diff options
| author | Christoph Hellwig <hch@lst.de> | 2024-02-22 23:41:02 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2024-02-22 23:41:02 +0300 |
| commit | 24f755e4854e0fddb78d18f610bf1b5cb61db520 (patch) | |
| tree | 534c0cd058d7b487bc33ea3e307d8488335de036 /fs/xfs/xfs_buf.c | |
| parent | 6a701eb8fbbb5f500684947883fd77ed0475fa82 (diff) | |
| download | linux-24f755e4854e0fddb78d18f610bf1b5cb61db520.tar.xz | |
xfs: split xfs_buf_rele for cached vs uncached buffers
xfs_buf_rele is a bit confusing because it mixes up handling of normal
cached and the special uncached buffers without much explanation.
Split the handling into two different helpers, and use a clearly named
helper that checks the hash key to distinguish the two cases instead
of checking the pag pointer.
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>
Diffstat (limited to 'fs/xfs/xfs_buf.c')
| -rw-r--r-- | fs/xfs/xfs_buf.c | 46 |
1 files changed, 31 insertions, 15 deletions
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c index fb80cae0b2e5..1e85780411d5 100644 --- a/fs/xfs/xfs_buf.c +++ b/fs/xfs/xfs_buf.c @@ -60,6 +60,11 @@ xfs_buf_submit( return __xfs_buf_submit(bp, !(bp->b_flags & XBF_ASYNC)); } +static inline bool xfs_buf_is_uncached(struct xfs_buf *bp) +{ + return bp->b_rhash_key == XFS_BUF_DADDR_NULL; +} + static inline int xfs_buf_is_vmapped( struct xfs_buf *bp) @@ -996,12 +1001,19 @@ xfs_buf_hold( atomic_inc(&bp->b_hold); } -/* - * Release a hold on the specified buffer. If the hold count is 1, the buffer is - * placed on LRU or freed (depending on b_lru_ref). - */ -void -xfs_buf_rele( +static void +xfs_buf_rele_uncached( + struct xfs_buf *bp) +{ + ASSERT(list_empty(&bp->b_lru)); + if (atomic_dec_and_test(&bp->b_hold)) { + xfs_buf_ioacct_dec(bp); + xfs_buf_free(bp); + } +} + +static void +xfs_buf_rele_cached( struct xfs_buf *bp) { struct xfs_perag *pag = bp->b_pag; @@ -1010,15 +1022,6 @@ xfs_buf_rele( trace_xfs_buf_rele(bp, _RET_IP_); - if (!pag) { - ASSERT(list_empty(&bp->b_lru)); - if (atomic_dec_and_test(&bp->b_hold)) { - xfs_buf_ioacct_dec(bp); - xfs_buf_free(bp); - } - return; - } - ASSERT(atomic_read(&bp->b_hold) > 0); /* @@ -1086,6 +1089,19 @@ out_unlock: xfs_buf_free(bp); } +/* + * Release a hold on the specified buffer. + */ +void +xfs_buf_rele( + struct xfs_buf *bp) +{ + trace_xfs_buf_rele(bp, _RET_IP_); + if (xfs_buf_is_uncached(bp)) + xfs_buf_rele_uncached(bp); + else + xfs_buf_rele_cached(bp); +} /* * Lock a buffer object, if it is not already locked. |