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Message-ID: <20131226021705.GC3750@dhcp-16-126.nay.redhat.com>
Date:	Thu, 26 Dec 2013 10:17:06 +0800
From:	Dave Young <dyoung@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	matt@...sole-pimps.org, greg@...ah.com,
	linux-kernel@...r.kernel.org, linux-efi@...r.kernel.org,
	kexec@...ts.infradead.org, horms@...ge.net.au
Subject: Re: split efi systab in sysfs

CCing Simon and kexec list

On 12/26/13 at 10:12am, Dave Young wrote:
> On 12/25/13 at 05:55pm, H. Peter Anvin wrote:
> > On 12/25/2013 05:53 PM, Dave Young wrote:
> > > Hi, Matt and Peter
> > > 
> > > Currently /sys/firmware/efi/systab contains multi-lines for efi systab
> > > entries. As previous discussion with Greg, this is not a good in sysfs.
> > > I wonder if there's other users for this file except kexec-tools.
> > > 
> > > If kexec-tools is the only user, maybe I can split it as several files.
> > > In kexec-tools just use /sys/firmware/efi/"$entry_name" and if $entry_name
> > > does not exist then switch to old systab file. 
> > > 
> > 
> > Yes, the sysfs standard is "one entry per datum".  I have no idea about
> > who the user(s) might be, though.
> 
> Even the only known user kexec-tools, for new kernel + old kexec-tools we
> have no way to support, maybe this systab should be kept forever...
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