linux-kernel - Re: [PATCH 2/2] docs: clarify that dirtytime_expire

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Message-ID: <lzbix55ms6mxta5xf4yvkr66qhxnomqc34diinzqrfluvr2xd7@vnzhyi5r44qe>
Date: Tue, 6 Jan 2026 10:37:09 +0100
From: Jan Kara <jack@...e.cz>
To: Laveesh Bansal <laveeshb@...eeshbansal.com>
Cc: viro@...iv.linux.org.uk, brauner@...nel.org, jack@...e.cz, 
	tytso@....edu, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] docs: clarify that dirtytime_expire_seconds=0
 disables writeback

On Fri 02-01-26 20:16:57, Laveesh Bansal wrote:
> Document that setting vm.dirtytime_expire_seconds to zero disables
> periodic dirtytime writeback, matching the behavior of the related
> dirty_writeback_centisecs sysctl which already documents this.
> 
> Signed-off-by: Laveesh Bansal <laveeshb@...eeshbansal.com>

Looks good. Feel free to add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

> ---
>  Documentation/admin-guide/sysctl/vm.rst | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/admin-guide/sysctl/vm.rst b/Documentation/admin-guide/sysctl/vm.rst
> index 4d71211fdad8..e2fdbc521033 100644
> --- a/Documentation/admin-guide/sysctl/vm.rst
> +++ b/Documentation/admin-guide/sysctl/vm.rst
> @@ -231,6 +231,8 @@ eventually gets pushed out to disk.  This tunable is used to define when dirty
>  inode is old enough to be eligible for writeback by the kernel flusher threads.
>  And, it is also used as the interval to wakeup dirtytime_writeback thread.
>  
> +Setting this to zero disables periodic dirtytime writeback.
> +
>  
>  dirty_writeback_centisecs
>  =========================
> -- 
> 2.43.0
> 
-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR