linux-kernel - Re: Question about request queues in I/O scheduling

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Message-ID: <x49d1p8ctxu.fsf@segfault.boston.devel.redhat.com>
Date:	Fri, 29 Apr 2016 11:31:57 -0400
From:	Jeff Moyer <jmoyer@...hat.com>
To:	Max Kanushin <rextuz@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Question about request queues in I/O scheduling

Max Kanushin <rextuz@...il.com> writes:

> Hello,
>
> I was searching for a way to find out the length of a request_queue
> (that is defined as a structure in
> linux/include/linux/blkdev.h). However I am new to the kernel
> development and can't figure out where is the actual list of requests
> to be processed by an elevator.
> Is there a way to iterate requests in a queue or at least find a
> number of them?

Hi, Max,

What exactly are you trying to accomplish?

Cheers,
Jeff