n"
-	       "      %15llu%15llu\n"
-	       "RECLAIM  %12s%15s\n"
-	       "      %15llu%15llu\n",
-	       "count", "real total", "virtual total", "delay total",
+	printf("\n\nCPU   %15s%15s%15s%15s%15s\n"
+	       "      %15llu%15llu%15llu%15llu%15.3fms\n"
+	       "IO    %15s%15s%15s\n"
+	       "      %15llu%15llu%15llums\n"
+	       "SWAP  %15s%15s%15s\n"
+	       "      %15llu%15llu%15llums\n"
+	       "RECLAIM  %12s%15s%15s\n"
+	       "      %15llu%15llu%15llums\n",
+	       "count", "real total", "virtual total",
+	       "delay total", "delay average",
 	       (unsigned long long)t->cpu_count,
 	       (unsigned long long)t->cpu_run_real_total,
 	       (unsigned long long)t->cpu_run_virtual_total,
 	       (unsigned long long)t->cpu_delay_total,
-	       "count", "delay total",
+	       average_ms((double)t->cpu_delay_total, t->cpu_count),
+	       "count", "delay total", "delay average",
 	       (unsigned long long)t->blkio_count,
 	       (unsigned long long)t->blkio_delay_total,
-	       "count", "delay total",
+	       average_ms(t->blkio_delay_total, t->blkio_count),
+	       "count", "delay total", "delay average",
 	       (unsigned long long)t->swapin_count,
 	       (unsigned long long)t->swapin_delay_total,
-	       "count", "delay total",
+	       average_ms(t->swapin_delay_total, t->swapin_count),
+	       "count", "delay total", "delay average",
 	       (unsigned long long)t->freepages_count,
-	       (unsigned long long)t->freepages_delay_total);
+	       (unsigned long long)t->freepages_delay_total,
+	       average_ms(t->freepages_delay_total, t->freepages_count));
 }
 
 static void task_context_switch_counts(struct taskstats *t)
@@ -433,8 +442,6 @@ int main(int argc, char *argv[])
 	}
 
 	do {
-		int i;
-
 		rep_len = recv(nl_sd, &msg, sizeof(msg), 0);
 		PRINTF("received %d bytes\n", rep_len);
 
@@ -459,7 +466,6 @@ int main(int argc, char *argv[])
 
 		na = (struct nlattr *) GENLMSG_DATA(&msg);
 		len = 0;
-		i = 0;
 		while (len < rep_len) {
 			len += NLA_ALIGN(na->nla_len);
 			switch (na->nla_type) {

trunk/Documentation/atomic_ops.txt

@@ -12,7 +12,7 @@ Also, it should be made opaque such that any kind of cast to a normal
 C integer type will fail.  Something like the following should
 suffice:
 
-	typedef struct { volatile int counter; } atomic_t;
+	typedef struct { int counter; } atomic_t;
 
 Historically, counter has been declared volatile.  This is now discouraged.
 See Documentation/volatile-considered-harmful.txt for the complete rationale.

trunk/Documentation/cgroups/cgroups.txt

@@ -236,7 +236,8 @@ containing the following files describing that cgroup:
  - cgroup.procs: list of tgids in the cgroup.  This list is not
    guaranteed to be sorted or free of duplicate tgids, and userspace
    should sort/uniquify the list if this property is required.
-   This is a read-only file, for now.
+   Writing a thread group id into this file moves all threads in that
+   group into this cgroup.
  - notify_on_release flag: run the release agent on exit?
  - release_agent: the path to use for release notifications (this file
    exists in the top cgroup only)
@@ -430,6 +431,12 @@ You can attach the current shell task by echoing 0:
 
 # echo 0 > tasks
 
+You can use the cgroup.procs file instead of the tasks file to move all
+threads in a threadgroup at once. Echoing the pid of any task in a
+threadgroup to cgroup.procs causes all tasks in that threadgroup to be
+be attached to the cgroup. Writing 0 to cgroup.procs moves all tasks
+in the writing task's threadgroup.
+
 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
@@ -575,7 +582,7 @@ rmdir() will fail with it. From this behavior, pre_destroy() can be
 called multiple times against a cgroup.
 
 int can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
-	       struct task_struct *task, bool threadgroup)
+	       struct task_struct *task)
 (cgroup_mutex held by caller)
 
 Called prior to moving a task into a cgroup; if the subsystem
@@ -584,9 +591,14 @@ task is passed, then a successful result indicates that *any*
 unspecified task can be moved into the cgroup. Note that this isn't
 called on a fork. If this method returns 0 (success) then this should
 remain valid while the caller holds cgroup_mutex and it is ensured that either
-attach() or cancel_attach() will be called in future. If threadgroup is
-true, then a successful result indicates that all threads in the given
-thread's threadgroup can be moved together.
+attach() or cancel_attach() will be called in future.
+
+int can_attach_task(struct cgroup *cgrp, struct task_struct *tsk);
+(cgroup_mutex held by caller)
+
+As can_attach, but for operations that must be run once per task to be
+attached (possibly many when using cgroup_attach_proc). Called after
+can_attach.
 
 void cancel_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
 	       struct task_struct *task, bool threadgroup)
@@ -598,15 +610,24 @@ function, so that the subsystem can implement a rollback. If not, not necessary.
 This will be called only about subsystems whose can_attach() operation have
 succeeded.
 
+void pre_attach(struct cgroup *cgrp);
+(cgroup_mutex held by caller)
+
+For any non-per-thread attachment work that needs to happen before
+attach_task. Needed by cpuset.
+
 void attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
-	    struct cgroup *old_cgrp, struct task_struct *task,
-	    bool threadgroup)
+	    struct cgroup *old_cgrp, struct task_struct *task)
 (cgroup_mutex held by caller)
 
 Called after the task has been attached to the cgroup, to allow any
 post-attachment activity that requires memory allocations or blocking.
-If threadgroup is true, the subsystem should take care of all threads
-in the specified thread's threadgroup. Currently does not support any
+
+void attach_task(struct cgroup *cgrp, struct task_struct *tsk);
+(cgroup_mutex held by caller)
+
+As attach, but for operations that must be run once per task to be attached,
+like can_attach_task. Called before attach. Currently does not support any
 subsystem that might need the old_cgrp for every thread in the group.
 
 void fork(struct cgroup_subsy *ss, struct task_struct *task)
@@ -630,7 +651,7 @@ always handled well.
 void post_clone(struct cgroup_subsys *ss, struct cgroup *cgrp)
 (cgroup_mutex held by caller)
 
-Called at the end of cgroup_clone() to do any parameter
+Called during cgroup_create() to do any parameter
 initialization which might be required before a task could attach.  For
 example in cpusets, no task may attach before 'cpus' and 'mems' are set
 up.

trunk/Documentation/feature-removal-schedule.txt

@@ -262,16 +262,6 @@ Who:	Michael Buesch <mb@bu3sch.de>
 
 ---------------------------
 
-What:	/sys/o2cb symlink
-When:	January 2010
-Why:	/sys/fs/o2cb is the proper location for this information - /sys/o2cb
-	exists as a symlink for backwards compatibility for old versions of
-	ocfs2-tools. 2 years should be sufficient time to phase in new versions
-	which know to look in /sys/fs/o2cb.
-Who:	ocfs2-devel@oss.oracle.com
-
----------------------------
-
 What:	Ability for non root users to shm_get hugetlb pages based on mlock
 	resource limits
 When:	2.6.31

trunk/Documentation/filesystems/configfs/configfs_example_explicit.c

@@ -464,9 +464,8 @@ static int __init configfs_example_init(void)
 	return 0;
 
 out_unregister:
-	for (; i >= 0; i--) {
+	for (i--; i >= 0; i--)
 		configfs_unregister_subsystem(example_subsys[i]);
-	}
 
 	return ret;
 }
@@ -475,9 +474,8 @@ static void __exit configfs_example_exit(void)
 {
 	int i;
 
-	for (i = 0; example_subsys[i]; i++) {
+	for (i = 0; example_subsys[i]; i++)
 		configfs_unregister_subsystem(example_subsys[i]);
-	}
 }
 
 module_init(configfs_example_init);

trunk/Documentation/filesystems/configfs/configfs_example_macros.c

@@ -427,9 +427,8 @@ static int __init configfs_example_init(void)
 	return 0;
 
 out_unregister:
-	for (; i >= 0; i--) {
+	for (i--; i >= 0; i--)
 		configfs_unregister_subsystem(example_subsys[i]);
-	}
 
 	return ret;
 }
@@ -438,9 +437,8 @@ static void __exit configfs_example_exit(void)
 {
 	int i;
 
-	for (i = 0; example_subsys[i]; i++) {
+	for (i = 0; example_subsys[i]; i++)
 		configfs_unregister_subsystem(example_subsys[i]);
-	}
 }
 
 module_init(configfs_example_init);

trunk/Documentation/filesystems/ext4.txt

@@ -226,10 +226,6 @@ acl			Enables POSIX Access Control Lists support.
 noacl			This option disables POSIX Access Control List
 			support.
 
-reservation
-
-noreservation
-
 bsddf		(*)	Make 'df' act like BSD.
 minixdf			Make 'df' act like Minix.
 

trunk/Documentation/filesystems/ocfs2.txt

@@ -46,9 +46,15 @@ errors=panic		Panic and halt the machine if an error occurs.
 intr		(*)	Allow signals to interrupt cluster operations.
 nointr			Do not allow signals to interrupt cluster
 			operations.
+noatime			Do not update access time.
+relatime(*)		Update atime if the previous atime is older than
+			mtime or ctime
+strictatime		Always update atime, but the minimum update interval
+			is specified by atime_quantum.
 atime_quantum=60(*)	OCFS2 will not update atime unless this number
 			of seconds has passed since the last update.
-			Set to zero to always update atime.
+			Set to zero to always update atime. This option need
+			work with strictatime.
 data=ordered	(*)	All data are forced directly out to the main file
 			system prior to its metadata being committed to the
 			journal.

trunk/Documentation/filesystems/xfs.txt

@@ -39,6 +39,12 @@ When mounting an XFS filesystem, the following options are accepted.
 	drive level write caching to be enabled, for devices that
 	support write barriers.
 
+  discard
+	Issue command to let the block device reclaim space freed by the
+	filesystem.  This is useful for SSD devices, thinly provisioned
+	LUNs and virtual machine images, but may have a performance
+	impact.  This option is incompatible with the nodelaylog option.
+
   dmapi
 	Enable the DMAPI (Data Management API) event callouts.
 	Use with the "mtpt" option.