linux-kernel - Re: [PATCH] memmap: Parse "Reserved" together with "reserved"

Open Source and information security mailing list archives

Date:   Wed, 26 Apr 2017 12:49:24 +0200
From:   Simon Horman <horms@...ge.net.au>
To:     Dave Young <dyoung@...hat.com>
Cc:     Ingo Molnar <mingo@...nel.org>, Yinghai Lu <yinghai@...nel.org>,
        kexec@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] memmap: Parse "Reserved" together with "reserved"

On Wed, Apr 26, 2017 at 03:31:48PM +0800, Dave Young wrote:
> On 04/26/17 at 03:28pm, Dave Young wrote:
> > On 04/26/17 at 08:22am, Ingo Molnar wrote:
> > > 
> > > * Yinghai Lu <yinghai@...nel.org> wrote:
> > > 
> > > > For x86 with recent kernel after
> > > >  commit 640e1b38b0 ("x86/boot/e820: Basic cleanup of e820.c")
> > > > change "reserved" to "Reserved" in /sys firmware memmap and /proc/iomem.
> > > > 
> > > > So here, we add handling for that too.
> > > > 
> > > > Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> > > > 
> > > > ---
> > > >  kexec/arch/i386/crashdump-x86.c |    2 ++
> > > >  kexec/arch/ia64/kexec-ia64.c    |    2 ++
> > > >  kexec/arch/mips/kexec-mips.c    |    2 ++
> > > >  kexec/firmware_memmap.c         |    2 ++
> > > >  4 files changed, 8 insertions(+)
> > > 
> > > I'd rather fix the bug I introduced and undo the reserved->Reserved string change 
> > 
> > This patch parses both 'reserved' and 'Reserved' it should be fine, but
> > reverting the change in kernel sounds better..
> 
> Hmm, after press sending I noticed old kexec-tools with new kernel, it
> is still a problem, so we'd better to revert the kernel changes.

FWIW, if the kernel change hasn't hit a release then reverting (the
reserved->Reserved portion of) it would be my preference.

> > > in e820.c: I didn't realize that it's exposed in sysfs and had quasi-ABI 
> > > consequences for kexec.
> > > 
> > > Agreed?
> > > 
> > > Thanks,
> > > 
> > > 	Ingo
> > > 
> > > _______________________________________________
> > > kexec mailing list
> > > kexec@...ts.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/kexec
> > 
> > Thanks
> > Dave
> 

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