1. 09 2月, 2008 7 次提交
    • P
      Pidns: fix badly converted mqueues pid handling · 56496c1d
      Pavel Emelyanov 提交于
      When sending the pid namespaces patches I wrongly converted the tsk->tgid into
      task_pid_vnr(tsk) in mqueue-s (the git id of this patch is
      b488893a).
      
      The proper behavior is to get the task_tgid_vnr(tsk).
      
      This seem to be the only mistake of that kind.
      Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Oleg Nesterov <oleg@tv-sign.ru>
      Cc: Balbir Singh <balbir@in.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      56496c1d
    • P
      Pidns: make full use of xxx_vnr() calls · 6c5f3e7b
      Pavel Emelyanov 提交于
      Some time ago the xxx_vnr() calls (e.g.  pid_vnr or find_task_by_vpid) were
      _all_ converted to operate on the current pid namespace.  After this each call
      like xxx_nr_ns(foo, current->nsproxy->pid_ns) is nothing but a xxx_vnr(foo)
      one.
      
      Switch all the xxx_nr_ns() callers to use the xxx_vnr() calls where
      appropriate.
      Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
      Reviewed-by: NOleg Nesterov <oleg@tv-sign.ru>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Balbir Singh <balbir@in.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6c5f3e7b
    • P
      IPC: consolidate sem_exit_ns(), msg_exit_ns() and shm_exit_ns() · 01b8b07a
      Pierre Peiffer 提交于
      sem_exit_ns(), msg_exit_ns() and shm_exit_ns() are all called when an
      ipc_namespace is released to free all ipcs of each type.  But in fact, they
      do the same thing: they loop around all ipcs to free them individually by
      calling a specific routine.
      
      This patch proposes to consolidate this by introducing a common function,
      free_ipcs(), that do the job.  The specific routine to call on each
      individual ipcs is passed as parameter.  For this, these ipc-specific
      'free' routines are reworked to take a generic 'struct ipc_perm' as
      parameter.
      Signed-off-by: NPierre Peiffer <pierre.peiffer@bull.net>
      Cc: Cedric 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>
      01b8b07a
    • 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/semaphores: consolidate SEM_STAT and IPC_STAT commands · 4b9fcb0e
      Pierre Peiffer 提交于
      These commands (SEM_STAT and IPC_STAT) are rather doing the same things
      (only the meaning of the id given as input and the return value differ).
      However, for the semaphores, they are handled in two different places (two
      different functions).
      
      This patch consolidates this for clarification by handling these both
      commands in the same place in semctl_nolock().  It also removes one unused
      parameter for this function.
      Signed-off-by: NPierre Peiffer <pierre.peiffer@bull.net>
      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>
      4b9fcb0e
    • 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
  2. 07 2月, 2008 2 次提交
  3. 30 11月, 2007 1 次提交
  4. 07 11月, 2007 1 次提交
  5. 21 10月, 2007 1 次提交
  6. 20 10月, 2007 14 次提交
  7. 19 10月, 2007 1 次提交
  8. 17 10月, 2007 4 次提交
  9. 11 10月, 2007 1 次提交
  10. 01 8月, 2007 2 次提交
  11. 20 7月, 2007 3 次提交
    • P
      mm: Remove slab destructors from kmem_cache_create(). · 20c2df83
      Paul Mundt 提交于
      Slab destructors were no longer supported after Christoph's
      c59def9f change. They've been
      BUGs for both slab and slub, and slob never supported them
      either.
      
      This rips out support for the dtor pointer from kmem_cache_create()
      completely and fixes up every single callsite in the kernel (there were
      about 224, not including the slab allocator definitions themselves,
      or the documentation references).
      Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      20c2df83
    • N
      mm: fault feedback #1 · d0217ac0
      Nick Piggin 提交于
      Change ->fault prototype.  We now return an int, which contains
      VM_FAULT_xxx code in the low byte, and FAULT_RET_xxx code in the next byte.
       FAULT_RET_ code tells the VM whether a page was found, whether it has been
      locked, and potentially other things.  This is not quite the way he wanted
      it yet, but that's changed in the next patch (which requires changes to
      arch code).
      
      This means we no longer set VM_CAN_INVALIDATE in the vma in order to say
      that a page is locked which requires filemap_nopage to go away (because we
      can no longer remain backward compatible without that flag), but we were
      going to do that anyway.
      
      struct fault_data is renamed to struct vm_fault as Linus asked. address
      is now a void __user * that we should firmly encourage drivers not to use
      without really good reason.
      
      The page is now returned via a page pointer in the vm_fault struct.
      Signed-off-by: NNick Piggin <npiggin@suse.de>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      d0217ac0
    • N
      mm: merge populate and nopage into fault (fixes nonlinear) · 54cb8821
      Nick Piggin 提交于
      Nonlinear mappings are (AFAIKS) simply a virtual memory concept that encodes
      the virtual address -> file offset differently from linear mappings.
      
      ->populate is a layering violation because the filesystem/pagecache code
      should need to know anything about the virtual memory mapping.  The hitch here
      is that the ->nopage handler didn't pass down enough information (ie.  pgoff).
       But it is more logical to pass pgoff rather than have the ->nopage function
      calculate it itself anyway (because that's a similar layering violation).
      
      Having the populate handler install the pte itself is likewise a nasty thing
      to be doing.
      
      This patch introduces a new fault handler that replaces ->nopage and
      ->populate and (later) ->nopfn.  Most of the old mechanism is still in place
      so there is a lot of duplication and nice cleanups that can be removed if
      everyone switches over.
      
      The rationale for doing this in the first place is that nonlinear mappings are
      subject to the pagefault vs invalidate/truncate race too, and it seemed stupid
      to duplicate the synchronisation logic rather than just consolidate the two.
      
      After this patch, MAP_NONBLOCK no longer sets up ptes for pages present in
      pagecache.  Seems like a fringe functionality anyway.
      
      NOPAGE_REFAULT is removed.  This should be implemented with ->fault, and no
      users have hit mainline yet.
      
      [akpm@linux-foundation.org: cleanup]
      [randy.dunlap@oracle.com: doc. fixes for readahead]
      [akpm@linux-foundation.org: build fix]
      Signed-off-by: NNick Piggin <npiggin@suse.de>
      Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
      Cc: Mark Fasheh <mark.fasheh@oracle.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      54cb8821
  12. 18 7月, 2007 1 次提交
  13. 17 7月, 2007 1 次提交
  14. 07 7月, 2007 1 次提交
反馈
建议
客服 返回
顶部