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Date: Wed, 4 May 2011 09:58:38 +0200
Message-ID: <BANLkTinMod1M=xrVDFbbyMLtyujQ=HjEYg@mail.gmail.com>
From: Olivier Smedts <olivier@gid0.org>
To: Jack Vogel <jfvogel@gmail.com>
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Cc: FreeBSD current mailing list <current@freebsd.org>,
	Michael Schmiedgen <schmiedgen@gmx.net>, Mike Tancsa <mike@sentex.net>
Subject: Re: problems with em(4) since update to driver 7.2.2
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2011/5/4 Jack Vogel <jfvogel@gmail.com>:
> It has nothing to do with load, it has to do with the prerequisites to in=
it
> your interfaces.
> The amount you need is fixed, it doesn't vary with load. Every RX descrip=
tor
> needs one,
> so its simple math, number-of-interfaces X number-of-queues X size of the
> ring.
>
> If you have other network interfaces beside Intel they also consume mbufs
> remember.

Only one network interface.
# kldunload if_em.ko
(the old one)
# sysctl kern.ipc.nmbclusters=3D512000
(I also tried with lower and more meaningful values)
# kldload ./if_em.ko
(the new one)
# dmesg
em0: detached
pci0: <network, ethernet> at device 25.0 (no driver attached)
em0: <Intel(R) PRO/1000 Network Connection 7.2.3> port 0x2100-0x211f
mem 0xf0000000-0xf001ffff,0xf0025000-0xf0025fff irq 19 at device 25.0
on pci0
em0: Using an MSI interrupt
em0: Ethernet address: d4:85:64:b2:aa:f5
em0: Could not setup receive structures
em0: Could not setup receive structures

What can we do to help you debug this ?

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