Mercurial > illumos > illumos-gate
diff usr/src/uts/common/fs/zfs/dsl_dataset.c @ 12450:c77e20e4e046
6938089 dedup-induced latency causes FC initiator logouts/FC port resets
| author | George Wilson <George.Wilson@Sun.COM> |
|---|---|
| date | Wed, 19 May 2010 22:59:13 -0700 |
| parents | 7cf402a7f374 |
| children | 54258108784b |
line wrap: on
line diff
--- a/usr/src/uts/common/fs/zfs/dsl_dataset.c Wed May 19 22:33:49 2010 -0700 +++ b/usr/src/uts/common/fs/zfs/dsl_dataset.c Wed May 19 22:59:13 2010 -0700 @@ -40,6 +40,11 @@ #include <sys/zvol.h> #include <sys/dsl_scan.h> +/* + * Enable/disable prefetching of dedup-ed blocks which are going to be freed. + */ +int zfs_dedup_prefetch = 1; + static char *dsl_reaper = "the grim reaper"; static dsl_checkfunc_t dsl_dataset_destroy_begin_check; @@ -234,9 +239,16 @@ } boolean_t -dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth) +dsl_dataset_block_freeable(dsl_dataset_t *ds, const blkptr_t *bp, + uint64_t blk_birth) { - return (blk_birth > dsl_dataset_prev_snap_txg(ds)); + if (blk_birth <= dsl_dataset_prev_snap_txg(ds)) + return (B_FALSE); + + if (zfs_dedup_prefetch && bp && BP_GET_DEDUP(bp)) + ddt_prefetch(dsl_dataset_get_spa(ds), bp); + + return (B_TRUE); } /* ARGSUSED */