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xfs: unlock the AGI buffer when looping in xfs_dialloc

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Also update some commens in the area to make the code easier to read.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Christoph Hellwig 2012-08-07 02:02:02 -04:00 committed by Ben Myers
parent 0b9e3f6d84
commit 7612903099
1 changed files with 9 additions and 8 deletions
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17
fs/xfs/xfs_ialloc.c
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@ -962,23 +962,22 @@ xfs_dialloc(
if (!pag->pagi_freecount && !okalloc) if (!pag->pagi_freecount && !okalloc)
goto nextag; goto nextag;
/*
* Then read in the AGI buffer and recheck with the AGI buffer
* lock held.
*/
error = xfs_ialloc_read_agi(mp, tp, agno, &agbp); error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
if (error) if (error)
goto out_error; goto out_error;
/*
* Once the AGI has been read in we have to recheck
* pagi_freecount with the AGI buffer lock held.
*/
if (pag->pagi_freecount) { if (pag->pagi_freecount) {
xfs_perag_put(pag); xfs_perag_put(pag);
goto out_alloc; goto out_alloc;
} }
if (!okalloc) { if (!okalloc)
xfs_trans_brelse(tp, agbp); goto nextag_relse_buffer;
goto nextag;
}
error = xfs_ialloc_ag_alloc(tp, agbp, &ialloced); error = xfs_ialloc_ag_alloc(tp, agbp, &ialloced);
if (error) { if (error) {
@ -1007,6 +1006,8 @@ xfs_dialloc(
return 0; return 0;
} }
nextag_relse_buffer:
xfs_trans_brelse(tp, agbp);
nextag: nextag:
xfs_perag_put(pag); xfs_perag_put(pag);
if (++agno == mp->m_sb.sb_agcount) if (++agno == mp->m_sb.sb_agcount)