korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-16 15:34:48 +08:00
Code Issues Packages Projects Releases Wiki Activity

md: remove redundant md_wakeup_thread()

Browse Source 
On the one hand, mddev_unlock() will call md_wakeup_thread()
unconditionally; on the other hand, md_check_recovery() can't make
progress if 'reconfig_mutex' can't be grabbed. Hence, it really doesn't
make sense to wake up daemon thread while 'reconfig_mutex' is still
grabbed.

Remove all the md_wakup_thread() for 'mddev->thread' while
'reconfig_mtuex' is still grabbed.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231228125553.2697765-3-yukuai1@huaweicloud.com
This commit is contained in:
Yu Kuai 2023-12-28 20:55:52 +08:00 committed by Song Liu
parent 61c90765e1
commit faeaf210a5
1 changed files with 2 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/md/md.c
View File

@ -2929,7 +2929,6 @@ static int add_bound_rdev(struct md_rdev *rdev)
set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_new_event();
md_wakeup_thread(mddev->thread);
return 0;
}
@ -3044,10 +3043,8 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len)
if (err == 0) {
md_kick_rdev_from_array(rdev);
if (mddev->pers) {
if (mddev->pers)
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
md_wakeup_thread(mddev->thread);
}
md_new_event();
}
}
@ -3077,7 +3074,6 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len)
clear_bit(BlockedBadBlocks, &rdev->flags);
wake_up(&rdev->blocked_wait);
set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery);
md_wakeup_thread(rdev->mddev->thread);
err = 0;
} else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) {
@ -3115,7 +3111,6 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len)
!test_bit(Replacement, &rdev->flags))
set_bit(WantReplacement, &rdev->flags);
set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery);
md_wakeup_thread(rdev->mddev->thread);
err = 0;
} else if (cmd_match(buf, "-want_replacement")) {
/* Clearing 'want_replacement' is always allowed.
@ -3245,7 +3240,6 @@ slot_store(struct md_rdev *rdev, const char *buf, size_t len)
if (rdev->raid_disk >= 0)
return -EBUSY;
set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery);
md_wakeup_thread(rdev->mddev->thread);
} else if (rdev->mddev->pers) {
/* Activating a spare .. or possibly reactivating
* if we ever get bitmaps working here.
@ -6186,7 +6180,6 @@ int do_md_run(struct mddev *mddev)
/* run start up tasks that require md_thread */
md_start(mddev);
md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
set_capacity_and_notify(mddev->gendisk, mddev->array_sectors);
@ -6207,7 +6200,6 @@ int md_start(struct mddev *mddev)
if (mddev->pers->start) {
set_bit(MD_RECOVERY_WAIT, &mddev->recovery);
md_wakeup_thread(mddev->thread);
ret = mddev->pers->start(mddev);
clear_bit(MD_RECOVERY_WAIT, &mddev->recovery);
md_wakeup_thread(mddev->sync_thread);
@ -6252,7 +6244,6 @@ static int restart_array(struct mddev *mddev)
pr_debug("md: %s switched to read-write mode.\n", mdname(mddev));
/* Kick recovery or resync if necessary */
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread);
sysfs_notify_dirent_safe(mddev->sysfs_state);
return 0;
@ -6396,7 +6387,6 @@ static int md_set_readonly(struct mddev *mddev, struct block_device *bdev)
if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) {
did_freeze = 1;
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
md_wakeup_thread(mddev->thread);
}
stop_sync_thread(mddev, false, false);
@ -6428,7 +6418,6 @@ out:
if ((mddev->pers && !err) || did_freeze) {
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
sysfs_notify_dirent_safe(mddev->sysfs_state);
}
@ -6450,7 +6439,6 @@ static int do_md_stop(struct mddev *mddev, int mode,
if (!test_bit(MD_RECOVERY_FROZEN, &mddev->recovery)) {
did_freeze = 1;
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
md_wakeup_thread(mddev->thread);
}
stop_sync_thread(mddev, true, false);
@ -6464,7 +6452,6 @@ static int do_md_stop(struct mddev *mddev, int mode,
if (did_freeze) {
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
}
return -EBUSY;
}
@ -7005,9 +6992,7 @@ kick_rdev:
md_kick_rdev_from_array(rdev);
set_bit(MD_SB_CHANGE_DEVS, &mddev->sb_flags);
if (mddev->thread)
md_wakeup_thread(mddev->thread);
else
if (!mddev->thread)
md_update_sb(mddev, 1);
md_new_event();
@ -7089,7 +7074,6 @@ static int hot_add_disk(struct mddev *mddev, dev_t dev)
* array immediately.
*/
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
md_new_event();
return 0;