Re: [PATCH v[n] 2/2] fuse: Introduce sysfs API for resend pending requests

[Gao Xiang <hsiangkao@linux.alibaba.com>]

On 2023/10/31 22:40, 赵晨 wrote:
> From: Peng Tao <tao.peng@linux.alibaba.com>
> 
> When a FUSE daemon panics and fails over, we want to reuse the existing
> FUSE connection and avoid affecting applications as little as possible.
> During FUSE daemon failover, the FUSE processing queue requests are
> waiting forreplies from user space daemon that never come back and
> applications would stuck forever.
> 
> Besides flushing the processing queue requests like being done in
> fuse_flush_pq(), we can also resend these requests to user space daemon
> so that they can be processed properly again. Such strategy can only be
> done for idempotent requests or if the user space daemon takes good care
> to record and avoid processing duplicated non-idempotent requests,
> otherwise there can be consistency issues. We trust users to know what
> they are doing by calling writing to this interface.
> 
> Signed-off-by: Peng Tao <tao.peng@linux.alibaba.com>
> Reviewed-by: Liu Bo <bo.liu@linux.alibaba.com>
> Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
> Reviewed-by: Jeffle Xu <jefflexu@linux.alibaba.com>
> Acked-by: Gao Xiang <hsiangkao@linux.alibaba.com>

Sorry, please don't add my internal ack for downstream kernels to
the community mailing lists.

Thanks,
Gao Xiang