linux-kernel - Re: [f2fs-dev] [PATCH 1/2 v4] f2fs: support large folio for immutable non-compressed case

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Message-ID: <97ecd003-e3bf-4112-80e5-d2db31484471@kernel.org>
Date: Tue, 2 Dec 2025 10:07:51 -0800
From: Chao Yu <chao@...nel.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: chao@...nel.org, linux-kernel@...r.kernel.org,
 linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH 1/2 v4] f2fs: support large folio for immutable
 non-compressed case

On 2025/12/2 10:38, Jaegeuk Kim wrote:
> This patch enables large folio for limited case where we can get the high-order
> memory allocation. It supports the encrypted and fsverity files, which are
> essential for Android environment.
> 
> How to test:
> - dd if=/dev/zero of=/mnt/test/test bs=1G count=4
> - f2fs_io setflags immutable /mnt/test/test
> - echo 3 > /proc/sys/vm/drop_caches
>   : to reload inode with large folio
> - f2fs_io read 32 0 1024 mmap 0 0 /mnt/test/test
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,