diff options
| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-11-06 21:03:43 -0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-11-07 14:24:52 -0800 |
| commit | 5277797dc4ed873d067477d84e910b39d113f649 (patch) | |
| tree | 5e2aa87dec2cbcb5bbdfadd697c92e86b0e5aa11 /drivers/target/target_core_xcopy.c | |
| parent | c9e8d128fe316751230ee0c53478740c64f58436 (diff) | |
target: Add percpu refcounting for se_lun access
This patch adds percpu refcounting for se_lun access that allows the
association of an se_lun + se_cmd in transport_lookup_cmd_lun() to
occur without an extra list_head for tracking outstanding I/O during
se_lun shutdown.
This effectively changes se_lun shutdown logic to wait for outstanding
I/O percpu references to complete in transport_lun_remove_cmd() using
se_lun->lun_ref_comp, instead of explicitly draining the per se_lun
command list and waiting for individual se_cmd descriptor processing
to complete.
Cc: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_xcopy.c')
| -rw-r--r-- | drivers/target/target_core_xcopy.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c index 4d22e7d2adca..7a870f6add7b 100644 --- a/drivers/target/target_core_xcopy.c +++ b/drivers/target/target_core_xcopy.c @@ -579,6 +579,7 @@ static int target_xcopy_init_pt_lun( spin_lock_init(&pt_cmd->se_lun->lun_acl_lock); spin_lock_init(&pt_cmd->se_lun->lun_cmd_lock); spin_lock_init(&pt_cmd->se_lun->lun_sep_lock); + init_completion(&pt_cmd->se_lun->lun_ref_comp); pt_cmd->se_dev = se_dev; |