From: Matthew Wilcox <willy@infradead.org>
To: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Theodore Ts'o <tytso@mit.edu>,
Christoph Hellwig <hch@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
caiqingfu <baicaiaichibaicai@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-ext4@vger.kernel.org, linux-block@vger.kernel.org,
linux-fsdevel@vger.kernel.org
Subject: Re: [bugzilla:219548] the kernel crashes when storing an EXT4 file system in a ZRAM device
Date: Thu, 12 Dec 2024 04:14:29 +0000 [thread overview]
Message-ID: <Z1pjJWkheibiaWuV@casper.infradead.org> (raw)
In-Reply-To: <20241212035826.GH2091455@google.com>
On Thu, Dec 12, 2024 at 12:58:26PM +0900, Sergey Senozhatsky wrote:
> Hi,
>
> We've got two reports [1] [2] (could be the same person) which
> suggest that ext4 may change page content while the page is under
> write(). The particular problem here the case when ext4 is on
> the zram device. zram compresses every page written to it, so if
> the page content can be modified concurrently with zram's compression
> then we can't really use zram with ext4.
Do you set BLK_FEAT_STABLE_WRITES on zram?
next prev parent reply other threads:[~2024-12-12 4:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-12 3:58 [bugzilla:219548] the kernel crashes when storing an EXT4 file system in a ZRAM device Sergey Senozhatsky
2024-12-12 4:14 ` Matthew Wilcox [this message]
2024-12-12 4:35 ` Sergey Senozhatsky
2024-12-12 4:49 ` Christoph Hellwig
2024-12-12 5:37 ` Theodore Ts'o
2024-12-12 6:30 ` Sergey Senozhatsky
2024-12-12 7:35 ` Christoph Hellwig
2024-12-12 14:04 ` Theodore Ts'o
2024-12-12 14:12 ` Theodore Ts'o
2024-12-12 8:37 ` Sergey Senozhatsky
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