From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bob Peterson Date: Thu, 12 Jul 2007 16:58:50 -0500 Subject: [Cluster-devel] [PATCH][GFS2] bz #246114: GFS2: soft lockup in rgblk_search Message-ID: <1184277530.517.13.camel@technetium.msp.redhat.com> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit This patch seems to fix the problem described in bugzilla bug 246114. It was written by Steve Whitehouse with some tweaking by me. The code was looping in the relatively new section of code designed to search for and reuse unlinked inodes. In cases where it was finding an appropriate inode to reuse, it was looping around and finding the same block over and over because a "<=" check should have been a "<" when comparing the goal block to the last unlinked block found. Regards, Bob Peterson Red Hat Cluster Suite Signed-off-by: Bob Peterson -- fs/gfs2/rgrp.c | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-) diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index e4e0406..bb58e69 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -863,16 +863,19 @@ static struct inode *try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked) u64 no_addr; for(;;) { + if (goal >= rgd->rd_data) + break; goal = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED, GFS2_BLKST_UNLINKED); if (goal == 0) - return 0; + break; no_addr = goal + rgd->rd_data0; - if (no_addr <= *last_unlinked) + goal++; + if (no_addr < *last_unlinked) continue; *last_unlinked = no_addr; inode = gfs2_inode_lookup(rgd->rd_sbd->sd_vfs, DT_UNKNOWN, - no_addr, -1); + no_addr, -1); if (!IS_ERR(inode)) return inode; }