lkml.org 
[lkml]   [2011]   [Jan]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: [patch] fs: aio fix rcu lookup
    Date
    Jeff Moyer <jmoyer@redhat.com> writes:

    > Jan Kara <jack@suse.cz> writes:
    >
    >> But there's the second race I describe making it possible
    >> for new IO to be created after io_destroy() has waited for all IO to
    >> finish...
    >
    > Can't that be solved by introducing memory barriers around the accesses
    > to ->dead?

    Upon further consideration, I don't think so.

    Given the options, I think adding the synchronize rcu to the io_destroy
    path is the best way forward. You're already waiting for a bunch of
    queued I/O to finish, so there is no guarantee that you're going to
    finish that call quickly.

    Cheers,
    Jeff


    \
     
     \ /
      Last update: 2011-01-19 20:49    [W:0.019 / U:0.740 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site