linux-kernel - Re: [PATCH net-next v4 1/3] vmcore: add API to collect hardware dump in second kernel

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Message-ID: <20180419082456.GA8617@kroah.com>
Date:   Thu, 19 Apr 2018 10:24:56 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Rahul Lakkireddy <rahul.lakkireddy@...lsio.com>
Cc:     netdev@...r.kernel.org, kexec@...ts.infradead.org,
        linux-fsdevel@...r.kernel.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 v4 1/3] vmcore: add API to collect hardware dump
 in second kernel

On Tue, Apr 17, 2018 at 01:14:17PM +0530, Rahul Lakkireddy wrote:
> +config PROC_VMCORE_DEVICE_DUMP
> +	bool "Device Hardware/Firmware Log Collection"
> +	depends on PROC_VMCORE
> +	default y

Only things that require the machine to keep working should be 'default
y', please remove this, it's an option.

> +	help
> +	  Device drivers can collect the device specific snapshot of
> +	  their hardware or firmware before they are initialized in
> +	  crash recovery kernel. If you say Y here, the device dumps
> +	  will be added as ELF notes to /proc/vmcore

Which exact "device drivers" are you referring to here?

thanks,

greg k-h