lkml.org 
[lkml]   [2008]   [Feb]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] mmu notifiers #v6
    On Wed, Feb 20, 2008 at 11:39:42AM +0100, Andrea Arcangeli wrote:
    > XPMEM simply can't use RCU for the registration locking if it wants to
    > schedule inside the mmu notifier calls. So I guess it's better to add

    Whoa there. In Christoph's patch, we did not use rcu for the list. It
    was a simple hlist_head. The list manipulations were done under
    down_write(&current->mm->mmap_sem) and would therefore not be racy. All
    the callout locations are already acquiring the mmap_sem at least
    readably, so we should be safe. Maybe I missed a race somewhere.

    Thanks,
    Robin


    \
     
     \ /
      Last update: 2008-02-20 15:45    [W:0.021 / U:32.272 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site