linux-kernel - Re: [PATCH] fuse: add hang check in request_wait

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Message-ID: <CAJnrk1aR=fPSXPuTBytnOPtE-0zuxfjMmFyug7fjsDa5T1djRA@mail.gmail.com>
Date: Tue, 23 Dec 2025 15:16:02 -0800
From: Joanne Koong <joannelkoong@...il.com>
To: Zhang Tianci <zhangtianci.1997@...edance.com>
Cc: miklos@...redi.hu, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, xieyongji@...edance.com, 
	zhujia.zj@...edance.com, Jiachen Zhang <zhangjiachen.jaycee@...edance.com>
Subject: Re: [PATCH] fuse: add hang check in request_wait_answer()

On Mon, Dec 22, 2025 at 10:22 PM Zhang Tianci
<zhangtianci.1997@...edance.com> wrote:
>
> If the FUSEDaemon fails to respond to FUSE requests
> due to certain reasons (e.g., deadlock), the kernel
> can detect this situation and issue an alert via logging.
> Based on monitoring of such alerts in the kernel logs,
> we can configure hang event alerts for large-scale deployed
> FUSEDaemon clusters.

Hi Zhang,

Does setting a timeout on fuse requests suffice for what you need?
That will detect deadlocks and abort the connection if so.

Thanks,
Joanne
>
> Signed-off-by: Jiachen Zhang <zhangjiachen.jaycee@...edance.com>
> Signed-off-by: Zhang Tianci <zhangtianci.1997@...edance.com>
> ---
>  fs/fuse/dev.c | 46 ++++++++++++++++++++++++++++++++++++++--------
>  1 file changed, 38 insertions(+), 8 deletions(-)
>