linux.git/Documentation/vm, branch v2.6.29

mm: remove try_to_munlock from vmscan

2009-01-06T23:59:03+00:00

An unfortunate feature of the Unevictable LRU work was that reclaiming an
anonymous page involved an extra scan through the anon_vma: to check that
the page is evictable before allocating swap, because the swap could not
be freed reliably soon afterwards.

Now try_to_free_swap() has replaced remove_exclusive_swap_page(), that's
not an issue any more: remove try_to_munlock() call from
shrink_page_list(), leaving it to try_to_munmap() to discover if the page
is one to be culled to the unevictable list - in which case then
try_to_free_swap().

Update unevictable-lru.txt to remove comments on the try_to_munlock() in
shrink_page_list(), and shorten some lines over 80 columns.

Signed-off-by: Hugh Dickins 
Cc: Lee Schermerhorn 
Acked-by: Rik van Riel 
Cc: Nick Piggin 
Cc: KAMEZAWA Hiroyuki 
Cc: Robin Holt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

.gitignore updates

2008-10-30T18:38:45+00:00

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

doc: unevictable LRU and mlocked pages documentation

2008-10-20T15:52:31+00:00

Documentation for unevictable lru list and its usage.

Signed-off-by: Lee Schermerhorn 
Signed-off-by: Rik van Riel 
Cc: KOSAKI Motohiro 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Documentation/vm/page_migration: update reference to numa_maps + fix download URI

2008-08-15T15:35:42+00:00

With man-pages-3.07, the numa_maps documentation home is now proc(5), so
the reference in Documentation/vm/page_migration needs updating.
(Cliff/Lee are removing numa_maps.5 from the numactl package.) Also, the
download location for the numactl package changed a while back.  This
patch fixes both things, as well as a typo (provided-->provides).

Signed-off-by: Michael Kerrisk 
Cc: Cliff Wickman 
Cc: Lee Schermerhorn 
Cc: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

docsrc: build Documentation/ sources

2008-08-12T23:07:30+00:00

Currently source files in the Documentation/ sub-dir can easily bit-rot
since they are not generally buildable, either because they are hidden in
text files or because there are no Makefile rules for them.  This needs to
be fixed so that the source files remain usable and good examples of code
instead of bad examples.

Add the ability to build source files that are in the Documentation/ dir.
Add to Kconfig as "BUILD_DOCSRC" config symbol.

Use "CONFIG_BUILD_DOCSRC=1 make ..." to build objects from the
Documentation/ sources.  Or enable BUILD_DOCSRC in the *config system.
However, this symbol depends on HEADERS_CHECK since the header files need
to be installed (for userspace builds).

Built (using cross-tools) for x86-64, i386, alpha, ia64, sparc32,
sparc64, powerpc, sh, m68k, & mips.

Signed-off-by: Randy Dunlap 
Reviewed-by: Sam Ravnborg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Documentation cleanup: trivial misspelling, punctuation, and grammar corrections.

2008-07-26T19:00:06+00:00

Cc: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

hugetlb: new sysfs interface

2008-07-24T17:47:17+00:00

Provide new hugepages user APIs that are more suited to multiple hstates
in sysfs.  There is a new directory, /sys/kernel/hugepages.  Underneath
that directory there will be a directory per-supported hugepage size,
e.g.:

/sys/kernel/hugepages/hugepages-64kB
/sys/kernel/hugepages/hugepages-16384kB
/sys/kernel/hugepages/hugepages-16777216kB

corresponding to 64k, 16m and 16g respectively.  Within each
hugepages-size directory there are a number of files, corresponding to the
tracked counters in the hstate, e.g.:

/sys/kernel/hugepages/hugepages-64/nr_hugepages
/sys/kernel/hugepages/hugepages-64/nr_overcommit_hugepages
/sys/kernel/hugepages/hugepages-64/free_hugepages
/sys/kernel/hugepages/hugepages-64/resv_hugepages
/sys/kernel/hugepages/hugepages-64/surplus_hugepages

Of these files, the first two are read-write and the latter three are
read-only.  The size of the hugepage being manipulated is trivially
deducible from the enclosing directory and is always expressed in kB (to
match meminfo).

[dave@linux.vnet.ibm.com: fix build]
[nacc@us.ibm.com: hugetlb: hang off of /sys/kernel/mm rather than /sys/kernel]
[nacc@us.ibm.com: hugetlb: remove CONFIG_SYSFS dependency]
Acked-by: Greg Kroah-Hartman 
Signed-off-by: Nishanth Aravamudan 
Signed-off-by: Nick Piggin 
Cc: Dave Hansen 
Signed-off-by: Nishanth Aravamudan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Christoph has moved

2008-07-04T17:40:04+00:00

Remove all clameter@sgi.com addresses from the kernel tree since they will
become invalid on June 27th.  Change my maintainer email address for the
slab allocators to cl@linux-foundation.org (which will be the new email
address for the future).

Signed-off-by: Christoph Lameter 
Signed-off-by: Christoph Lameter 
Cc: Pekka Enberg 
Cc: Stephen Rothwell 
Cc: Matt Mackall 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

pagemap: add documentation for pagemap

2008-06-06T18:29:14+00:00

Just a quick explanation of the pagemap interface from a userspace point
of view, and an example of how to use it (in English, not code).

Signed-off-by: Thomas  Tuttle 
Cc: Matt Mackall 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

slabinfo: Support printout of the number of fallbacks

2008-05-01T21:26:51+00:00

Add functionality to slabinfo to print out the number of fallbacks
that have occurred for each slab cache when the -D option is specified.
Also widen the allocation / free field since the numbers became
too big after a week.

Signed-off-by: Christoph Lameter 
Signed-off-by: Pekka Enberg