linux-kernel - Re: System "hangs" on kernels > v4.4-rc1

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Message-ID: <yq137u8iyue.fsf@sermon.lab.mkp.net>
Date:	Thu, 07 Jan 2016 21:34:01 -0500
From:	"Martin K. Petersen" <martin.petersen@...cle.com>
To:	"Luck\, Tony" <tony.luck@...el.com>
Cc:	"linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-scsi\@vger.kernel.org" <linux-scsi@...r.kernel.org>
Subject: Re: System "hangs" on kernels > v4.4-rc1 - mpt2sas problem?

>>>>> "Tony" == Luck, Tony <tony.luck@...el.com> writes:

Tony,

Tony> This one has been hard for me to bisect. Partly because it just
Tony> takes so long to reboot the servers that have the problem, but
Tony> also because there may be more than one thing going on.  One thing
Tony> that seems pretty certain is that things are OK prior to:

We consolidated the mpt2sas and mpt3sas drivers in 4.4. I can see the
driver getting loaded (and failing to allocate memory for some reason)
in your first log but it's absent in the second.

Tony>     megaraid_sas: Increase timeout to 60 secs for abort frames
Tony> during shutdown

megaraid_sas is an entirely different beast from mpt[23]sas. Please let
us know which type of controller your disks are hanging off of.

-- 
Martin K. Petersen	Oracle Linux Engineering