[dm-devel] [PATCH 0/3] Add a new func to handle with clearing up for stoping dm-raid.
majianpeng
majianpeng at gmail.com
Mon Nov 19 00:36:53 UTC 2012
>On Thu, 15 Nov 2012 16:46:54 +0800 majianpeng <majianpeng at gmail.com> wrote:
>
>> Because dm-raid call md_stop to clear up,but md_stop can't clear up completely.
>> So add a new func to do.
>>
>> Jianpeng Ma (3):
>> md:Add a func 'dm_md_stop' for dm-raid to clear up md resource.
>> dm: When stoping dm-raid, it call dm_md_stop rather than md_stop to
>> do clear-up work.
>> md: Remove EXPORT_SYMBOL_GPL(md_stop).
>>
>> drivers/md/dm-raid.c | 4 ++--
>> drivers/md/md.c | 10 +++++++++-
>> drivers/md/md.h | 1 +
>> 3 files changed, 12 insertions(+), 3 deletions(-)
>>
>
>You don't really need 3 patches for this one little change.
>
>I've applied the following.
>
>Thanks for the report.
>
>NeilBrown
>
>From 4ba69e1a88480249918ed2df8be0896be6ba7952 Mon Sep 17 00:00:00 2001
>From: NeilBrown <neilb at suse.de>
>Date: Mon, 19 Nov 2012 10:47:48 +1100
>Subject: [PATCH] md: make sure everything is freed when dm-raid stops an
> array.
>
>md_stop() would stop an array, but not free various attached
>data structures.
>For internal arrays, these are freed later in do_md_stop() or
>mddev_put(), but they don't apply for dm-raid arrays.
>So get md_stop() to free them, and only all it from dm-raid.
>For internal arrays we now call __md_stop.
>
>Reported-by: majianpeng <majianpeng at gmail.com>
>Signed-off-by: NeilBrown <neilb at suse.de>
>
>diff --git a/drivers/md/md.c b/drivers/md/md.c
>index 98e1484..71df3c2 100644
>--- a/drivers/md/md.c
>+++ b/drivers/md/md.c
>@@ -5294,7 +5294,7 @@ void md_stop_writes(struct mddev *mddev)
> }
> EXPORT_SYMBOL_GPL(md_stop_writes);
>
>-void md_stop(struct mddev *mddev)
>+void __md_stop(struct mddev *mddev)
> {
> mddev->ready = 0;
> mddev->pers->stop(mddev);
>@@ -5304,6 +5304,18 @@ void md_stop(struct mddev *mddev)
> mddev->pers = NULL;
> clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
> }
>+
>+void md_stop(struct mddev *mddev)
>+{
>+ /* stop the array and free an attached data structures.
>+ * This is called from dm-raid
>+ */
>+ __md_stop(mddev);
>+ bitmap_destroy(mddev);
>+ if (mddev->bio_set)
>+ bioset_free(mddev->bio_set);
>+}
>+
> EXPORT_SYMBOL_GPL(md_stop);
>
> static int md_set_readonly(struct mddev *mddev, struct block_device *bdev)
>@@ -5364,7 +5376,7 @@ static int do_md_stop(struct mddev * mddev, int mode,
> set_disk_ro(disk, 0);
>
> __md_stop_writes(mddev);
>- md_stop(mddev);
>+ __md_stop(mddev);
> mddev->queue->merge_bvec_fn = NULL;
> mddev->queue->backing_dev_info.congested_fn = NULL;
>
>
Thanks!
Jianpeng
More information about the dm-devel
mailing list