From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Phillips <phillips@phunq.net>
Subject: Re: Block device throttling [Re: Distributed storage.]
Date: Tue, 14 Aug 2007 04:35:43 -0700
Message-ID: <200708140435.44979.phillips@phunq.net>
References: <20070731171347.GA14267@2ka.mipt.ru> <200708140413.12530.phillips@phunq.net> <20070814113039.GA20780@2ka.mipt.ru>
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Cc: Jens Axboe <jens.axboe@oracle.com>, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>
To: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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On Tuesday 14 August 2007 04:30, Evgeniy Polyakov wrote:
> > And it will not solve the deadlock problem in general.  (Maybe it
> > works for your virtual device, but I wonder...)  If the virtual
> > device allocates memory during generic_make_request then the memory
> > needs to be throttled.
>
> Daniel, if device process bio by itself, it has a limit and thus it
> will wait in generic_make_request()

What will make it wait?