Date: Sun, 30 Oct 2011 10:33:30 -0400 From: Ryan Stone <rysto32@gmail.com> To: Hooman Fazaeli <hoomanfazaeli@gmail.com> Cc: pyunyh@gmail.com, freebsd-net@freebsd.org, Jason Wolfe <nitroboost@gmail.com>, Jack Vogel <jfvogel@gmail.com>, Emil Muratov <gpm@hotplug.ru> Subject: Re: Intel 82574L interface wedging on em 7.1.9/7.2.3 when MSIX enabled Message-ID: <CAFMmRNxPGJ%2BDQ2giaFbofAmC6progTmW7haKmRCKV3NsniRsNQ@mail.gmail.com> In-Reply-To: <4EAD116A.8090006@gmail.com> References: <CAAAm0r0RXEJo4UiKS=Ui0e5OQTg6sg-xcYf3mYB5%2Bvk8i8557w@mail.gmail.com> <4E8F157A.40702@sentex.net> <CAAAm0r2JH43Rct7UxQK2duH1p43Nepnj5mpb6bXo==DPayhJLg@mail.gmail.com> <4E8F51D4.1060509@sentex.net> <CACqU3MVwLaepFymZJkaVk6p=SpykGhqs=VYFjLh9fP9S=AxDhg@mail.gmail.com> <CAAAm0r1DKvoL9=Ket9up=4%2B5xiCzTTZJK99FhF9jcCA28B0M%2BA@mail.gmail.com> <CAAAm0r3XdsMHZh%2BP_NF-txZasdExzwZ8ymmGQgGhJQds0fOiBQ@mail.gmail.com> <CAAAm0r1iS3z-7CBJ=xYDf%2BJOA1Q2nU0O54Twbyb7FjvgWHjKVw@mail.gmail.com> <4EA7E203.3020306@sepehrs.com> <CAAAm0r3Nr2t8cCetPkFnLQ-3KwqHw_0SpqbtvYPRUkSP=9n8CA@mail.gmail.com> <4EA80818.3030504@sentex.net> <4EA80F88.4000400@hotplug.ru> <4EA82715.2000404@gmail.com> <4EA8FA40.7010504@hotplug.ru> <4EA91836.2040508@gmail.com> <4EA959EE.2070806@hotplug.ru> <4EAD116A.8090006@gmail.com>
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On Sun, Oct 30, 2011 at 4:57 AM, Hooman Fazaeli <hoomanfazaeli@gmail.com> wrote: > IMHO, this is not a driver issue and the real fix would be to change > IFQ_HANDOFF to call if_start when the queue is full. I'm not sure that's the right approach. 99% of the time, calling if_start when the queue is full will be a waste of time. It seems to me that the link interrupt handler needs to kick off the tx task to drain the tx queue instead.home | help
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