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From: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Cc: akpm@linux-foundation.org, torvalds@linux-foundation.org,
	davem@davemloft.net, ganeshgr@chelsio.com, nirranjan@chelsio.com,
	indranil@chelsio.com, rahul.lakkireddy@chelsio.com
Subject: Appending firmware/hardware dump to vmcore during kernel panic
Date: Tue, 20 Feb 2018 16:26:14 +0530	[thread overview]
Message-ID: <20180220105613.GA9766@chelsio.com> (raw)

Hi all,

We have a requirement to collect firmware/hardware state of the
underlying NIC during kernel panic.  We are doing this in cxgb4
driver, using panic notifier list [1].  cxgb4 registers a callback
function to the panic notifier list, which gets invoked during kernel
panic. In the callback function, firmware/hardware dump is collected
into pre-allocated buffer and then extracted later from the vmcore,
for post-analysis.

Is this approach of using panic notifier correct?  Any suggestions are
much appreciated.

Thanks,
Rahul

[1] https://patchwork.ozlabs.org/patch/873830/

                 reply	other threads:[~2018-02-20 10:56 UTC|newest]

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