Date: Thu, 13 Feb 2014 12:44:43 -0500 From: Garrett Wollman <wollman@bimajority.org> To: John-Mark Gurney <jmg@funkthat.com> Cc: FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: Use of contiguous physical memory in cxgbe driver Message-ID: <21245.1163.754141.154430@hergotha.csail.mit.edu> In-Reply-To: <20140213075651.GY34851@funkthat.com> References: <21216.22944.314697.179039@hergotha.csail.mit.edu> <201402111348.52135.jhb@freebsd.org> <CAJ-VmonCdNQPUCQwm0OhqQ3Kt_7x6-g-JwGVZQfzWTgrDYfmqw@mail.gmail.com> <201402121446.19278.jhb@freebsd.org> <21244.20212.423983.960018@hergotha.csail.mit.edu> <20140213075651.GY34851@funkthat.com>
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<<On Wed, 12 Feb 2014 23:56:51 -0800, John-Mark Gurney <jmg@funkthat.com> said: > Though we might want to keep a few mbufs reserved for receive now that > you mention it... We should never get to the point where we can't > allocate even one frame for receive... It's very easy to get to that state if the driver insists on getting three physically contiguous pages (which is what it takes to allocate a single 9k cluster) -GAWollman
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