linux-kernel - Re: [PATCH] ext4: add ext4_sb_bread_nofail() helper function for ext4_free

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Message-ID: <175892300640.128029.15364886889531339470.b4-ty@mit.edu>
Date: Fri, 26 Sep 2025 17:47:41 -0400
From: "Theodore Ts'o" <tytso@....edu>
To: linux-ext4@...r.kernel.org, libaokun@...weicloud.com
Cc: "Theodore Ts'o" <tytso@....edu>, adilger.kernel@...ger.ca, jack@...e.cz,
        linux-kernel@...r.kernel.org, yi.zhang@...wei.com,
        yangerkun@...wei.com, libaokun1@...wei.com
Subject: Re: [PATCH] ext4: add ext4_sb_bread_nofail() helper function for ext4_free_branches()


On Thu, 21 Aug 2025 21:38:57 +0800, libaokun@...weicloud.com wrote:
> The implicit __GFP_NOFAIL flag in ext4_sb_bread() was removed in commit
> 8a83ac54940d ("ext4: call bdev_getblk() from sb_getblk_gfp()"), meaning
> the function can now fail under memory pressure.
> 
> Most callers of ext4_sb_bread() propagate the error to userspace and do not
> remount the filesystem read-only. However, ext4_free_branches() handles
> ext4_sb_bread() failure by remounting the filesystem read-only.
> 
> [...]

Applied, thanks!

[1/1] ext4: add ext4_sb_bread_nofail() helper function for ext4_free_branches()
      commit: d8b90e6387a74bcb1714c8d1e6a782ff709de9a9

Best regards,
-- 
Theodore Ts'o <tytso@....edu>