linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: set highest IO priority for checkpoint thread

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Message-ID: <CACOAw_zmqS8UrpsYeMEEvyc_Xe9edx4ptWOtQBz3UufZM+iNag@mail.gmail.com>
Date: Tue, 4 Mar 2025 10:23:36 -0800
From: Daeho Jeong <daeho43@...il.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: set highest IO priority for checkpoint thread

On Mon, Mar 3, 2025 at 2:19 PM Jaegeuk Kim via Linux-f2fs-devel
<linux-f2fs-devel@...ts.sourceforge.net> wrote:
>
> The checkpoint is the top priority thread which can stop all the filesystem
> operations. Let's make it RT priority.
>
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>  fs/f2fs/checkpoint.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> index bd890738b94d..8dbb815a35c0 100644
> --- a/fs/f2fs/checkpoint.c
> +++ b/fs/f2fs/checkpoint.c
> @@ -21,7 +21,7 @@
>  #include "iostat.h"
>  #include <trace/events/f2fs.h>
>
> -#define DEFAULT_CHECKPOINT_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3))
> +#define DEFAULT_CHECKPOINT_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_RT, 3))
>
>  static struct kmem_cache *ino_entry_slab;
>  struct kmem_cache *f2fs_inode_entry_slab;
> --
> 2.48.1.711.g2feabab25a-goog
>

Reviewed-by: Daeho Jeong <daehojeong@...gle.com>

>
>
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