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  1. 14 9月, 2015 2 次提交
  3. 09 9月, 2015 2 次提交
    • M
      mm: /proc/pid/smaps:: show proportional swap share of the mapping · 8334b962
      由 Minchan Kim 提交于 
      We want to know per-process workingset size for smart memory management
on userland and we use swap(ex, zram) heavily to maximize memory
efficiency so workingset includes swap as well as RSS.

On such system, if there are lots of shared anonymous pages, it's really
hard to figure out exactly how many each process consumes memory(ie, rss
+ wap) if the system has lots of shared anonymous memory(e.g, android).

This patch introduces SwapPss field on /proc/<pid>/smaps so we can get
more exact workingset size per process.

Bongkyu tested it. Result is below.

1. 50M used swap
SwapTotal: 461976 kB
SwapFree: 411192 kB

$ adb shell cat /proc/*/smaps | grep "SwapPss:" | awk '{sum += $2} END {print sum}';
48236
$ adb shell cat /proc/*/smaps | grep "Swap:" | awk '{sum += $2} END {print sum}';
141184

2. 240M used swap
SwapTotal: 461976 kB
SwapFree: 216808 kB

$ adb shell cat /proc/*/smaps | grep "SwapPss:" | awk '{sum += $2} END {print sum}';
230315
$ adb shell cat /proc/*/smaps | grep "Swap:" | awk '{sum += $2} END {print sum}';
1387744

[akpm@linux-foundation.org: simplify kunmap_atomic() call]
Signed-off-by: NMinchan Kim <minchan@kernel.org>
Reported-by: NBongkyu Kim <bongkyu.kim@lge.com>
Tested-by: NBongkyu Kim <bongkyu.kim@lge.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jerome Marchand <jmarchan@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      8334b962
    • M
      dax: add huge page fault support · 844f35db
      由 Matthew Wilcox 提交于 
      This is the support code for DAX-enabled filesystems to allow them to
provide huge pages in response to faults.
Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      844f35db
  5. 21 8月, 2015 1 次提交
  7. 06 8月, 2015 1 次提交
  9. 05 8月, 2015 1 次提交
  11. 24 7月, 2015 2 次提交
    • W
      Documentation: Update filesystems/debugfs.txt · 9e1aa7c8
      由 Wang Long 提交于 
      This patch update the Documentation/filesystems/debugfs.txt
file. The main work is to add the description of the following
functions:
    debugfs_create_atomic_t
    debugfs_create_u32_array
    debugfs_create_devm_seqfile
    debugfs_create_file_size
Signed-off-by: NWang Long <long.wanglong@huawei.com>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>
      9e1aa7c8
    • J
      fs: Remove ext3 filesystem driver · c290ea01
      由 Jan Kara 提交于 
      The functionality of ext3 is fully supported by ext4 driver. Major
distributions (SUSE, RedHat) already use ext4 driver to handle ext3
filesystems for quite some time. There is some ugliness in mm resulting
from jbd cleaning buffers in a dirty page without cleaning page dirty
bit and also support for buffer bouncing in the block layer when stable
pages are required is there only because of jbd. So let's remove the
ext3 driver. This saves us some 28k lines of duplicated code.
Acked-by: NTheodore Ts'o <tytso@mit.edu>
Signed-off-by: NJan Kara <jack@suse.cz>
      c290ea01
  13. 21 7月, 2015 1 次提交
  15. 10 7月, 2015 1 次提交
  17. 05 7月, 2015 1 次提交
  19. 01 7月, 2015 1 次提交
  21. 09 6月, 2015 1 次提交
  23. 05 6月, 2015 1 次提交
  25. 01 6月, 2015 1 次提交
  27. 18 5月, 2015 1 次提交
  29. 15 5月, 2015 2 次提交
  31. 11 5月, 2015 3 次提交
    • A
      switch ->put_link() from dentry to inode · 5f2c4179
      由 Al Viro 提交于 
      only one instance looks at that argument at all; that sole
exception wants inode rather than dentry.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      5f2c4179
    • A
      don't pass nameidata to ->follow_link() · 6e77137b
      由 Al Viro 提交于 
      its only use is getting passed to nd_jump_link(), which can obtain
it from current->nameidata
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      6e77137b
    • A
      new ->follow_link() and ->put_link() calling conventions · 680baacb
      由 Al Viro 提交于 
      a) instead of storing the symlink body (via nd_set_link()) and returning
an opaque pointer later passed to ->put_link(), ->follow_link() _stores_
that opaque pointer (into void * passed by address by caller) and returns
the symlink body.  Returning ERR_PTR() on error, NULL on jump (procfs magic
symlinks) and pointer to symlink body for normal symlinks.  Stored pointer
is ignored in all cases except the last one.

Storing NULL for opaque pointer (or not storing it at all) means no call
of ->put_link().

b) the body used to be passed to ->put_link() implicitly (via nameidata).
Now only the opaque pointer is.  In the cases when we used the symlink body
to free stuff, ->follow_link() now should store it as opaque pointer in addition
to returning it.
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      680baacb
  33. 08 5月, 2015 2 次提交
  35. 05 5月, 2015 1 次提交
  37. 17 4月, 2015 2 次提交
  39. 16 4月, 2015 2 次提交
    • B
      mm: new pfn_mkwrite same as page_mkwrite for VM_PFNMAP · dd906184
      由 Boaz Harrosh 提交于 
      This will allow FS that uses VM_PFNMAP | VM_MIXEDMAP (no page structs) to
get notified when access is a write to a read-only PFN.

This can happen if we mmap() a file then first mmap-read from it to
page-in a read-only PFN, than we mmap-write to the same page.

We need this functionality to fix a DAX bug, where in the scenario above
we fail to set ctime/mtime though we modified the file.  An xfstest is
attached to this patchset that shows the failure and the fix.  (A DAX
patch will follow)

This functionality is extra important for us, because upon dirtying of a
pmem page we also want to RDMA the page to a remote cluster node.

We define a new pfn_mkwrite and do not reuse page_mkwrite because
  1 - The name ;-)
  2 - But mainly because it would take a very long and tedious
      audit of all page_mkwrite functions of VM_MIXEDMAP/VM_PFNMAP
      users. To make sure they do not now CRASH. For example current
      DAX code (which this is for) would crash.
      If we would want to reuse page_mkwrite, We will need to first
      patch all users, so to not-crash-on-no-page. Then enable this
      patch. But even if I did that I would not sleep so well at night.
      Adding a new vector is the safest thing to do, and is not that
      expensive. an extra pointer at a static function vector per driver.
      Also the new vector is better for performance, because else we
      Will call all current Kernel vectors, so to:
        check-ha-no-page-do-nothing and return.

No need to call it from do_shared_fault because do_wp_page is called to
change pte permissions anyway.
Signed-off-by: NYigal Korman <yigal@plexistor.com>
Signed-off-by: NBoaz Harrosh <boaz@plexistor.com>
Acked-by: NKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Matthew Wilcox <matthew.r.wilcox@intel.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      dd906184
    • S
      rdma: replace deprecated ifconfig in doc · b962dc0a
      由 Stephen Hemminger 提交于 
      The ifconfig command has been deprecated for many years.
To encourage new users not to continue using it and learning
iproute2; the ifconfig should not be used in examples.
Signed-off-by: NStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>
      b962dc0a
  41. 12 4月, 2015 3 次提交
  43. 11 4月, 2015 1 次提交
  45. 04 4月, 2015 1 次提交
  47. 02 4月, 2015 1 次提交
  49. 04 3月, 2015 1 次提交
  51. 01 3月, 2015 1 次提交
  53. 24 2月, 2015 2 次提交
  55. 23 2月, 2015 1 次提交