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| author | Steven Whitehouse <swhiteho@redhat.com> | 2011-08-02 13:09:36 +0100 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2011-10-21 12:39:20 +0100 |
| commit | 75549186edf1515062fe2fcbfbd92bd99659afba (patch) | |
| tree | c3942739398fdf76b2cfaa3e5f72575f7fa8d4f8 /fs/gfs2/glops.c | |
| parent | 2f0264d592e34cde99efbad7d616b04af138e913 (diff) | |
| download | linux-3.10-75549186edf1515062fe2fcbfbd92bd99659afba.tar.gz linux-3.10-75549186edf1515062fe2fcbfbd92bd99659afba.tar.bz2 linux-3.10-75549186edf1515062fe2fcbfbd92bd99659afba.zip | |
GFS2: Fix bug-trap in ail flush code
The assert was being tested under the wrong lock, a
legacy of the original code. Also, if it does trigger,
the resulting information was not always a lot of help.
This moves the patch under the correct lock and also
prints out more useful information in tacking down the
source of the problem.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/glops.c')
| -rw-r--r-- | fs/gfs2/glops.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c index da21ecaafcc..99df4832f94 100644 --- a/fs/gfs2/glops.c +++ b/fs/gfs2/glops.c @@ -28,6 +28,17 @@ #include "trans.h" #include "dir.h" +static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh) +{ + fs_err(gl->gl_sbd, "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page state 0x%lx\n", + bh, (unsigned long long)bh->b_blocknr, bh->b_state, + bh->b_page->mapping, bh->b_page->flags); + fs_err(gl->gl_sbd, "AIL glock %u:%llu mapping %p\n", + gl->gl_name.ln_type, gl->gl_name.ln_number, + gfs2_glock2aspace(gl)); + gfs2_lm_withdraw(gl->gl_sbd, "AIL error\n"); +} + /** * __gfs2_ail_flush - remove all buffers for a given lock from the AIL * @gl: the glock @@ -41,20 +52,24 @@ static void __gfs2_ail_flush(struct gfs2_glock *gl) struct list_head *head = &gl->gl_ail_list; struct gfs2_bufdata *bd; struct buffer_head *bh; + sector_t blocknr; spin_lock(&sdp->sd_ail_lock); while (!list_empty(head)) { bd = list_entry(head->next, struct gfs2_bufdata, bd_ail_gl_list); bh = bd->bd_bh; - gfs2_remove_from_ail(bd); - bd->bd_bh = NULL; + blocknr = bh->b_blocknr; + if (buffer_busy(bh)) + gfs2_ail_error(gl, bh); bh->b_private = NULL; + gfs2_remove_from_ail(bd); /* drops ref on bh */ spin_unlock(&sdp->sd_ail_lock); - bd->bd_blkno = bh->b_blocknr; + bd->bd_bh = NULL; + bd->bd_blkno = blocknr; + gfs2_log_lock(sdp); - gfs2_assert_withdraw(sdp, !buffer_busy(bh)); gfs2_trans_add_revoke(sdp, bd); gfs2_log_unlock(sdp); |