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xfs: grab the per-ag structure whenever relevant

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Grab and hold the per-AG data across a scrub run whenever relevant.
This helps us avoid repeated trips through rcu and the radix tree
in the repair code.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-05-29 22:24:44 -07:00
parent 05edd888d1
commit 51863d7dd7
3 changed files with 19 additions and 0 deletions
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17
fs/xfs/scrub/common.c
View File

@ -541,6 +541,10 @@ xfs_scrub_ag_free(
xfs_trans_brelse(sc->tp, sa->agi_bp);
sa->agi_bp = NULL;
}
if (sa->pag) {
xfs_perag_put(sa->pag);
sa->pag = NULL;
}
sa->agno = NULLAGNUMBER;
}
@ -568,6 +572,19 @@ xfs_scrub_ag_init(
return xfs_scrub_ag_btcur_init(sc, sa);
}
/*
* Grab the per-ag structure if we haven't already gotten it. Teardown of the
* xfs_scrub_ag will release it for us.
*/
void
xfs_scrub_perag_get(
struct xfs_mount *mp,
struct xfs_scrub_ag *sa)
{
if (!sa->pag)
sa->pag = xfs_perag_get(mp, sa->agno);
}
/* Per-scrubber setup functions */
/*

1
fs/xfs/scrub/common.h
View File

@ -123,6 +123,7 @@ xfs_scrub_setup_quota(struct xfs_scrub_context *sc, struct xfs_inode *ip)
void xfs_scrub_ag_free(struct xfs_scrub_context *sc, struct xfs_scrub_ag *sa);
int xfs_scrub_ag_init(struct xfs_scrub_context *sc, xfs_agnumber_t agno,
struct xfs_scrub_ag *sa);
void xfs_scrub_perag_get(struct xfs_mount *mp, struct xfs_scrub_ag *sa);
int xfs_scrub_ag_read_headers(struct xfs_scrub_context *sc, xfs_agnumber_t agno,
struct xfs_buf **agi, struct xfs_buf **agf,
struct xfs_buf **agfl);

1
fs/xfs/scrub/scrub.h
View File

@ -51,6 +51,7 @@ struct xfs_scrub_meta_ops {
/* Buffer pointers and btree cursors for an entire AG. */
struct xfs_scrub_ag {
xfs_agnumber_t agno;
struct xfs_perag *pag;
/* AG btree roots */
struct xfs_buf *agf_bp;