linux-ext4 - Re: [PATCH 0/2 v2] bdev: Avoid discarding buffers under a filesystem

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Date:   Mon, 7 Sep 2020 10:24:01 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     Jan Kara <jack@...e.cz>, linux-fsdevel@...r.kernel.org
Cc:     linux-ext4@...r.kernel.org, linux-block@...r.kernel.org,
        Christoph Hellwig <hch@...radead.org>,
        yebin <yebin10@...wei.com>, Andreas Dilger <adilger@...ger.ca>
Subject: Re: [PATCH 0/2 v2] bdev: Avoid discarding buffers under a filesystem

On 9/7/20 4:35 AM, Jan Kara wrote:
> Hello!
> 
> On Fri 04-09-20 10:58:50, Jan Kara wrote:
>> this patch set fixes problems when buffer heads are discarded under a
>> live filesystem (which can lead to all sorts of issues like crashes in case
>> of ext4). Patch 1 drops some stale buffer invalidation code, patch 2
>> temporarily gets exclusive access to the block device for the duration of
>> buffer cache handling to avoid interfering with other exclusive bdev user.
>> The patch fixes the problems for me and pass xfstests for ext4.
>>
>> Changes since v1:
>> * Check for exclusive access to the bdev instead of for the presence of
>>   superblock
> 
> Jens, now that Christoph has reviewed the patches (thanks Christoph!), can
> you pick up the patches to your tree please? Thanks!

Yep, I applied them for 5.10. Thanks!

-- 
Jens Axboe