linux-ext4 - Re: [RFC PATCH] ext2: drop cached block when detecting corruption

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Message-ID: <398a6fd8-37ee-c323-b606-c8679067e540@mykernel.net>
Date:   Thu, 4 Jun 2020 14:26:49 +0800
From:   cgxu <cgxu519@...ernel.net>
To:     jack@...e.com
Cc:     linux-ext4@...r.kernel.org
Subject: Re: [RFC PATCH] ext2: drop cached block when detecting corruption

On 6/3/20 5:44 PM, Chengguang Xu wrote:
> Currently ext2 uses mdcache for deduplication of extended
> attribution blocks. However, there is lack of handling for
> corrupted blocks, so newly created EAs may still links to
> corrupted blocks. This patch tries to drop cached block
> when detecting corruption to mitigate the effect.

ext2_xattr_cmp() will carefully check every entry in the block,
so there is no chance to link to corrupted block, maybe we can
improve the speed of cache related operations by dropping
corrupted blocks.


Thanks,
cgxu