From: Bart Van Assche <bvanassche@acm.org>
To: Christoph Hellwig <hch@infradead.org>,
Nathan Huckleberry <nhuck@google.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Mike Snitzer <snitzer@kernel.org>,
linux-kernel@vger.kernel.org, Eric Biggers <ebiggers@kernel.org>,
dm-devel@redhat.com, Sami Tolvanen <samitolvanen@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Alasdair Kergon <agk@redhat.com>
Subject: Re: [dm-devel] [PATCH 0/3] dm-verity: optionally use tasklets in dm-verity
Date: Fri, 22 Jul 2022 11:12:38 -0700 [thread overview]
Message-ID: <cabd732a-9942-3ece-8141-c0bc6378faca@acm.org> (raw)
In-Reply-To: <YtrTI/CJMoLihA/1@infradead.org>
On 7/22/22 09:41, Christoph Hellwig wrote:
> We've been tying to kill off task lets for about 15 years. I don't
> think adding new users will make you a whole lot of friends..
+1 for not using tasklets. At least in Android the real-time thread
scheduling latency is important. Tasklets are not visible to the
scheduler and hence cause latency spikes for real-time threads. These
latency spikes can be observed by users, e.g. if the real-time thread is
involved in audio playback.
Bart.
next prev parent reply other threads:[~2022-07-22 18:12 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-22 9:38 [PATCH 0/3] dm-verity: optionally use tasklets in dm-verity Nathan Huckleberry
2022-07-22 9:38 ` [PATCH 1/3] dm-bufio: Add flags for dm_bufio_client_create Nathan Huckleberry
2022-07-22 9:38 ` [PATCH 2/3] dm-bufio: Add DM_BUFIO_GET_CANT_SLEEP Nathan Huckleberry
2022-07-22 9:38 ` [PATCH 3/3] dm-verity: Add try_verify_in_tasklet Nathan Huckleberry
2022-07-26 1:58 ` Mike Snitzer
2022-07-26 3:06 ` Eric Biggers
2022-07-26 4:13 ` Mike Snitzer
2022-07-22 16:41 ` [PATCH 0/3] dm-verity: optionally use tasklets in dm-verity Christoph Hellwig
2022-07-22 17:12 ` Mike Snitzer
2022-08-15 11:35 ` Sebastian Andrzej Siewior
2022-07-22 18:12 ` Bart Van Assche [this message]
2022-07-22 18:33 ` Mike Snitzer
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