lkml.org 
[lkml]   [2010]   [Jan]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC][PATCH 6/8] mm: handle_speculative_fault()
    On Thu, 7 Jan 2010 14:33:50 -0800 (PST)
    Linus Torvalds <torvalds@linux-foundation.org> wrote:

    >
    >
    > On Thu, 7 Jan 2010, Peter Zijlstra wrote:
    > >
    > > I haven't yet looked at the patch, but isn't expand_stack() kinda like
    > > what you want? That serializes using anon_vma_lock().
    >
    > Yeah, that sounds like the right thing to do. It is the same operation,
    > after all (and has the same effects, especially for the special case of
    > upwards-growing stacks).
    >
    > So basically the idea is to extend that stack expansion to brk(), and
    > possibly mmap() in general.
    >
    Hmm, do_brk() sometimes unmap conflicting mapping. Isn't it be a problem ?
    Stack expansion just fails and SEGV if it hit with other mmaps....

    Thanks,
    -Kame







    \
     
     \ /
      Last update: 2010-01-08 01:29    [W:4.640 / U:0.136 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site