diff options
| author | Chunwei Chen <[email protected]> | 2016-12-21 10:47:15 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2016-12-21 10:47:15 -0800 |
| commit | da8f51e16aa4e1832f8c1a9ddc3082e4469b4485 (patch) | |
| tree | afa7bb50215497f1bddfcfcfc71b95cb97ef428f /include | |
| parent | 5f1346c29997dd4e02acf4c19c875d5484f33b1e (diff) | |
Use a dedicated taskq for vdev_file
The introduction of parallel zvol prefetch causes deadlock when using
vdev_file.
spa_async->(spa_namespace_lock)->txg_wait_synced->(wait for txg_sync)
txg_sync->zio_wait->(wait for vdev_file_io_fsync on system_taskq)
zvol_prefetch_minors_impl (on system_taskq)->spa_open_common->(wait for spa_namespace_lock)
We fix this by using dedicated taskq for vdev_file. This same change
was originally made in commit bc25c93 but reverted in commit aa9af22
when dynamic taskqs were added.
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Chunwei Chen <[email protected]>
Closes #5506
Closes #5495
Diffstat (limited to 'include')
| -rw-r--r-- | include/sys/vdev_file.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/sys/vdev_file.h b/include/sys/vdev_file.h index aebcf55cf..9a398c583 100644 --- a/include/sys/vdev_file.h +++ b/include/sys/vdev_file.h @@ -37,6 +37,9 @@ typedef struct vdev_file { vnode_t *vf_vnode; } vdev_file_t; +extern void vdev_file_init(void); +extern void vdev_file_fini(void); + #ifdef __cplusplus } #endif |