---

yaml
---
r: 143831
b: refs/heads/master
c: 0dbbbf1
h: refs/heads/master
i:
  143829: 310b3a2
  143827: 61d4dcf
  143823: cf5f7df
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 437f7fdb607f32b737e4da9f14bebcfdac2c90c3
+refs/heads/master: 0dbbbf1a0e305ad900b733e2ba1cac304d31696e

trunk/.gitignore

@@ -49,7 +49,6 @@ include/linux/compile.h
 include/linux/version.h
 include/linux/utsrelease.h
 include/linux/bounds.h
-include/generated
 
 # stgit generated dirs
 patches-*

trunk/Documentation/ABI/testing/debugfs-pktcdvd

@@ -1,4 +1,4 @@
-What:           /sys/kernel/debug/pktcdvd/pktcdvd[0-7]
+What:           /debug/pktcdvd/pktcdvd[0-7]
 Date:           Oct. 2006
 KernelVersion:  2.6.20
 Contact:        Thomas Maier <balagi@justmail.de>
@@ -10,10 +10,10 @@ debugfs interface
 The pktcdvd module (packet writing driver) creates
 these files in debugfs:
 
-/sys/kernel/debug/pktcdvd/pktcdvd[0-7]/
+/debug/pktcdvd/pktcdvd[0-7]/
     info            (0444) Lots of driver statistics and infos.
 
 Example:
 -------
 
-cat /sys/kernel/debug/pktcdvd/pktcdvd0/info
+cat /debug/pktcdvd/pktcdvd0/info

trunk/Documentation/DMA-mapping.txt

@@ -136,7 +136,7 @@ exactly why.
 The standard 32-bit addressing PCI device would do something like
 this:
 
-	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
+	if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 		printk(KERN_WARNING
 		       "mydev: No suitable DMA available.\n");
 		goto ignore_this_device;
@@ -155,9 +155,9 @@ all 64-bits when accessing streaming DMA:
 
 	int using_dac;
 
-	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
+	if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
 		using_dac = 1;
-	} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
+	} else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 		using_dac = 0;
 	} else {
 		printk(KERN_WARNING
@@ -170,14 +170,14 @@ the case would look like this:
 
 	int using_dac, consistent_using_dac;
 
-	if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
+	if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
 		using_dac = 1;
 	   	consistent_using_dac = 1;
-		pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
-	} else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32))) {
+		pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
+	} else if (!pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
 		using_dac = 0;
 		consistent_using_dac = 0;
-		pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+		pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
 	} else {
 		printk(KERN_WARNING
 		       "mydev: No suitable DMA available.\n");
@@ -192,7 +192,7 @@ check the return value from pci_set_consistent_dma_mask().
 Finally, if your device can only drive the low 24-bits of
 address during PCI bus mastering you might do something like:
 
-	if (pci_set_dma_mask(pdev, DMA_BIT_MASK(24))) {
+	if (pci_set_dma_mask(pdev, DMA_24BIT_MASK)) {
 		printk(KERN_WARNING
 		       "mydev: 24-bit DMA addressing not available.\n");
 		goto ignore_this_device;
@@ -213,7 +213,7 @@ most specific mask.
 
 Here is pseudo-code showing how this might be done:
 
-	#define PLAYBACK_ADDRESS_BITS	DMA_BIT_MASK(32)
+	#define PLAYBACK_ADDRESS_BITS	DMA_32BIT_MASK
 	#define RECORD_ADDRESS_BITS	0x00ffffff
 
 	struct my_sound_card *card;

trunk/Documentation/DocBook/Makefile

@@ -31,7 +31,7 @@ PS_METHOD	= $(prefer-db2x)
 
 ###
 # The targets that may be used.
-PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs cleandocs
+PHONY += xmldocs sgmldocs psdocs pdfdocs htmldocs mandocs installmandocs
 
 BOOKS := $(addprefix $(obj)/,$(DOCBOOKS))
 xmldocs: $(BOOKS)
@@ -213,12 +213,11 @@ silent_gen_xml = :
 dochelp:
 	@echo  ' Linux kernel internal documentation in different formats:'
 	@echo  '  htmldocs        - HTML'
+	@echo  '  installmandocs  - install man pages generated by mandocs'
+	@echo  '  mandocs         - man pages'
 	@echo  '  pdfdocs         - PDF'
 	@echo  '  psdocs          - Postscript'
 	@echo  '  xmldocs         - XML DocBook'
-	@echo  '  mandocs         - man pages'
-	@echo  '  installmandocs  - install man pages generated by mandocs'
-	@echo  '  cleandocs       - clean all generated DocBook files'
 
 ###
 # Temporary files left by various tools
@@ -236,10 +235,6 @@ clean-files := $(DOCBOOKS) \
 
 clean-dirs := $(patsubst %.xml,%,$(DOCBOOKS)) man
 
-cleandocs:
-	$(Q)rm -f $(call objectify, $(clean-files))
-	$(Q)rm -rf $(call objectify, $(clean-dirs))
-
 # Declare the contents of the .PHONY variable as phony.  We keep that
 # information in a variable se we can use it in if_changed and friends.
 

trunk/Documentation/DocBook/kernel-api.tmpl

@@ -259,7 +259,7 @@ X!Earch/x86/kernel/mca_32.c
 !Eblock/blk-tag.c
 !Iblock/blk-tag.c
 !Eblock/blk-integrity.c
-!Ikernel/trace/blktrace.c
+!Iblock/blktrace.c
 !Iblock/genhd.c
 !Eblock/genhd.c
   </chapter>

trunk/Documentation/DocBook/writing-an-alsa-driver.tmpl

@@ -1137,8 +1137,8 @@
           if (err < 0)
                   return err;
           /* check PCI availability (28bit DMA) */
-          if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
-              pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
+          if (pci_set_dma_mask(pci, DMA_28BIT_MASK) < 0 ||
+              pci_set_consistent_dma_mask(pci, DMA_28BIT_MASK) < 0) {
                   printk(KERN_ERR "error to set 28bit mask DMA\n");
                   pci_disable_device(pci);
                   return -ENXIO;
@@ -1252,8 +1252,8 @@
   err = pci_enable_device(pci);
   if (err < 0)
           return err;
-  if (pci_set_dma_mask(pci, DMA_BIT_MASK(28)) < 0 ||
-      pci_set_consistent_dma_mask(pci, DMA_BIT_MASK(28)) < 0) {
+  if (pci_set_dma_mask(pci, DMA_28BIT_MASK) < 0 ||
+      pci_set_consistent_dma_mask(pci, DMA_28BIT_MASK) < 0) {
           printk(KERN_ERR "error to set 28bit mask DMA\n");
           pci_disable_device(pci);
           return -ENXIO;

trunk/Documentation/block/biodoc.txt

@@ -1040,21 +1040,23 @@ Front merges are handled by the binary trees in AS and deadline schedulers.
 iii. Plugging the queue to batch requests in anticipation of opportunities for
      merge/sort optimizations
 
+This is just the same as in 2.4 so far, though per-device unplugging
+support is anticipated for 2.5. Also with a priority-based i/o scheduler,
+such decisions could be based on request priorities.
+
 Plugging is an approach that the current i/o scheduling algorithm resorts to so
 that it collects up enough requests in the queue to be able to take
 advantage of the sorting/merging logic in the elevator. If the
 queue is empty when a request comes in, then it plugs the request queue
-(sort of like plugging the bath tub of a vessel to get fluid to build up)
+(sort of like plugging the bottom of a vessel to get fluid to build up)
 till it fills up with a few more requests, before starting to service
 the requests. This provides an opportunity to merge/sort the requests before
 passing them down to the device. There are various conditions when the queue is
 unplugged (to open up the flow again), either through a scheduled task or
 could be on demand. For example wait_on_buffer sets the unplugging going
-through sync_buffer() running blk_run_address_space(mapping). Or the caller
-can do it explicity through blk_unplug(bdev). So in the read case,
-the queue gets explicitly unplugged as part of waiting for completion on that
-buffer. For page driven IO, the address space ->sync_page() takes care of
-doing the blk_run_address_space().
+(by running tq_disk) so the read gets satisfied soon. So in the read case,
+the queue gets explicitly unplugged as part of waiting for completion,
+in fact all queues get unplugged as a side-effect.
 
 Aside:
   This is kind of controversial territory, as it's not clear if plugging is
@@ -1065,6 +1067,11 @@ Aside:
   multi-page bios being queued in one shot, we may not need to wait to merge
   a big request from the broken up pieces coming by.
 
+  Per-queue granularity unplugging (still a Todo) may help reduce some of the
+  concerns with just a single tq_disk flush approach. Something like
+  blk_kick_queue() to unplug a specific queue (right away ?)
+  or optionally, all queues, is in the plan.
+
 4.4 I/O contexts
 I/O contexts provide a dynamically allocated per process data area. They may
 be used in I/O schedulers, and in the block layer (could be used for IO statis,

trunk/Documentation/blockdev/00-INDEX

@@ -8,8 +8,6 @@ cpqarray.txt
 	- info on using Compaq's SMART2 Intelligent Disk Array Controllers.
 floppy.txt
 	- notes and driver options for the floppy disk driver.
-mflash.txt
-	- info on mGine m(g)flash driver for linux.
 nbd.txt
 	- info on a TCP implementation of a network block device.
 paride.txt

trunk/Documentation/cgroups/cpuacct.txt

@@ -30,21 +30,3 @@ The above steps create a new group g1 and move the current shell
 process (bash) into it. CPU time consumed by this bash and its children
 can be obtained from g1/cpuacct.usage and the same is accumulated in
 /cgroups/cpuacct.usage also.
-
-cpuacct.stat file lists a few statistics which further divide the
-CPU time obtained by the cgroup into user and system times. Currently
-the following statistics are supported:
-
-user: Time spent by tasks of the cgroup in user mode.
-system: Time spent by tasks of the cgroup in kernel mode.
-
-user and system are in USER_HZ unit.
-
-cpuacct controller uses percpu_counter interface to collect user and
-system times. This has two side effects:
-
-- It is theoretically possible to see wrong values for user and system times.
-  This is because percpu_counter_read() on 32bit systems isn't safe
-  against concurrent writes.
-- It is possible to see slightly outdated values for user and system times
-  due to the batch processing nature of percpu_counter.

trunk/Documentation/cgroups/memory.txt

@@ -6,14 +6,15 @@ used here with the memory controller that is used in hardware.
 
 Salient features
 
-a. Enable control of Anonymous, Page Cache (mapped and unmapped) and
-   Swap Cache memory pages.
+a. Enable control of both RSS (mapped) and Page Cache (unmapped) pages
 b. The infrastructure allows easy addition of other types of memory to control
 c. Provides *zero overhead* for non memory controller users
 d. Provides a double LRU: global memory pressure causes reclaim from the
    global LRU; a cgroup on hitting a limit, reclaims from the per
    cgroup LRU
 
+NOTE: Swap Cache (unmapped) is not accounted now.
+
 Benefits and Purpose of the memory controller
 
 The memory controller isolates the memory behaviour of a group of tasks
@@ -289,44 +290,34 @@ will be charged as a new owner of it.
   moved to the parent. If you want to avoid that, force_empty will be useful.
 
 5.2 stat file
-
-memory.stat file includes following statistics
-
-cache		- # of bytes of page cache memory.
-rss		- # of bytes of anonymous and swap cache memory.
-pgpgin		- # of pages paged in (equivalent to # of charging events).
-pgpgout		- # of pages paged out (equivalent to # of uncharging events).
-active_anon	- # of bytes of anonymous and  swap cache memory on active
-		  lru list.
-inactive_anon	- # of bytes of anonymous memory and swap cache memory on
-		  inactive lru list.
-active_file	- # of bytes of file-backed memory on active lru list.
-inactive_file	- # of bytes of file-backed memory on inactive lru list.
-unevictable	- # of bytes of memory that cannot be reclaimed (mlocked etc).
-
-The following additional stats are dependent on CONFIG_DEBUG_VM.
-
-inactive_ratio		- VM internal parameter. (see mm/page_alloc.c)
-recent_rotated_anon	- VM internal parameter. (see mm/vmscan.c)
-recent_rotated_file	- VM internal parameter. (see mm/vmscan.c)
-recent_scanned_anon	- VM internal parameter. (see mm/vmscan.c)
-recent_scanned_file	- VM internal parameter. (see mm/vmscan.c)
-
-Memo:
+  memory.stat file includes following statistics (now)
+	cache			- # of pages from page-cache and shmem.
+	rss			- # of pages from anonymous memory.
+	pgpgin			- # of event of charging
+	pgpgout			- # of event of uncharging
+	active_anon		- # of pages on active lru of anon, shmem.
+	inactive_anon 		- # of pages on active lru of anon, shmem
+	active_file		- # of pages on active lru of file-cache
+	inactive_file		- # of pages on inactive lru of file cache
+	unevictable		- # of pages cannot be reclaimed.(mlocked etc)
+
+	Below is depend on CONFIG_DEBUG_VM.
+	inactive_ratio		- VM internal parameter. (see mm/page_alloc.c)
+	recent_rotated_anon	- VM internal parameter. (see mm/vmscan.c)
+	recent_rotated_file	- VM internal parameter. (see mm/vmscan.c)
+	recent_scanned_anon 	- VM internal parameter. (see mm/vmscan.c)
+	recent_scanned_file 	- VM internal parameter. (see mm/vmscan.c)
+
+  Memo:
 	recent_rotated means recent frequency of lru rotation.
 	recent_scanned means recent # of scans to lru.
 	showing for better debug please see the code for meanings.
 
-Note:
-	Only anonymous and swap cache memory is listed as part of 'rss' stat.
-	This should not be confused with the true 'resident set size' or the
-	amount of physical memory used by the cgroup. Per-cgroup rss
-	accounting is not done yet.
 
 5.3 swappiness
   Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only.
 
-  Following cgroups' swapiness can't be changed.
+  Following cgroup's swapiness can't be changed.
   - root cgroup (uses /proc/sys/vm/swappiness).
   - a cgroup which uses hierarchy and it has child cgroup.
   - a cgroup which uses hierarchy and not the root of hierarchy.