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| author | Dave Chinner | 2010-12-03 14:02:40 +0100 |
|---|---|---|
| committer | Dave Chinner | 2010-12-03 14:02:40 +0100 |
| commit | c8a09ff8ca2235bccdaea8a52fbd5349646a8ba4 (patch) | |
| tree | a06b4fa59672fd6fa9dd884e1e0bc746adc011b6 | |
| parent | xfs: convert l_tail_lsn to an atomic variable. (diff) | |
| download | kernel-qcow2-linux-c8a09ff8ca2235bccdaea8a52fbd5349646a8ba4.tar.gz kernel-qcow2-linux-c8a09ff8ca2235bccdaea8a52fbd5349646a8ba4.tar.xz kernel-qcow2-linux-c8a09ff8ca2235bccdaea8a52fbd5349646a8ba4.zip | |
xfs: convert log grant heads to atomic variables
Convert the log grant heads to atomic64_t types in preparation for
converting the accounting algorithms to atomic operations. his patch
just converts the variables; the algorithmic changes are in a
separate patch for clarity.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | fs/xfs/xfs_log.c | 8 | ||||
| -rw-r--r-- | fs/xfs/xfs_log_priv.h | 12 |
2 files changed, 10 insertions, 10 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index d118bf804480..a1d7d12fc51f 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -47,7 +47,7 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, xfs_buftarg_t *log_target, xfs_daddr_t blk_offset, int num_bblks); -STATIC int xlog_space_left(struct log *log, int64_t *head); +STATIC int xlog_space_left(struct log *log, atomic64_t *head); STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog); STATIC void xlog_dealloc_log(xlog_t *log); @@ -100,7 +100,7 @@ STATIC int xlog_iclogs_empty(xlog_t *log); static void xlog_grant_sub_space( struct log *log, - int64_t *head, + atomic64_t *head, int bytes) { int cycle, space; @@ -119,7 +119,7 @@ xlog_grant_sub_space( static void xlog_grant_add_space( struct log *log, - int64_t *head, + atomic64_t *head, int bytes) { int tmp; @@ -816,7 +816,7 @@ xlog_assign_tail_lsn( STATIC int xlog_space_left( struct log *log, - int64_t *head) + atomic64_t *head) { int free_bytes; int tail_bytes; diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index d34af1c21ed2..7619d6a02388 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -514,8 +514,8 @@ typedef struct log { spinlock_t l_grant_lock ____cacheline_aligned_in_smp; struct list_head l_reserveq; struct list_head l_writeq; - int64_t l_grant_reserve_head; - int64_t l_grant_write_head; + atomic64_t l_grant_reserve_head; + atomic64_t l_grant_write_head; /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and @@ -596,18 +596,18 @@ xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) * will always get consistent component values to work from. */ static inline void -xlog_crack_grant_head(int64_t *head, int *cycle, int *space) +xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) { - int64_t val = *head; + int64_t val = atomic64_read(head); *cycle = val >> 32; *space = val & 0xffffffff; } static inline void -xlog_assign_grant_head(int64_t *head, int cycle, int space) +xlog_assign_grant_head(atomic64_t *head, int cycle, int space) { - *head = ((int64_t)cycle << 32) | space; + atomic64_set(head, ((int64_t)cycle << 32) | space); } /* |