1. 12 9月, 2013 4 次提交
  2. 10 7月, 2013 3 次提交
  3. 02 5月, 2013 1 次提交
  4. 01 5月, 2013 3 次提交
  5. 30 4月, 2013 1 次提交
  6. 10 4月, 2013 1 次提交
    • A
      procfs: new helper - PDE_DATA(inode) · d9dda78b
      Al Viro 提交于
      The only part of proc_dir_entry the code outside of fs/proc
      really cares about is PDE(inode)->data.  Provide a helper
      for that; static inline for now, eventually will be moved
      to fs/proc, along with the knowledge of struct proc_dir_entry
      layout.
      Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
      d9dda78b
  7. 28 2月, 2013 1 次提交
  8. 05 1月, 2013 1 次提交
    • S
      ipc: add sysctl to specify desired next object id · 03f59566
      Stanislav Kinsbursky 提交于
      Add 3 new variables and sysctls to tune them (by one "next_id" variable
      for messages, semaphores and shared memory respectively).  This variable
      can be used to set desired id for next allocated IPC object.  By default
      it's equal to -1 and old behaviour is preserved.  If this variable is
      non-negative, then desired idr will be extracted from it and used as a
      start value to search for free IDR slot.
      
      Notes:
      
      1) this patch doesn't guarantee that the new object will have desired
         id.  So it's up to user space how to handle new object with wrong id.
      
      2) After a sucessful id allocation attempt, "next_id" will be set back
         to -1 (if it was non-negative).
      
      [akpm@linux-foundation.org: checkpatch fixes]
      Signed-off-by: NStanislav Kinsbursky <skinsbursky@parallels.com>
      Cc: Serge Hallyn <serge.hallyn@canonical.com>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Pavel Emelyanov <xemul@parallels.com>
      Cc: Al Viro <viro@zeniv.linux.org.uk>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      03f59566
  9. 07 9月, 2012 1 次提交
  10. 31 7月, 2012 1 次提交
  11. 21 7月, 2011 1 次提交
  12. 28 3月, 2011 1 次提交
  13. 24 3月, 2011 1 次提交
  14. 25 5月, 2010 1 次提交
  15. 23 9月, 2009 1 次提交
  16. 07 4月, 2009 1 次提交
  17. 05 1月, 2009 2 次提交
  18. 20 11月, 2008 1 次提交
  19. 14 11月, 2008 1 次提交
  20. 26 7月, 2008 2 次提交
  21. 29 4月, 2008 8 次提交
  22. 09 2月, 2008 3 次提交
    • P
      IPC: make struct ipc_ids static in ipc_namespace · ed2ddbf8
      Pierre Peiffer 提交于
      Each ipc_namespace contains a table of 3 pointers to struct ipc_ids (3 for
      msg, sem and shm, structure used to store all ipcs) These 'struct ipc_ids'
      are dynamically allocated for each icp_namespace as the ipc_namespace
      itself (for the init namespace, they are initialized with pointers to
      static variables instead)
      
      It is so for historical reason: in fact, before the use of idr to store the
      ipcs, the ipcs were stored in tables of variable length, depending of the
      maximum number of ipc allowed.  Now, these 'struct ipc_ids' have a fixed
      size.  As they are allocated in any cases for each new ipc_namespace, there
      is no gain of memory in having them allocated separately of the struct
      ipc_namespace.
      
      This patch proposes to make this table static in the struct ipc_namespace.
      Thus, we can allocate all in once and get rid of all the code needed to
      allocate and free these ipc_ids separately.
      Signed-off-by: NPierre Peiffer <pierre.peiffer@bull.net>
      Acked-by: NCedric Le Goater <clg@fr.ibm.com>
      Cc: Pavel Emelyanov <xemul@openvz.org>
      Cc: Nadia Derbey <Nadia.Derbey@bull.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      ed2ddbf8
    • P
      ipc: uninline some code from util.h · b2d75cdd
      Pavel Emelyanov 提交于
      ipc_lock_check_down(), ipc_lock_check() and ipcget() seem too large to be
      inline.  Besides, they give no optimization being inline as they perform
      calls inside in any case.
      
      Moving them into ipc/util.c saves 500 bytes of vmlinux and shortens IPC
      internal API.
      
      $ ./scripts/bloat-o-meter vmlinux-orig vmlinux
      add/remove: 3/2 grow/shrink: 0/10 up/down: 490/-989 (-499)
      function                                     old     new   delta
      ipcget                                         -     392    +392
      ipc_lock_check_down                            -      49     +49
      ipc_lock_check                                 -      49     +49
      sys_semget                                   119     105     -14
      sys_shmget                                   108      86     -22
      sys_msgget                                   100      78     -22
      do_msgsnd                                    665     631     -34
      do_msgrcv                                    680     644     -36
      do_shmat                                     771     733     -38
      sys_msgctl                                  1302    1229     -73
      ipcget_new                                    80       -     -80
      sys_semtimedop                              1534    1452     -82
      sys_semctl                                  2034    1922    -112
      sys_shmctl                                  1919    1765    -154
      ipcget_public                                322       -    -322
      
      The ipcget() growth is the result of gcc inlining of currently static
      ipcget_new/_public.
      Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
      Cc: Nadia Derbey <Nadia.Derbey@bull.net>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      b2d75cdd
    • P
      namespaces: move the IPC namespace under IPC_NS option · ae5e1b22
      Pavel Emelyanov 提交于
      Currently the IPC namespace management code is spread over the ipc/*.c files.
      I moved this code into ipc/namespace.c file which is compiled out when needed.
      
      The linux/ipc_namespace.h file is used to store the prototypes of the
      functions in namespace.c and the stubs for NAMESPACES=n case.  This is done
      so, because the stub for copy_ipc_namespace requires the knowledge of the
      CLONE_NEWIPC flag, which is in sched.h.  But the linux/ipc.h file itself in
      included into many many .c files via the sys.h->sem.h sequence so adding the
      sched.h into it will make all these .c depend on sched.h which is not that
      good.  On the other hand the knowledge about the namespaces stuff is required
      in 4 .c files only.
      
      Besides, this patch compiles out some auxiliary functions from ipc/sem.c,
      msg.c and shm.c files.  It turned out that moving these functions into
      namespaces.c is not that easy because they use many other calls and macros
      from the original file.  Moving them would make this patch complicated.  On
      the other hand all these functions can be consolidated, so I will send a
      separate patch doing this a bit later.
      Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
      Acked-by: NSerge Hallyn <serue@us.ibm.com>
      Cc: Cedric Le Goater <clg@fr.ibm.com>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Herbert Poetzl <herbert@13thfloor.at>
      Cc: Kirill Korotaev <dev@sw.ru>
      Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      ae5e1b22