diff options
| author | Brian Behlendorf <[email protected]> | 2012-03-05 15:14:15 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2012-03-07 16:28:00 -0800 |
| commit | 0ece356db51e225c3d4a26dff7cf67c99b6b9c55 (patch) | |
| tree | 8f1e2b35b4c94f8a30dedf65feb5061d903f0043 /module/zfs/sa.c | |
| parent | 2c6d0b1e07b0265f0661ed7851d3aa8d3e75e7a9 (diff) | |
Add sa_spill_rele() interface
Add a SA interface which allows us to release the spill block
from a SA handle without destroying the handle. This is useful
because we can then ensure that a copy of the dirty spill block
is not made at sync time due to the extra hold. Susequent calls
to sa_update() or sa_lookup() with transparently refetch the
spill block dbuf from the ARC hash.
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'module/zfs/sa.c')
| -rw-r--r-- | module/zfs/sa.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/module/zfs/sa.c b/module/zfs/sa.c index bcef7d1fb..32b4c5b08 100644 --- a/module/zfs/sa.c +++ b/module/zfs/sa.c @@ -1334,6 +1334,19 @@ sa_idx_tab_hold(objset_t *os, sa_idx_tab_t *idx_tab) } void +sa_spill_rele(sa_handle_t *hdl) +{ + mutex_enter(&hdl->sa_lock); + if (hdl->sa_spill) { + sa_idx_tab_rele(hdl->sa_os, hdl->sa_spill_tab); + dmu_buf_rele(hdl->sa_spill, NULL); + hdl->sa_spill = NULL; + hdl->sa_spill_tab = NULL; + } + mutex_exit(&hdl->sa_lock); +} + +void sa_handle_destroy(sa_handle_t *hdl) { mutex_enter(&hdl->sa_lock); @@ -1994,6 +2007,7 @@ EXPORT_SYMBOL(sa_handle_get_from_db); EXPORT_SYMBOL(sa_handle_destroy); EXPORT_SYMBOL(sa_buf_hold); EXPORT_SYMBOL(sa_buf_rele); +EXPORT_SYMBOL(sa_spill_rele); EXPORT_SYMBOL(sa_lookup); EXPORT_SYMBOL(sa_update); EXPORT_SYMBOL(sa_remove); |