From: Coly Li <colyli@suse.de>
To: axboe@kernel.dk
Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org,
Lin Feng <linf@wangsu.com>, Coly Li <colyli@suse.de>
Subject: [PATCH 4/8] bcache: move calc_cached_dev_sectors to proper place on backing device detach
Date: Wed, 20 Oct 2021 22:38:08 +0800 [thread overview]
Message-ID: <20211020143812.6403-5-colyli@suse.de> (raw)
In-Reply-To: <20211020143812.6403-1-colyli@suse.de>
From: Lin Feng <linf@wangsu.com>
Calculation of cache_set's cached sectors is done by travelling
cached_devs list as shown below:
static void calc_cached_dev_sectors(struct cache_set *c)
{
...
list_for_each_entry(dc, &c->cached_devs, list)
sectors += bdev_sectors(dc->bdev);
c->cached_dev_sectors = sectors;
}
But cached_dev won't be unlinked from c->cached_devs list until we call
following list_move(&dc->list, &uncached_devices),
so previous fix in 'commit 46010141da6677b81cc77f9b47f8ac62bd1cbfd3
("bcache: recal cached_dev_sectors on detach")' is wrong, now we move
it to its right place.
Signed-off-by: Lin Feng <linf@wangsu.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
drivers/md/bcache/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 6bc5ee42a059..05877177b768 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -1153,9 +1153,9 @@ static void cached_dev_detach_finish(struct work_struct *w)
mutex_lock(&bch_register_lock);
- calc_cached_dev_sectors(dc->disk.c);
bcache_device_detach(&dc->disk);
list_move(&dc->list, &uncached_devices);
+ calc_cached_dev_sectors(dc->disk.c);
clear_bit(BCACHE_DEV_DETACHING, &dc->disk.flags);
clear_bit(BCACHE_DEV_UNLINK_DONE, &dc->disk.flags);
--
2.31.1
next prev parent reply other threads:[~2021-10-20 14:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-20 14:38 [PATCH 0/8] bcache patches for Linux v5.16 (first wave) Coly Li
2021-10-20 14:38 ` [PATCH 1/8] md: bcache: Fix spelling of 'acquire' Coly Li
2021-10-20 14:38 ` [PATCH 2/8] bcache: reserve never used bits from bkey.high Coly Li
2021-10-20 14:38 ` [PATCH 3/8] bcache: fix error info in register_bcache() Coly Li
2021-10-20 14:38 ` Coly Li [this message]
2021-10-20 14:38 ` [PATCH 5/8] bcache: remove the cache_dev_name field from struct cache Coly Li
2021-10-20 14:38 ` [PATCH 6/8] bcache: remove the backing_dev_name field from struct cached_dev Coly Li
2021-10-20 14:38 ` [PATCH 7/8] bcache: use bvec_kmap_local in bch_data_verify Coly Li
2021-10-20 14:38 ` [PATCH 8/8] bcache: remove bch_crc64_update Coly Li
2021-10-20 14:41 ` [PATCH 0/8] bcache patches for Linux v5.16 (first wave) Jens Axboe
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