---

yaml
---
r: 260157
b: refs/heads/master
c: 284d952
h: refs/heads/master
i:
  260155: ea28cb1
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cf056edbbe70393faa6edd2b7859a14467910946
+refs/heads/master: 284d952968d60cca156ef0c5efa62592b72264cb

trunk/CREDITS

@@ -518,7 +518,7 @@ N: Zach Brown
 E: zab@zabbo.net
 D: maestro pci sound
 
-N: David Brownell
+M: David Brownell
 D: Kernel engineer, mentor, and friend.  Maintained USB EHCI and
 D: gadget layers, SPI subsystem, GPIO subsystem, and more than a few
 D: device drivers.  His encouragement also helped many engineers get

trunk/Documentation/Changes

@@ -2,7 +2,13 @@ Intro
 =====
 
 This document is designed to provide a list of the minimum levels of
-software necessary to run the 3.0 kernels.
+software necessary to run the 2.6 kernels, as well as provide brief
+instructions regarding any other "Gotchas" users may encounter when
+trying life on the Bleeding Edge.  If upgrading from a pre-2.4.x
+kernel, please consult the Changes file included with 2.4.x kernels for
+additional information; most of that information will not be repeated
+here.  Basically, this document assumes that your system is already
+functional and running at least 2.4.x kernels.
 
 This document is originally based on my "Changes" file for 2.0.x kernels
 and therefore owes credit to the same people as that file (Jared Mauch,
@@ -16,10 +22,11 @@ Upgrade to at *least* these software revisions before thinking you've
 encountered a bug!  If you're unsure what version you're currently
 running, the suggested command should tell you.
 
-Again, keep in mind that this list assumes you are already functionally
-running a Linux kernel.  Also, not all tools are necessary on all
-systems; obviously, if you don't have any ISDN hardware, for example,
-you probably needn't concern yourself with isdn4k-utils.
+Again, keep in mind that this list assumes you are already
+functionally running a Linux 2.4 kernel.  Also, not all tools are
+necessary on all systems; obviously, if you don't have any ISDN
+hardware, for example, you probably needn't concern yourself with
+isdn4k-utils.
 
 o  Gnu C                  3.2                     # gcc --version
 o  Gnu make               3.80                    # make --version
@@ -107,12 +114,12 @@ Ksymoops
 
 If the unthinkable happens and your kernel oopses, you may need the
 ksymoops tool to decode it, but in most cases you don't.
-It is generally preferred to build the kernel with CONFIG_KALLSYMS so
-that it produces readable dumps that can be used as-is (this also
-produces better output than ksymoops).  If for some reason your kernel
-is not build with CONFIG_KALLSYMS and you have no way to rebuild and
-reproduce the Oops with that option, then you can still decode that Oops
-with ksymoops.
+In the 2.6 kernel it is generally preferred to build the kernel with
+CONFIG_KALLSYMS so that it produces readable dumps that can be used as-is
+(this also produces better output than ksymoops).
+If for some reason your kernel is not build with CONFIG_KALLSYMS and
+you have no way to rebuild and reproduce the Oops with that option, then
+you can still decode that Oops with ksymoops.
 
 Module-Init-Tools
 -----------------
@@ -254,8 +261,8 @@ needs to be recompiled or (preferably) upgraded.
 NFS-utils
 ---------
 
-In ancient (2.4 and earlier) kernels, the nfs server needed to know
-about any client that expected to be able to access files via NFS.  This
+In 2.4 and earlier kernels, the nfs server needed to know about any
+client that expected to be able to access files via NFS.  This
 information would be given to the kernel by "mountd" when the client
 mounted the filesystem, or by "exportfs" at system startup.  exportfs
 would take information about active clients from /var/lib/nfs/rmtab.
@@ -265,11 +272,11 @@ which is not always easy, particularly when trying to implement
 fail-over.  Even when the system is working well, rmtab suffers from
 getting lots of old entries that never get removed.
 
-With modern kernels we have the option of having the kernel tell mountd
-when it gets a request from an unknown host, and mountd can give
-appropriate export information to the kernel.  This removes the
-dependency on rmtab and means that the kernel only needs to know about
-currently active clients.
+With 2.6 we have the option of having the kernel tell mountd when it
+gets a request from an unknown host, and mountd can give appropriate
+export information to the kernel.  This removes the dependency on
+rmtab and means that the kernel only needs to know about currently
+active clients.
 
 To enable this new functionality, you need to:
 

trunk/Documentation/CodingStyle

@@ -680,8 +680,8 @@ ones already enabled by DEBUG.
 		Chapter 14: Allocating memory
 
 The kernel provides the following general purpose memory allocators:
-kmalloc(), kzalloc(), kcalloc(), vmalloc(), and vzalloc().  Please refer to
-the API documentation for further information about them.
+kmalloc(), kzalloc(), kcalloc(), and vmalloc().  Please refer to the API
+documentation for further information about them.
 
 The preferred form for passing a size of a struct is the following:
 

trunk/Documentation/accounting/cgroupstats.txt

@@ -21,7 +21,7 @@ information will not be available.
 To extract cgroup statistics a utility very similar to getdelays.c
 has been developed, the sample output of the utility is shown below
 
-~/balbir/cgroupstats # ./getdelays  -C "/sys/fs/cgroup/a"
+~/balbir/cgroupstats # ./getdelays  -C "/cgroup/a"
 sleeping 1, blocked 0, running 1, stopped 0, uninterruptible 0
-~/balbir/cgroupstats # ./getdelays  -C "/sys/fs/cgroup"
+~/balbir/cgroupstats # ./getdelays  -C "/cgroup"
 sleeping 155, blocked 0, running 1, stopped 0, uninterruptible 2

trunk/Documentation/cgroups/blkio-controller.txt

@@ -28,19 +28,16 @@ cgroups. Here is what you can do.
 - Enable group scheduling in CFQ
 	CONFIG_CFQ_GROUP_IOSCHED=y
 
-- Compile and boot into kernel and mount IO controller (blkio); see
-  cgroups.txt, Why are cgroups needed?.
+- Compile and boot into kernel and mount IO controller (blkio).
 
-	mount -t tmpfs cgroup_root /sys/fs/cgroup
-	mkdir /sys/fs/cgroup/blkio
-	mount -t cgroup -o blkio none /sys/fs/cgroup/blkio
+	mount -t cgroup -o blkio none /cgroup
 
 - Create two cgroups
-	mkdir -p /sys/fs/cgroup/blkio/test1/ /sys/fs/cgroup/blkio/test2
+	mkdir -p /cgroup/test1/ /cgroup/test2
 
 - Set weights of group test1 and test2
-	echo 1000 > /sys/fs/cgroup/blkio/test1/blkio.weight
-	echo 500 > /sys/fs/cgroup/blkio/test2/blkio.weight
+	echo 1000 > /cgroup/test1/blkio.weight
+	echo 500 > /cgroup/test2/blkio.weight
 
 - Create two same size files (say 512MB each) on same disk (file1, file2) and
   launch two dd threads in different cgroup to read those files.
@@ -49,12 +46,12 @@ cgroups. Here is what you can do.
 	echo 3 > /proc/sys/vm/drop_caches
 
 	dd if=/mnt/sdb/zerofile1 of=/dev/null &
-	echo $! > /sys/fs/cgroup/blkio/test1/tasks
-	cat /sys/fs/cgroup/blkio/test1/tasks
+	echo $! > /cgroup/test1/tasks
+	cat /cgroup/test1/tasks
 
 	dd if=/mnt/sdb/zerofile2 of=/dev/null &
-	echo $! > /sys/fs/cgroup/blkio/test2/tasks
-	cat /sys/fs/cgroup/blkio/test2/tasks
+	echo $! > /cgroup/test2/tasks
+	cat /cgroup/test2/tasks
 
 - At macro level, first dd should finish first. To get more precise data, keep
   on looking at (with the help of script), at blkio.disk_time and
@@ -71,13 +68,13 @@ Throttling/Upper Limit policy
 - Enable throttling in block layer
 	CONFIG_BLK_DEV_THROTTLING=y
 
-- Mount blkio controller (see cgroups.txt, Why are cgroups needed?)
-        mount -t cgroup -o blkio none /sys/fs/cgroup/blkio
+- Mount blkio controller
+        mount -t cgroup -o blkio none /cgroup/blkio
 
 - Specify a bandwidth rate on particular device for root group. The format
   for policy is "<major>:<minor>  <byes_per_second>".
 
-        echo "8:16  1048576" > /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device
+        echo "8:16  1048576" > /cgroup/blkio/blkio.read_bps_device
 
   Above will put a limit of 1MB/second on reads happening for root group
   on device having major/minor number 8:16.
@@ -90,7 +87,7 @@ Throttling/Upper Limit policy
         1024+0 records out
         4194304 bytes (4.2 MB) copied, 4.0001 s, 1.0 MB/s
 
- Limits for writes can be put using blkio.throttle.write_bps_device file.
+ Limits for writes can be put using blkio.write_bps_device file.
 
 Hierarchical Cgroups
 ====================
@@ -111,7 +108,7 @@ Hierarchical Cgroups
   CFQ and throttling will practically treat all groups at same level.
 
 				pivot
-			     /  /   \  \
+			     /  |   \  \
 			root  test1 test2  test3
 
   Down the line we can implement hierarchical accounting/control support
@@ -152,7 +149,7 @@ Proportional weight policy files
 
 	  Following is the format.
 
-	  # echo dev_maj:dev_minor weight > blkio.weight_device
+	  #echo dev_maj:dev_minor weight > /path/to/cgroup/blkio.weight_device
 	  Configure weight=300 on /dev/sdb (8:16) in this cgroup
 	  # echo 8:16 300 > blkio.weight_device
 	  # cat blkio.weight_device
@@ -286,28 +283,28 @@ Throttling/Upper limit policy files
 	  specified in bytes per second. Rules are per deivce. Following is
 	  the format.
 
-  echo "<major>:<minor>  <rate_bytes_per_second>" > /cgrp/blkio.throttle.read_bps_device
+  echo "<major>:<minor>  <rate_bytes_per_second>" > /cgrp/blkio.read_bps_device
 
 - blkio.throttle.write_bps_device
 	- Specifies upper limit on WRITE rate to the device. IO rate is
 	  specified in bytes per second. Rules are per deivce. Following is
 	  the format.
 
-  echo "<major>:<minor>  <rate_bytes_per_second>" > /cgrp/blkio.throttle.write_bps_device
+  echo "<major>:<minor>  <rate_bytes_per_second>" > /cgrp/blkio.write_bps_device
 
 - blkio.throttle.read_iops_device
 	- Specifies upper limit on READ rate from the device. IO rate is
 	  specified in IO per second. Rules are per deivce. Following is
 	  the format.
 
-  echo "<major>:<minor>  <rate_io_per_second>" > /cgrp/blkio.throttle.read_iops_device
+  echo "<major>:<minor>  <rate_io_per_second>" > /cgrp/blkio.read_iops_device
 
 - blkio.throttle.write_iops_device
 	- Specifies upper limit on WRITE rate to the device. IO rate is
 	  specified in io per second. Rules are per deivce. Following is
 	  the format.
 
-  echo "<major>:<minor>  <rate_io_per_second>" > /cgrp/blkio.throttle.write_iops_device
+  echo "<major>:<minor>  <rate_io_per_second>" > /cgrp/blkio.write_iops_device
 
 Note: If both BW and IOPS rules are specified for a device, then IO is
       subjectd to both the constraints.