diff options
| author | NeilBrown <neilb@suse.com> | 2017-10-19 03:49:15 +0200 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-11-02 05:32:20 +0100 |
| commit | b03e0ccb5ab9df3efbe51c87843a1ffbecbafa1f (patch) | |
| tree | 4991194aa067e459500bf1c6515b6d716145165c /drivers/md/md-cluster.c | |
| parent | md: allow metadata update while suspending. (diff) | |
| download | linux-b03e0ccb5ab9df3efbe51c87843a1ffbecbafa1f.tar.xz linux-b03e0ccb5ab9df3efbe51c87843a1ffbecbafa1f.zip | |
md: remove special meaning of ->quiesce(.., 2)
The '2' argument means "wake up anything that is waiting".
This is an inelegant part of the design and was added
to help support management of suspend_lo/suspend_hi setting.
Now that suspend_lo/hi is managed in mddev_suspend/resume,
that need is gone.
These is still a couple of places where we call 'quiesce'
with an argument of '2', but they can safely be changed to
call ->quiesce(.., 1); ->quiesce(.., 0) which
achieve the same result at the small cost of pausing IO
briefly.
This removes a small "optimization" from suspend_{hi,lo}_store,
but it isn't clear that optimization served a useful purpose.
The code now is a lot clearer.
Suggested-by: Shaohua Li <shli@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/md-cluster.c')
| -rw-r--r-- | drivers/md/md-cluster.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c index bc81ecc24c96..d0fd1bd8575c 100644 --- a/drivers/md/md-cluster.c +++ b/drivers/md/md-cluster.c @@ -442,10 +442,11 @@ static void __remove_suspend_info(struct md_cluster_info *cinfo, int slot) static void remove_suspend_info(struct mddev *mddev, int slot) { struct md_cluster_info *cinfo = mddev->cluster_info; + mddev->pers->quiesce(mddev, 1); spin_lock_irq(&cinfo->suspend_lock); __remove_suspend_info(cinfo, slot); spin_unlock_irq(&cinfo->suspend_lock); - mddev->pers->quiesce(mddev, 2); + mddev->pers->quiesce(mddev, 0); } @@ -492,13 +493,12 @@ static void process_suspend_info(struct mddev *mddev, s->lo = lo; s->hi = hi; mddev->pers->quiesce(mddev, 1); - mddev->pers->quiesce(mddev, 0); spin_lock_irq(&cinfo->suspend_lock); /* Remove existing entry (if exists) before adding */ __remove_suspend_info(cinfo, slot); list_add(&s->list, &cinfo->suspend_list); spin_unlock_irq(&cinfo->suspend_lock); - mddev->pers->quiesce(mddev, 2); + mddev->pers->quiesce(mddev, 0); } static void process_add_new_disk(struct mddev *mddev, struct cluster_msg *cmsg) |