From 1a2781cfa5ed8eb82bb311d684f268c1822dae69 Mon Sep 17 00:00:00 2001 From: Fabio Massimo Di Nitto Date: Fri, 16 Nov 2007 09:50:40 +0000 Subject: [PATCH] [GFS2] Fix runtime issue with UP kernels The issue is indeed UP vs SMP and it is totally random. spin_is_locked() is a bad assertion because there is no correct answer on UP. on UP spin_is_locked() has to return either one value or another, always. This means that in my setup I am lucky enough to trigger the issue and your you are lucky enough not to. the patch in attachment removes the bogus calls to BUG_ON and according to David (in CC and thanks for the long explanation on the problem) we can rely upon things like lockdep to find problem that might be trying to catch. Signed-off-by: Fabio M. Di Nitto Cc: David S. Miller Signed-off-by: Steven Whitehouse --- fs/gfs2/glock.c | 3 --- fs/gfs2/log.c | 2 -- 2 files changed, 5 deletions(-) diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index d83df6888402..a7f3c462d4fe 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -217,7 +217,6 @@ int gfs2_glock_put(struct gfs2_glock *gl) if (atomic_dec_and_test(&gl->gl_ref)) { hlist_del(&gl->gl_list); write_unlock(gl_lock_addr(gl->gl_hash)); - BUG_ON(spin_is_locked(&gl->gl_spin)); gfs2_assert(sdp, gl->gl_state == LM_ST_UNLOCKED); gfs2_assert(sdp, list_empty(&gl->gl_reclaim)); gfs2_assert(sdp, list_empty(&gl->gl_holders)); @@ -460,7 +459,6 @@ static void wait_on_holder(struct gfs2_holder *gh) static void gfs2_demote_wake(struct gfs2_glock *gl) { - BUG_ON(!spin_is_locked(&gl->gl_spin)); gl->gl_demote_state = LM_ST_EXCLUSIVE; clear_bit(GLF_DEMOTE, &gl->gl_flags); smp_mb__after_clear_bit(); @@ -680,7 +678,6 @@ static void gfs2_glmutex_unlock(struct gfs2_glock *gl) gl->gl_owner_pid = 0; gl->gl_ip = 0; run_queue(gl); - BUG_ON(!spin_is_locked(&gl->gl_spin)); spin_unlock(&gl->gl_spin); } diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c index 4dcc7a8cda22..96dcf050e6c9 100644 --- a/fs/gfs2/log.c +++ b/fs/gfs2/log.c @@ -92,8 +92,6 @@ static void gfs2_ail1_start_one(struct gfs2_sbd *sdp, struct gfs2_ail *ai) struct buffer_head *bh; int retry; - BUG_ON(!spin_is_locked(&sdp->sd_log_lock)); - do { retry = 0; -- 2.20.1