diff options
| author | Justin T. Gibbs <[email protected]> | 2015-04-02 14:44:32 +1100 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2015-04-28 16:25:34 -0700 |
| commit | 0c66c32d1d8b64a261cceb5f50a9e86777c5d0b2 (patch) | |
| tree | 82f5630e8a4e77931e9992db3a7fac1964414716 /module/zfs/dsl_userhold.c | |
| parent | d683ddbb7272a179da3918cc4f922d92a2195ba2 (diff) | |
Illumos 5056 - ZFS deadlock on db_mtx and dn_holds
5056 ZFS deadlock on db_mtx and dn_holds
Author: Justin Gibbs <[email protected]>
Reviewed by: Will Andrews <[email protected]>
Reviewed by: Matt Ahrens <[email protected]>
Reviewed by: George Wilson <[email protected]>
Approved by: Dan McDonald <[email protected]>
References:
https://www.illumos.org/issues/5056
https://github.com/illumos/illumos-gate/commit/bc9014e
Porting Notes:
sa_handle_get_from_db():
- the original patch includes an otherwise unmentioned fix for a
possible usage of an uninitialised variable
dmu_objset_open_impl():
- Under Illumos list_link_init() is the same as filling a list_node_t
with NULLs, so they don't notice if they miss doing list_link_init()
on a zero'd containing structure (e.g. allocated with kmem_zalloc as
here). Under Linux, not so much: an uninitialised list_node_t goes
"Boom!" some time later when it's used or destroyed.
dmu_objset_evict_dbufs():
- reduce stack usage using kmem_alloc()
Ported-by: Chris Dunlop <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Diffstat (limited to 'module/zfs/dsl_userhold.c')
| -rw-r--r-- | module/zfs/dsl_userhold.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/module/zfs/dsl_userhold.c b/module/zfs/dsl_userhold.c index e2318d03b..4007d4c5e 100644 --- a/module/zfs/dsl_userhold.c +++ b/module/zfs/dsl_userhold.c @@ -354,7 +354,7 @@ dsl_dataset_user_release_check_one(dsl_dataset_user_release_arg_t *ddura, objset_t *mos; int numholds; - if (!dsl_dataset_is_snapshot(ds)) + if (!ds->ds_is_snapshot) return (SET_ERROR(EINVAL)); if (nvlist_empty(holds)) |