linux/drivers/base/node.c, branch v2.6.37

writeback: add /sys/devices/system/node//vmstat

2010-10-26T23:52:06Z

For NUMA node systems it is important to have visibility in memory characteristics. Two of the /proc/vmstat values "nr_written" and "nr_dirtied" are added here. # cat /sys/devices/system/node/node20/vmstat nr_written 0 nr_dirtied 0 Signed-off-by: Michael Rubin Reviewed-by: Wu Fengguang Cc: Dave Chinner Cc: Jens Axboe Cc: KOSAKI Motohiro Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

driver core: Convert link_mem_sections to use find_memory_block_hinted.

2010-10-22T17:16:44Z

Modify link_mem_sections() to pass in the previous mem_block as a hint to locating the next mem_block. Since they are typically added in order this results in a massive saving in time during boot of a very large system. For example, on a 16TB x86_64 machine, it reduced the total time spent linking all node's memory sections from 1 hour, 27 minutes to 46 seconds. Signed-off-by: Robin Holt To: Gary Hade To: Badari Pulavarty To: Ingo Molnar Reviewed-by: KAMEZAWA Hiroyuki Signed-off-by: Greg Kroah-Hartman

drivers/base/node.c: reduce stack usage of node_read_meminfo()

2010-08-10T03:45:02Z

drivers/base/node.c: In function 'node_read_meminfo': drivers/base/node.c:139: warning: the frame size of 848 bytes is larger than 512 bytes Fix it by splitting the sprintf() into three parts. It has no functional change. Signed-off-by: KOSAKI Motohiro Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: compaction: add /sys trigger for per-node memory compaction

2010-05-25T15:06:59Z

Add a per-node sysfs file called compact. When the file is written to, each zone in that node is compacted. The intention that this would be used by something like a job scheduler in a batch system before a job starts so that the job can allocate the maximum number of hugepages without significant start-up cost. Signed-off-by: Mel Gorman Acked-by: Rik van Riel Reviewed-by: KOSAKI Motohiro Reviewed-by: Christoph Lameter Reviewed-by: Minchan Kim Reviewed-by: KAMEZAWA Hiroyuki Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

nodemask: include slab.h from drivers/base/node.c

2010-04-06T21:41:41Z

NODEMASK_ALLOC/FREE are mapped to kmalloc/free if NODES_SHIFT > 8. Among its several users, drivers/base/node.c wasn't including slab.h leading to build failure if NODES_SHIFT > 8. Include slab.h from drivers/base/node.c. This isn't an ideal solution but including slab.h directly from nodemask.h is not an option because nodemask.h gets included everywhere. For now, make it work by including slab.h from its users. Signed-off-by: Tejun Heo Reported-by: Ingo Molnar

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32Z

percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo Guess-its-ok-by: Christoph Lameter Cc: Ingo Molnar Cc: Lee Schermerhorn

driver core: numa: fix BUILD_BUG_ON for node_read_distance

2010-03-19T14:12:22Z

node_read_distance() has a BUILD_BUG_ON() to prevent buffer overruns when the number of nodes printed will exceed the buffer length. Each node only needs four chars: three for distance (maximum distance is 255) and one for a seperating space or a trailing newline. Signed-off-by: David Rientjes Cc: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

sysdev: Use sysdev_class attribute arrays in node driver

2010-03-08T01:04:47Z

Convert the node driver to sysdev_class attribute arrays. This greatly cleans up the code and remove a lot of code. Saves ~150 bytes of code on x86-64. Signed-off-by: Andi Kleen Signed-off-by: Greg Kroah-Hartman

sysdev: Convert node driver class attributes to be data driven

2010-03-08T01:04:47Z

Using the new attribute argument convert the node driver class attributes to carry the node state. Then use a shared function to do what a lot of individual functions did before. Signed-off-by: Andi Kleen Signed-off-by: Greg Kroah-Hartman

sysdev: Pass attribute in sysdev_class attributes show/store

2010-03-08T01:04:47Z

Passing the attribute to the low level IO functions allows all kinds of cleanups, by sharing low level IO code without requiring an own function for every piece of data. Also drivers can extend the attributes with own data fields and use that in the low level function. Similar to sysdev_attributes and normal attributes. This is a tree-wide sweep, converting everything in one go. No functional changes in this patch other than passing the new argument everywhere. Tested on x86, the non x86 parts are uncompiled. Signed-off-by: Andi Kleen Signed-off-by: Greg Kroah-Hartman