Linux EXT4 FS development
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From: "Zhou, Yun" <yun.zhou@windriver.com>
To: tytso@mit.edu, adilger.kernel@dilger.ca,
	libaokun@linux.alibaba.com, jack@suse.cz, ojaswin@linux.ibm.com,
	ritesh.list@gmail.com, yi.zhang@huawei.com
Cc: linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] ext4: set EXT4_STATE_NO_EXPAND in ext4_evict_inode
Date: Tue, 7 Jul 2026 14:57:00 +0800	[thread overview]
Message-ID: <cabf6e5e-557e-40dd-8ce2-6a80ebad38cb@windriver.com> (raw)
In-Reply-To: <20260623061903.2148767-2-yun.zhou@windriver.com>

Friendly ping

On 6/23/26 14:19, Yun Zhou wrote:
> An inode being evicted will never need its extra isize expanded.  Set
> EXT4_STATE_NO_EXPAND before ext4_mark_inode_dirty() in ext4_evict_inode()
> to make this explicit and prevent any unnecessary work in
> ext4_try_to_expand_extra_isize().
> 
> This also provides defense-in-depth for the s_writepages_rwsem deadlock
> during mount-time orphan cleanup, ensuring the expand path is blocked
> for inodes under eviction regardless of how they are reached.
> 
> Signed-off-by: Yun Zhou <yun.zhou@windriver.com>
> Reviewed-by: Jan Kara <jack@suse.cz>
> ---
>   fs/ext4/inode.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
> index a5409324d965..0d131371ad3d 100644
> --- a/fs/ext4/inode.c
> +++ b/fs/ext4/inode.c
> @@ -264,6 +264,7 @@ void ext4_evict_inode(struct inode *inode)
>   	if (ext4_inode_is_fast_symlink(inode))
>   		memset(EXT4_I(inode)->i_data, 0, sizeof(EXT4_I(inode)->i_data));
>   	inode->i_size = 0;
> +	ext4_set_inode_state(inode, EXT4_STATE_NO_EXPAND);
>   	err = ext4_mark_inode_dirty(handle, inode);
>   	if (err) {
>   		ext4_warning(inode->i_sb,


      reply	other threads:[~2026-07-07  6:57 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-23  6:19 [PATCH 1/2] ext4: skip extra isize expansion during mount to prevent deadlock Yun Zhou
2026-06-23  6:19 ` [PATCH 2/2] ext4: set EXT4_STATE_NO_EXPAND in ext4_evict_inode Yun Zhou
2026-07-07  6:57   ` Zhou, Yun [this message]

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