Re: [PATCH 2/2] io_uring: use TWA_SIGNAL for task_work if the task isn't running

From: Jens Axboe <axboe@kernel.dk>
To: Sasha Levin <sashal@kernel.org>, io-uring@vger.kernel.org
Cc: peterz@infradead.org, stable@vger.kernel.org
Subject: Re: [PATCH 2/2] io_uring: use TWA_SIGNAL for task_work if the task isn't running
Date: Wed, 19 Aug 2020 17:59:11 -0600	[thread overview]
Message-ID: <073069ae-6de9-811d-b22e-c4d992ba3110@kernel.dk> (raw)
In-Reply-To: <20200819235703.AA48120B1F@mail.kernel.org>

On 8/19/20 4:57 PM, Sasha Levin wrote:
> Hi
> 
> [This is an automated email]
> 
> This commit has been processed because it contains a -stable tag.
> The stable tag indicates that it's relevant for the following trees: 5.7+
> 
> The bot has tested the following trees: v5.8.1, v5.7.15.
> 
> v5.8.1: Failed to apply! Possible dependencies:
>     3fa5e0f33128 ("io_uring: optimise io_req_find_next() fast check")
>     4503b7676a2e ("io_uring: catch -EIO from buffered issue request failure")
>     7c86ffeeed30 ("io_uring: deduplicate freeing linked timeouts")
>     9b0d911acce0 ("io_uring: kill REQ_F_LINK_NEXT")
>     9b5f7bd93272 ("io_uring: replace find_next() out param with ret")
>     a1d7c393c471 ("io_uring: enable READ/WRITE to use deferred completions")
>     b63534c41e20 ("io_uring: re-issue block requests that failed because of resources")
>     bcf5a06304d6 ("io_uring: support true async buffered reads, if file provides it")
>     c2c4c83c58cb ("io_uring: use new io_req_task_work_add() helper throughout")
>     c40f63790ec9 ("io_uring: use task_work for links if possible")
>     e1e16097e265 ("io_uring: provide generic io_req_complete() helper")
> 
> v5.7.15: Failed to apply! Possible dependencies:
>     0cdaf760f42e ("io_uring: remove req->needs_fixed_files")
>     310672552f4a ("io_uring: async task poll trigger cleanup")
>     3fa5e0f33128 ("io_uring: optimise io_req_find_next() fast check")
>     405a5d2b2762 ("io_uring: avoid unnecessary io_wq_work copy for fast poll feature")
>     4a38aed2a0a7 ("io_uring: batch reap of dead file registrations")
>     4dd2824d6d59 ("io_uring: lazy get task")
>     7c86ffeeed30 ("io_uring: deduplicate freeing linked timeouts")
>     7cdaf587de7c ("io_uring: avoid whole io_wq_work copy for requests completed inline")
>     7d01bd745a8f ("io_uring: remove obsolete 'state' parameter")
>     9b0d911acce0 ("io_uring: kill REQ_F_LINK_NEXT")
>     9b5f7bd93272 ("io_uring: replace find_next() out param with ret")
>     c2c4c83c58cb ("io_uring: use new io_req_task_work_add() helper throughout")
>     c40f63790ec9 ("io_uring: use task_work for links if possible")
>     d4c81f38522f ("io_uring: don't arm a timeout through work.func")
>     f5fa38c59cb0 ("io_wq: add per-wq work handler instead of per work")
> 
> 
> NOTE: The patch will not be queued to stable trees until it is upstream.
> 
> How should we proceed with this patch?

It's already queued for 5.7 and 5.8 stable. At least it should be, I'll double
check!

-- 
Jens Axboe