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gfs2: Use a tighter bound in gfs2_trans_begin

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Use a tighter bound for the number of blocks required by transactions in
gfs2_trans_begin: in the worst case, we'll have mixed data and metadata,
so we'll need a log desciptor for each type.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2020-12-06 14:04:36 +01:00
parent 5ae8fff8d0
commit 297de3180d
1 changed files with 8 additions and 2 deletions
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10
fs/gfs2/trans.c
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@ -54,8 +54,14 @@ int __gfs2_trans_begin(struct gfs2_trans *tr, struct gfs2_sbd *sdp,
tr->tr_blocks = blocks;
tr->tr_revokes = revokes;
tr->tr_reserved = 1;
if (blocks)
tr->tr_reserved += 6 + blocks;
if (blocks) {
/*
* The reserved blocks are either used for data or metadata.
* We can have mixed data and metadata, each with its own log
* descriptor block; see calc_reserved().
*/
tr->tr_reserved += blocks + 1 + DIV_ROUND_UP(blocks - 1, databuf_limit(sdp));
}
if (revokes)
tr->tr_reserved += gfs2_struct2blk(sdp, revokes);
INIT_LIST_HEAD(&tr->tr_databuf);