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[GFS2] Patch to protect sd_log_num_jdata

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This is a patch to GFS2 to protect sd_log_num_jdata with the
gfs2_log_lock.  Without this patch, there is a timing window
where you can get hit the following assert from function
gfs2_log_flush():

gfs2_assert_withdraw(sdp,
			sdp->sd_log_num_buf + sdp->sd_log_num_jdata ==
			sdp->sd_log_commited_buf +
			sdp->sd_log_commited_databuf);

I've tested it on my roth cluster and it fixes the problem.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson 2007-08-22 11:15:29 -05:00 committed by Steven Whitehouse
parent a947e03356
commit ec217e0ece
1 changed files with 2 additions and 1 deletions
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3
fs/gfs2/lops.c
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@ -492,11 +492,12 @@ static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
gfs2_trans_add_gl(bd->bd_gl);
if (gfs2_is_jdata(ip)) {
sdp->sd_log_num_jdata++;
gfs2_pin(sdp, bd->bd_bh);
tr->tr_num_databuf_new++;
}
gfs2_log_lock(sdp);
if (gfs2_is_jdata(ip))
sdp->sd_log_num_jdata++;
sdp->sd_log_num_databuf++;
list_add(&le->le_list, &sdp->sd_log_le_databuf);
gfs2_log_unlock(sdp);