linux-kernel - Re: [PATCH v3] blk: optimization for classic polling

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <f797a075-4ef2-410f-4eda-fa70d426d58f@kernel.dk>
Date:   Tue, 13 Feb 2018 09:12:18 -0700
From:   Jens Axboe <axboe@...nel.dk>
To:     Nitesh Shetty <nj.shetty@...sung.com>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     axboe@...nel.dk, linux-nvme@...ts.infradead.org,
        joshi.k@...sung.com
Subject: Re: [PATCH v3] blk: optimization for classic polling

On 2/13/18 8:48 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.

Thanks, applied.

-- 
Jens Axboe