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xfs: remove xfs_defer_agfl_block

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xfs_free_extent_later can handle the extra AGFL special casing with
very little extra logic.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Christoph Hellwig 2024-07-02 11:22:56 -07:00 committed by Darrick J. Wong
parent 851a678189
commit 7272f77c67
1 changed files with 22 additions and 46 deletions
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68
fs/xfs/libxfs/xfs_alloc.c
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@ -2509,48 +2509,6 @@ xfs_agfl_reset(
clear_bit(XFS_AGSTATE_AGFL_NEEDS_RESET, &pag->pag_opstate);
}
/*
* Defer an AGFL block free. This is effectively equivalent to
* xfs_free_extent_later() with some special handling particular to AGFL blocks.
*
* Deferring AGFL frees helps prevent log reservation overruns due to too many
* allocation operations in a transaction. AGFL frees are prone to this problem
* because for one they are always freed one at a time. Further, an immediate
* AGFL block free can cause a btree join and require another block free before
* the real allocation can proceed. Deferring the free disconnects freeing up
* the AGFL slot from freeing the block.
*/
static int
xfs_defer_agfl_block(
struct xfs_trans *tp,
xfs_agnumber_t agno,
xfs_agblock_t agbno,
struct xfs_owner_info *oinfo)
{
struct xfs_mount *mp = tp->t_mountp;
struct xfs_extent_free_item *xefi;
xfs_fsblock_t fsbno = XFS_AGB_TO_FSB(mp, agno, agbno);
ASSERT(xfs_extfree_item_cache != NULL);
ASSERT(oinfo != NULL);
if (XFS_IS_CORRUPT(mp, !xfs_verify_fsbno(mp, fsbno)))
return -EFSCORRUPTED;
xefi = kmem_cache_zalloc(xfs_extfree_item_cache,
GFP_KERNEL | __GFP_NOFAIL);
xefi->xefi_startblock = fsbno;
xefi->xefi_blockcount = 1;
xefi->xefi_owner = oinfo->oi_owner;
xefi->xefi_agresv = XFS_AG_RESV_AGFL;
trace_xfs_agfl_free_defer(mp, xefi);
xfs_extent_free_get_group(mp, xefi);
xfs_defer_add(tp, &xefi->xefi_list, &xfs_agfl_free_defer_type);
return 0;
}
/*
* Add the extent to the list of extents to be free at transaction end.
* The list is maintained sorted (by block number).
@ -2571,7 +2529,6 @@ xfs_defer_extent_free(
ASSERT(len <= XFS_MAX_BMBT_EXTLEN);
ASSERT(!isnullstartblock(bno));
ASSERT(!(free_flags & ~XFS_FREE_EXTENT_ALL_FLAGS));
ASSERT(type != XFS_AG_RESV_AGFL);
if (XFS_IS_CORRUPT(mp, !xfs_verify_fsbext(mp, bno, len)))
return -EFSCORRUPTED;
@ -2598,7 +2555,13 @@ xfs_defer_extent_free(
trace_xfs_extent_free_defer(mp, xefi);
xfs_extent_free_get_group(mp, xefi);
*dfpp = xfs_defer_add(tp, &xefi->xefi_list, &xfs_extent_free_defer_type);
if (xefi->xefi_agresv == XFS_AG_RESV_AGFL)
*dfpp = xfs_defer_add(tp, &xefi->xefi_list,
&xfs_agfl_free_defer_type);
else
*dfpp = xfs_defer_add(tp, &xefi->xefi_list,
&xfs_extent_free_defer_type);
return 0;
}
@ -2856,8 +2819,21 @@ xfs_alloc_fix_freelist(
if (error)
goto out_agbp_relse;
/* defer agfl frees */
error = xfs_defer_agfl_block(tp, args->agno, bno, &targs.oinfo);
/*
* Defer the AGFL block free.
*
* This helps to prevent log reservation overruns due to too
* many allocation operations in a transaction. AGFL frees are
* prone to this problem because for one they are always freed
* one at a time. Further, an immediate AGFL block free can
* cause a btree join and require another block free before the
* real allocation can proceed.
* Deferring the free disconnects freeing up the AGFL slot from
* freeing the block.
*/
error = xfs_free_extent_later(tp,
XFS_AGB_TO_FSB(mp, args->agno, bno), 1,
&targs.oinfo, XFS_AG_RESV_AGFL, 0);
if (error)
goto out_agbp_relse;
}