From: Brian Foster <bfoster@redhat.com>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH 13/19] xfs: refactor delalloc accounting in xfs_bmap_add_extent_delay_real
Date: Tue, 19 Sep 2017 12:35:28 -0400 [thread overview]
Message-ID: <20170919163528.GK3487@bfoster.bfoster> (raw)
In-Reply-To: <20170918152422.24345-14-hch@lst.de>
On Mon, Sep 18, 2017 at 08:24:16AM -0700, Christoph Hellwig wrote:
> Account for all changes to the delalloc reservation in da_new, and use a
> single call xfs_mod_fdblocks to reserve/free blocks, including always
> checking for an error.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
Reviewed-by: Brian Foster <bfoster@redhat.com>
> fs/xfs/libxfs/xfs_bmap.c | 32 +++++++++-----------------------
> 1 file changed, 9 insertions(+), 23 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
> index 731854cc8b58..dbf87add4d6b 100644
> --- a/fs/xfs/libxfs/xfs_bmap.c
> +++ b/fs/xfs/libxfs/xfs_bmap.c
> @@ -1587,7 +1587,6 @@ xfs_bmap_add_extent_delay_real(
> int whichfork)
> {
> struct xfs_bmbt_irec *new = &bma->got;
> - int diff; /* temp value */
> int error; /* error return value */
> int i; /* temp state */
> xfs_ifork_t *ifp; /* inode fork pointer */
> @@ -2085,17 +2084,6 @@ xfs_bmap_add_extent_delay_real(
>
> da_new = startblockval(PREV.br_blockcount) +
> startblockval(RIGHT.br_blockcount);
> - diff = da_new - startblockval(old.br_startblock);
> - if (bma->cur)
> - diff += bma->cur->bc_private.b.allocated;
> - if (diff > 0) {
> - error = xfs_mod_fdblocks(bma->ip->i_mount,
> - -((int64_t)diff), false);
> - ASSERT(!error);
> - if (error)
> - goto done;
> - }
> -
> bma->idx++;
> break;
>
> @@ -2130,19 +2118,17 @@ xfs_bmap_add_extent_delay_real(
> goto done;
> }
>
> - /* adjust for changes in reserved delayed indirect blocks */
> - if (da_old || da_new) {
> - temp = da_new;
> - if (bma->cur)
> - temp += bma->cur->bc_private.b.allocated;
> - if (temp < da_old)
> - xfs_mod_fdblocks(bma->ip->i_mount,
> - (int64_t)(da_old - temp), false);
> + if (bma->cur) {
> + da_new += bma->cur->bc_private.b.allocated;
> + bma->cur->bc_private.b.allocated = 0;
> }
>
> - /* clear out the allocated field, done with it now in any case. */
> - if (bma->cur)
> - bma->cur->bc_private.b.allocated = 0;
> + /* adjust for changes in reserved delayed indirect blocks */
> + if (da_new != da_old) {
> + ASSERT(state == 0 || da_new < da_old);
> + error = xfs_mod_fdblocks(mp, (int64_t)(da_old - da_new),
> + false);
> + }
>
> xfs_bmap_check_leaf_extents(bma->cur, bma->ip, whichfork);
> done:
> --
> 2.14.1
>
> --
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next prev parent reply other threads:[~2017-09-19 16:35 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-18 15:24 refactor extent manipulation V3 Christoph Hellwig
2017-09-18 15:24 ` [PATCH 01/19] xfs: fix incorrect extent state in xfs_bmap_add_extent_unwritten_real Christoph Hellwig
2017-09-20 21:20 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 02/19] xfs: use xfs_iext_get_extent instead of open coding it Christoph Hellwig
2017-09-20 21:20 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 03/19] xfs: don't set XFS_BTCUR_BPRV_WASDEL in xfs_bunmapi Christoph Hellwig
2017-09-20 21:29 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 04/19] xfs: rename bno to end in __xfs_bunmapi Christoph Hellwig
2017-09-20 21:30 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 05/19] xfs: use xfs_bmap_del_extent_delay for the data fork as well Christoph Hellwig
2017-09-20 21:46 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 06/19] xfs: move some more code into xfs_bmap_del_extent_real Christoph Hellwig
2017-09-20 21:37 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 07/19] xfs: use correct state defines in xfs_bmap_del_extent_{cow,delay} Christoph Hellwig
2017-09-20 21:38 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 08/19] xfs: use the state defines in xfs_bmap_del_extent_real Christoph Hellwig
2017-09-20 21:41 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 09/19] xfs: refactor xfs_del_extent_real Christoph Hellwig
2017-09-20 21:42 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 10/19] xfs: refactor xfs_bmap_add_extent_hole_delay Christoph Hellwig
2017-09-20 21:44 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 11/19] xfs: refactor xfs_bmap_add_extent_hole_real Christoph Hellwig
2017-09-20 21:45 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 12/19] xfs: refactor xfs_bmap_add_extent_delay_real Christoph Hellwig
2017-09-19 16:35 ` Brian Foster
2017-09-21 13:27 ` Christoph Hellwig
2017-09-21 13:52 ` Brian Foster
2017-09-20 22:03 ` Darrick J. Wong
2017-09-21 13:28 ` Christoph Hellwig
2017-09-21 16:01 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 13/19] xfs: refactor delalloc accounting in xfs_bmap_add_extent_delay_real Christoph Hellwig
2017-09-19 16:35 ` Brian Foster [this message]
2017-09-20 22:12 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 14/19] xfs: refactor xfs_bmap_add_extent_unwritten_real Christoph Hellwig
2017-09-20 22:22 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 15/19] xfs: pass a struct xfs_bmbt_irec to xfs_bmbt_update Christoph Hellwig
2017-09-20 22:24 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 16/19] xfs: pass a struct xfs_bmbt_irec to xfs_bmbt_lookup_eq Christoph Hellwig
2017-09-20 22:27 ` Darrick J. Wong
2017-09-21 13:23 ` Christoph Hellwig
2017-09-21 15:34 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 17/19] xfs: replace xfs_bmbt_lookup_ge with xfs_bmbt_lookup_first Christoph Hellwig
2017-09-20 22:27 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 18/19] xfs: remove all xfs_bmbt_set_* helpers except for xfs_bmbt_set_all Christoph Hellwig
2017-09-20 22:27 ` Darrick J. Wong
2017-09-18 15:24 ` [PATCH 19/19] xfs: remove xfs_bmbt_get_state Christoph Hellwig
2017-09-20 22:28 ` Darrick J. Wong
-- strict thread matches above, loose matches on Subject: below --
2017-09-22 13:59 refactor extent manipulation V4 Christoph Hellwig
2017-09-22 13:59 ` [PATCH 13/19] xfs: refactor delalloc accounting in xfs_bmap_add_extent_delay_real Christoph Hellwig
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