From: David Sterba <dsterba@suse.cz>
To: Josef Bacik <josef@toxicpanda.com>
Cc: linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH 4/4] btrfs: do not create raid sysfs entries under any locks
Date: Tue, 8 Sep 2020 14:40:03 +0200 [thread overview]
Message-ID: <20200908124003.GE28318@twin.jikos.cz> (raw)
In-Reply-To: <2f140cd79a9738e72fc6da6ef4ba3635962dbf9c.1598996236.git.josef@toxicpanda.com>
On Tue, Sep 01, 2020 at 05:40:38PM -0400, Josef Bacik wrote:
> }
>
> list_for_each_entry(space_info, &info->space_info, list) {
> + int i;
> +
> + for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
> + if (list_empty(&space_info->block_groups[i]))
> + continue;
> + cache = list_first_entry(&space_info->block_groups[i],
> + struct btrfs_block_group,
> + list);
> + btrfs_sysfs_add_block_group_type(cache);
> + }
> +
I had the previous version of the patch pass fstests, with no lockdep
warnings and then realized it's not the v2 that depends on the 3rd patch
removing RCU from this list traversal.
btrfs_sysfs_add_block_group_type does not seem to be conflicting RCU in
this loop so now I'm undecided if v1 is ok or if we really need v2, sice
the patch 3 removing RCU seems suspicious.
next prev parent reply other threads:[~2020-09-08 19:16 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-01 21:40 [PATCH 0/4][v2] Lockdep fixes Josef Bacik
2020-09-01 21:40 ` [PATCH 1/4] btrfs: fix lockdep splat in add_missing_dev Josef Bacik
2020-09-02 6:23 ` Anand Jain
2020-09-03 11:17 ` David Sterba
2020-09-01 21:40 ` [PATCH 2/4] btrfs: init sysfs for devices outside of the chunk_mutex Josef Bacik
2020-09-02 6:21 ` Anand Jain
2020-09-02 17:45 ` David Sterba
2020-09-03 11:41 ` Anand Jain
2020-09-03 11:42 ` Anand Jain
2020-09-03 11:18 ` David Sterba
2020-09-01 21:40 ` [PATCH 3/4] btrfs: kill the rcu protection for fs_info->space_info Josef Bacik
2020-09-02 8:04 ` Nikolay Borisov
2020-09-02 10:32 ` David Sterba
2020-09-01 21:40 ` [PATCH 4/4] btrfs: do not create raid sysfs entries under any locks Josef Bacik
2020-09-08 12:40 ` David Sterba [this message]
2020-09-08 12:52 ` Josef Bacik
2020-09-04 14:20 ` [PATCH 0/4][v2] Lockdep fixes David Sterba
2020-09-07 13:05 ` David Sterba
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