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GFS2: Rework reclaiming unlinked dinodes

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The previous patch I wrote for reclaiming unlinked dinodes
had some shortcomings and did not prevent all hangs.
This version is much cleaner and more logical, and has
passed very difficult testing.  Sorry for the churn.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson
2010-05-20 23:30:11 -04:00
committed by Steven Whitehouse
parent d7dbf4ffee
commit ed4878e8a4
5 changed files with 54 additions and 54 deletions
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20
fs/gfs2/rgrp.c
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@@ -1191,7 +1191,6 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_alloc *al = ip->i_alloc;
struct inode *inode;
int error = 0;
u64 last_unlinked = NO_BLOCK, unlinked;
@@ -1209,22 +1208,27 @@ try_again:
if (error)
return error;
/* Find an rgrp suitable for allocation. If it encounters any unlinked
dinodes along the way, error will equal -EAGAIN and unlinked will
contains it block address. We then need to look up that inode and
try to free it, and try the allocation again. */
error = get_local_rgrp(ip, &unlinked, &last_unlinked);
if (error) {
if (ip != GFS2_I(sdp->sd_rindex))
gfs2_glock_dq_uninit(&al->al_ri_gh);
if (error != -EAGAIN)
return error;
error = gfs2_unlinked_inode_lookup(ip->i_inode.i_sb,
unlinked, &inode);
if (inode)
iput(inode);
gfs2_process_unlinked_inode(ip->i_inode.i_sb, unlinked);
/* regardless of whether or not gfs2_process_unlinked_inode
was successful, we don't want to repeat it again. */
last_unlinked = unlinked;
gfs2_log_flush(sdp, NULL);
if (error == GLR_TRYFAILED)
error = 0;
error = 0;
goto try_again;
}
/* no error, so we have the rgrp set in the inode's allocation. */
al->al_file = file;
al->al_line = line;