Eric Lee / smarc-fsl-linux-kernel

28 Mar, 2007

1 commit

  • d75e26a82   [PATCH] uml: fix epoll ... Browse Code »

    UML/x86_64 needs the same packing of struct epoll_event as x86_64.

    Signed-off-by: Jeff Dike
    Cc: Davide Libenzi
    Cc:
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Jeff Dike
     

26 Jun, 2006

1 commit

  • 3419b23a9   [PATCH] epoll: use unlocked wqueue operations ... Browse Code »

    A few days ago Arjan signaled a lockdep red flag on epoll locks, and
    precisely between the epoll's device structure lock (->lock) and the wait
    queue head lock (->lock).

    Like I explained in another email, and directly to Arjan, this can't happen
    in reality because of the explicit check at eventpoll.c:592, that does not
    allow to drop an epoll fd inside the same epoll fd. Since lockdep is
    working on per-structure locks, it will never be able to know of policies
    enforced in other parts of the code.

    It was decided time ago of having the ability to drop epoll fds inside
    other epoll fds, that triggers a very trick wakeup operations (due to
    possibly reentrant callback-driven wakeups) handled by the
    ep_poll_safewake() function. While looking again at the code though, I
    noticed that all the operations done on the epoll's main structure wait
    queue head (->wq) are already protected by the epoll lock (->lock), so that
    locked-style functions can be used to manipulate the ->wq member. This
    makes both a lock-acquire save, and lockdep happy.

    Running totalmess on my dual opteron for a while did not reveal any problem
    so far:

    http://www.xmailserver.org/totalmess.c

    Signed-off-by: Davide Libenzi
    Cc: Arjan van de Ven
    Cc: Ingo Molnar
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Davide Libenzi
     

23 Mar, 2006

1 commit

  • 5a6b7951b   [PATCH] get_empty_filp tweaks, inline epoll_init_file() ... Browse Code »

    Eliminate a handful of cache references by keeping current in a register
    instead of reloading (helps x86) and avoiding the overhead of a function
    call. Inlining eventpoll_init_file() saves 24 bytes. Also reorder file
    initialization to make writes occur more sequentially.

    Signed-off-by: Benjamin LaHaise
    Cc: Davide Libenzi
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Benjamin LaHaise
     

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds