diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c')
| -rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c index 8396276..6152144 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c @@ -289,7 +289,18 @@ typedef struct arc_stats { kstat_named_t arcstat_deleted; kstat_named_t arcstat_stolen; kstat_named_t arcstat_recycle_miss; + /* + * Number of buffers that could not be evicted because the hash lock + * was held by another thread. The lock may not necessarily be held + * by something using the same buffer, since hash locks are shared + * by multiple buffers. + */ kstat_named_t arcstat_mutex_miss; + /* + * Number of buffers skipped because they have I/O in progress, are + * indrect prefetch buffers that have not lived long enough, or are + * not from the spa we're trying to evict from. + */ kstat_named_t arcstat_evict_skip; kstat_named_t arcstat_evict_l2_cached; kstat_named_t arcstat_evict_l2_eligible; @@ -3247,6 +3258,10 @@ top: mutex_exit(hash_lock); + /* + * At this point, we have a level 1 cache miss. Try again in + * L2ARC if possible. + */ ASSERT3U(hdr->b_size, ==, size); DTRACE_PROBE4(arc__miss, arc_buf_hdr_t *, hdr, blkptr_t *, bp, uint64_t, size, zbookmark_t *, zb); @@ -3488,8 +3503,8 @@ arc_buf_evict(arc_buf_t *buf) } /* - * Release this buffer from the cache. This must be done - * after a read and prior to modifying the buffer contents. + * Release this buffer from the cache, making it an anonymous buffer. This + * must be done after a read and prior to modifying the buffer contents. * If the buffer has more than one reference, we must make * a new hdr for the buffer. */ |
