linux-kernel - Re: [PATCH net-next v2 2/2] cxgb4: collect hardware dump in second kernel

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Message-ID: <20180324151852.GE31941@lunn.ch>
Date:   Sat, 24 Mar 2018 16:18:52 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
Cc:     netdev@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
        davem@...emloft.net, viro@...iv.linux.org.uk,
        ebiederm@...ssion.com, stephen@...workplumber.org,
        akpm@...ux-foundation.org, torvalds@...ux-foundation.org,
        ganeshgr@...lsio.com, nirranjan@...lsio.com, indranil@...lsio.com
Subject: Re: [PATCH net-next v2 2/2] cxgb4: collect hardware dump in second
 kernel

On Sat, Mar 24, 2018 at 04:26:34PM +0530, Rahul Lakkireddy wrote:
> Register callback to collect hardware/firmware dumps in second kernel
> before hardware/firmware is initialized.  The dumps for each device
> will be available under /sys/kernel/crashdd/cxgb4/ directory in second
> kernel.
> 
> Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
> Signed-off-by: Ganesh Goudar <ganeshgr@...lsio.com>

Thanks for adding generic documentation about the files in sysfs.

However, you don't add any specific documentation here about the cxgb4
crash dump. How am i supposed to interpret it? Does it follow any of
the standard core dump formats? How do i use gdb with it? Are there
some specific tools i should use to analyse it?

Thanks
	Andrew