Eric Lee / smarc-fsl-linux-kernel

05 Nov, 2009

1 commit

  • d94d9fee9   net: cleanup include/linux ... Browse Code »

    This cleanup patch puts struct/union/enum opening braces,
    in first line to ease grep games.

    struct something
    {

    becomes :

    struct something {

    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

18 Aug, 2009

1 commit

  • c1a8f1f1c   net: restore gnet_stats_basic to previous definition ... Browse Code »

    In 5e140dfc1fe87eae27846f193086724806b33c7d "net: reorder struct Qdisc
    for better SMP performance" the definition of struct gnet_stats_basic
    changed incompatibly, as copies of this struct are shipped to
    userland via netlink.

    Restoring old behavior is not welcome, for performance reason.

    Fix is to use a private structure for kernel, and
    teach gnet_stats_copy_basic() to convert from kernel to user land,
    using legacy structure (struct gnet_stats_basic)

    Based on a report and initial patch from Michael Spang.

    Reported-by: Michael Spang
    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

20 Mar, 2009

1 commit

  • 5e140dfc1   net: reorder struct Qdisc for better SMP performance ... Browse Code »

    dev_queue_xmit() needs to dirty fields "state", "q", "bstats" and "qstats"

    On x86_64 arch, they currently span three cache lines, involving more
    cache line ping pongs than necessary, making longer holding of queue spinlock.

    We can reduce this to one cache line, by grouping all read-mostly fields
    at the beginning of structure. (Or should I say, all highly modified fields
    at the end :) )

    Before patch :

    offsetof(struct Qdisc, state)=0x38
    offsetof(struct Qdisc, q)=0x48
    offsetof(struct Qdisc, bstats)=0x80
    offsetof(struct Qdisc, qstats)=0x90
    sizeof(struct Qdisc)=0xc8

    After patch :

    offsetof(struct Qdisc, state)=0x80
    offsetof(struct Qdisc, q)=0x88
    offsetof(struct Qdisc, bstats)=0xa0
    offsetof(struct Qdisc, qstats)=0xac
    sizeof(struct Qdisc)=0xc0

    Signed-off-by: Eric Dumazet
    Signed-off-by: David S. Miller

    Eric Dumazet
     

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