From: Jens Axboe <axboe@kernel.dk>
To: Nitesh Shetty <nj.shetty@samsung.com>,
linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: linux-nvme@lists.infradead.org, joshi.k@samsung.com
Subject: Re: [PATCH v2 RESENT] blk: optimization for classic polling
Date: Tue, 13 Feb 2018 07:42:20 -0700 [thread overview]
Message-ID: <620867e2-2a0c-5c32-10c6-7cc5268ac944@kernel.dk> (raw)
In-Reply-To: <1518548206-4766-1-git-send-email-nj.shetty@samsung.com>
On 2/13/18 11:56 AM, Nitesh Shetty wrote:
> This removes the dependency on interrupts to wake up task. Set task
> state as TASK_RUNNING, if need_resched() returns true,
> while polling for IO completion.
> Earlier, polling task used to sleep, relying on interrupt to wake it up.
> This made some IO take very long when interrupt-coalescing is enabled in
> NVMe.
__set_current_state() should suffice here.
--
Jens Axboe
next prev parent reply other threads:[~2018-02-13 14:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20180208143655epcas1p444bf34705526b7839a5a135f82761aad@epcas1p4.samsung.com>
2083-05-30 4:21 ` [PATCH] blk: optimization for classic polling Nitesh Shetty
2018-02-08 15:27 ` Keith Busch
2018-02-08 16:03 ` Sagi Grimberg
[not found] ` <CGME20180213082701epcas1p4d92a86f127a0918fb9d62120bd121cb6@epcas1p4.samsung.com>
[not found] ` <1518548206-4766-1-git-send-email-nj.shetty@samsung.com>
2018-02-13 14:42 ` Jens Axboe [this message]
2018-02-20 13:21 ` Peter Zijlstra
2018-02-20 16:27 ` Keith Busch
2018-02-20 22:37 ` Jens Axboe
2018-02-21 8:32 ` Peter Zijlstra
2018-10-10 18:52 ` Florian Fainelli
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