linux-kernel - Re: [PATCH v2 0/2] ublk: speed up ublk server exit handling

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Message-Id: <175164306375.597273.4784854727001872046.b4-ty@kernel.dk>
Date: Fri, 04 Jul 2025 09:31:03 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Ming Lei <ming.lei@...hat.com>, 
 Caleb Sander Mateos <csander@...estorage.com>, 
 Uday Shankar <ushankar@...estorage.com>
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] ublk: speed up ublk server exit handling


On Thu, 03 Jul 2025 23:41:06 -0600, Uday Shankar wrote:
> Recently, we've observed a few cases where a ublk server is able to
> complete restart more quickly than the driver can process the exit of
> the previous ublk server. The new ublk server comes up, attempts
> recovery of the preexisting ublk devices, and observes them still in
> state UBLK_S_DEV_LIVE. While this is possible due to the asynchronous
> nature of io_uring cleanup and should therefore be handled properly in
> the ublk server, it is still preferable to make ublk server exit
> handling faster if possible, as we should strive for it to not be a
> limiting factor in how fast a ublk server can restart and provide
> service again.
> 
> [...]

Applied, thanks!

[1/2] ublk: speed up ublk server exit handling
      commit: 2fa9c93035e17380cafa897ee1a4d503881a3770
[2/2] ublk: introduce and use ublk_set_canceling helper
      commit: 10d77a8c60b2b117868a64875a55c4c8db6f1f2e

Best regards,
-- 
Jens Axboe