• Andrew Morton's avatar
    [PATCH] pdflush: handle resume wakeups · d616e09a
    Andrew Morton authored
    pdflush is carefully designed to ensure that all wakeups have some
    corresponding work to do - if a woken-up pdflush thread discovers that it
    hasn't been given any work to do then this is considered an error.
    That all broke when swsusp came along - because a timer-delivered wakeup to a
    frozen pdflush thread will just get lost.  This causes the pdflush thread to
    get lost as well: the writeback timer is supposed to be re-armed by pdflush in
    process context, but pdflush doesn't execute the callout which does this.
    Fix that up by ignoring the return value from try_to_freeze(): jsut proceed,
    see if we have any work pending and only go back to sleep if that is not the
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
pdflush.c 6.32 KB