From: Dave Chinner <david@fromorbit.com>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: linux-xfs@vger.kernel.org, chandan.babu@oracle.com, hch@lst.de
Subject: Re: [PATCH 09/15] xfs: dynamically allocate cursors based on maxlevels
Date: Wed, 13 Oct 2021 16:40:41 +1100 [thread overview]
Message-ID: <20211013054041.GB2361455@dread.disaster.area> (raw)
In-Reply-To: <163408160334.4151249.13708314780740357223.stgit@magnolia>
On Tue, Oct 12, 2021 at 04:33:23PM -0700, Darrick J. Wong wrote:
> From: Darrick J. Wong <djwong@kernel.org>
>
> To support future btree code, we need to be able to size btree cursors
> dynamically for very large btrees. Switch the maxlevels computation to
> use the precomputed values in the superblock, and create cursors that
> can handle a certain height. For now, we retain the btree cursor zone
> that can handle up to 9-level btrees, and create larger cursors (which
> shouldn't happen currently) from the heap as a failsafe.
>
> Signed-off-by: Darrick J. Wong <djwong@kernel.org>
> ---
> fs/xfs/libxfs/xfs_alloc_btree.c | 2 +-
> fs/xfs/libxfs/xfs_bmap_btree.c | 3 ++-
> fs/xfs/libxfs/xfs_btree.h | 13 +++++++++++--
> fs/xfs/libxfs/xfs_ialloc_btree.c | 3 ++-
> fs/xfs/libxfs/xfs_refcount_btree.c | 3 ++-
> fs/xfs/libxfs/xfs_rmap_btree.c | 3 ++-
> fs/xfs/xfs_super.c | 4 ++--
> 7 files changed, 22 insertions(+), 9 deletions(-)
minor nit:
> diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
> index 43766e5b680f..b8761a2fc24b 100644
> --- a/fs/xfs/libxfs/xfs_btree.h
> +++ b/fs/xfs/libxfs/xfs_btree.h
> @@ -94,6 +94,12 @@ uint32_t xfs_btree_magic(int crc, xfs_btnum_t btnum);
>
> #define XFS_BTREE_MAXLEVELS 9 /* max of all btrees */
>
> +/*
> + * The btree cursor zone hands out cursors that can handle up to this many
> + * levels. This is the known maximum for all btree types.
> + */
> +#define XFS_BTREE_CUR_ZONE_MAXLEVELS (9)
XFS_BTREE_CUR_CACHE_MAXLEVELS 9
Otherwise looks OK.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2021-10-13 5:40 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 23:32 [PATCHSET v3 00/15] xfs: support dynamic btree cursor height Darrick J. Wong
2021-10-12 23:32 ` [PATCH 01/15] xfs: remove xfs_btree_cur.bc_blocklog Darrick J. Wong
2021-10-13 0:56 ` Dave Chinner
2021-10-12 23:32 ` [PATCH 02/15] xfs: reduce the size of nr_ops for refcount btree cursors Darrick J. Wong
2021-10-13 0:57 ` Dave Chinner
2021-10-12 23:32 ` [PATCH 03/15] xfs: don't track firstrec/firstkey separately in xchk_btree Darrick J. Wong
2021-10-13 1:02 ` Dave Chinner
2021-10-12 23:32 ` [PATCH 04/15] xfs: dynamically allocate btree scrub context structure Darrick J. Wong
2021-10-13 4:57 ` Dave Chinner
2021-10-13 16:29 ` Darrick J. Wong
2021-10-12 23:33 ` [PATCH 05/15] xfs: support dynamic btree cursor heights Darrick J. Wong
2021-10-13 5:31 ` Dave Chinner
2021-10-13 16:52 ` Darrick J. Wong
2021-10-13 21:14 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 06/15] xfs: rearrange xfs_btree_cur fields for better packing Darrick J. Wong
2021-10-13 5:34 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 07/15] xfs: refactor btree cursor allocation function Darrick J. Wong
2021-10-13 5:34 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 08/15] xfs: encode the max btree height in the cursor Darrick J. Wong
2021-10-13 5:38 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 09/15] xfs: dynamically allocate cursors based on maxlevels Darrick J. Wong
2021-10-13 5:40 ` Dave Chinner [this message]
2021-10-13 16:55 ` Darrick J. Wong
2021-10-12 23:33 ` [PATCH 10/15] xfs: compute actual maximum btree height for critical reservation calculation Darrick J. Wong
2021-10-13 5:49 ` Dave Chinner
2021-10-13 17:07 ` Darrick J. Wong
2021-10-13 20:18 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 11/15] xfs: compute the maximum height of the rmap btree when reflink enabled Darrick J. Wong
2021-10-13 7:25 ` Dave Chinner
2021-10-13 17:47 ` Darrick J. Wong
2021-10-12 23:33 ` [PATCH 12/15] xfs: kill XFS_BTREE_MAXLEVELS Darrick J. Wong
2021-10-13 7:25 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 13/15] xfs: widen btree maxlevels computation to handle 64-bit record counts Darrick J. Wong
2021-10-13 7:28 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 14/15] xfs: compute absolute maximum nlevels for each btree type Darrick J. Wong
2021-10-13 7:57 ` Dave Chinner
2021-10-13 21:36 ` Darrick J. Wong
2021-10-13 23:48 ` Dave Chinner
2021-10-12 23:33 ` [PATCH 15/15] xfs: use separate btree cursor cache " Darrick J. Wong
2021-10-13 8:01 ` Dave Chinner
2021-10-13 21:42 ` Darrick J. Wong
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