lkml.org 
[lkml]   [2008]   [Nov]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH 2/5] x86: ret_from_fork - get rid of jump back
    From
    Date
    gorcunov@gmail.com writes:
    > --- a/arch/x86/kernel/entry_64.S
    > +++ b/arch/x86/kernel/entry_64.S
    > @@ -379,7 +379,10 @@ ENTRY(ret_from_fork)
    > GET_THREAD_INFO(%rcx)
    > testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%rcx)
    > CFI_REMEMBER_STATE
    > - jnz rff_trace
    > + jz rff_action
    > + movq %rsp,%rdi
    > + call syscall_trace_leave
    > + GET_THREAD_INFO(%rcx)

    The uncommon path is supposed to be out of line. I don't think
    the CPU will like that.

    -Andi

    > rff_action:

    --
    ak@linux.intel.com


    \
     
     \ /
      Last update: 2008-11-26 21:07    [W:3.070 / U:0.352 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site