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Date:      Fri, 16 Sep 2016 14:48:49 -0700
From:      hiren panchasara <hiren@strugglingcoder.info>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        Konstantin Belousov <kostikbel@gmail.com>, jch@FreeBSD.org, freebsd-stable@FreeBSD.org
Subject:   Re: 11.0 stuck on high network load
Message-ID:  <20160916214849.GS9397@strugglingcoder.info>
In-Reply-To: <20160916214646.GR9397@strugglingcoder.info>
References:  <20160905014612.GA42393@strugglingcoder.info> <20160914213503.GJ2840@zxy.spb.ru> <20160915085938.GN38409@kib.kiev.ua> <20160915090633.GS2840@zxy.spb.ru> <20160916181839.GC2960@zxy.spb.ru> <20160916183053.GL9397@strugglingcoder.info> <20160916190330.GG2840@zxy.spb.ru> <20160916191155.GM9397@strugglingcoder.info> <20160916203057.GH2840@zxy.spb.ru> <20160916214646.GR9397@strugglingcoder.info>

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On 09/16/16 at 02:46P, hiren panchasara wrote:
> On 09/16/16 at 11:30P, Slawa Olhovchenkov wrote:
> > On Fri, Sep 16, 2016 at 12:11:55PM -0700, hiren panchasara wrote:
> >=20
> > >=20
> > > As I suspected, this looks like a hang trying to lock V_tcbinfo.
> > >=20
> > > I'm ccing Julien here who worked on WLOCK -> RLOCK transition to impr=
ove
> > > performance for short-lived connections. I am not too sure if thats t=
he
> > > problem but looks in similar area so he may be able to provide some
> > > insights.
> >=20
> > No, this is other case. In may case at this time no network traffic
> > more then hour. This is some sore of deadlock or like.
>=20
> In my limited understanding, such deadlock like situation can occur
> without traffic too.

Err, I meant to say light traffic.

Cheers,
Hiren

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