From: Bob Peterson Date: Thu, 26 Jun 2014 14:46:25 +0000 (-0400) Subject: GFS2: Allow flocks to use normal glock dq rather than dq_wait X-Git-Tag: v3.16-rc6~23^2~3 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=5bef3e7cf18c56cc733777c61b6b61a0b8a62b35;p=karo-tx-linux.git GFS2: Allow flocks to use normal glock dq rather than dq_wait This patch allows flock glocks to use a non-blocking dequeue rather than dq_wait. It also reverts the previous patch I had posted regarding dq_wait. The reverted patch isn't necessarily a bad idea, but I decided this might avoid unforeseen side effects, and was therefore safer. Signed-off-by: Bob Peterson Signed-off-by: Steven Whitehouse --- diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c index 4fc3a3046174..491e8e023598 100644 --- a/fs/gfs2/file.c +++ b/fs/gfs2/file.c @@ -991,7 +991,7 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl) goto out; flock_lock_file_wait(file, &(struct file_lock){.fl_type = F_UNLCK}); - gfs2_glock_dq_wait(fl_gh); + gfs2_glock_dq(fl_gh); gfs2_holder_reinit(state, flags, fl_gh); } else { error = gfs2_glock_get(GFS2_SB(&ip->i_inode), ip->i_no_addr, diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index b703dcc91588..ee4e04fe60fc 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -1128,9 +1128,7 @@ void gfs2_glock_dq_wait(struct gfs2_holder *gh) struct gfs2_glock *gl = gh->gh_gl; gfs2_glock_dq(gh); might_sleep(); - if (!find_first_holder(gl)) - wait_on_bit(&gl->gl_flags, GLF_DEMOTE, gfs2_glock_demote_wait, - TASK_UNINTERRUPTIBLE); + wait_on_bit(&gl->gl_flags, GLF_DEMOTE, gfs2_glock_demote_wait, TASK_UNINTERRUPTIBLE); } /**