linux-kernel - Re: [PATCH 0/3 v2] Fix kdump failures with crashkernel=high

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Message-ID: <20150214161135.GJ29106@8bytes.org>
Date:	Sat, 14 Feb 2015 17:11:35 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Baoquan He <bhe@...hat.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	Joerg Roedel <jroedel@...e.de>
Subject: Re: [PATCH 0/3 v2] Fix kdump failures with crashkernel=high

Hi Baoquan,

On Sat, Feb 14, 2015 at 06:58:34PM +0800, Baoquan He wrote:
> This patch is very helpful and necessary since several users complained
> about the failure caused by not enough low mem. And the default value
> 256M is suitable since the testing data showed it's sufficient
> now and should be save for a long time.
>  
> And it also makes sense to supress the warning from buddy allocation
> failure which will call dump_stack in x86_swiotlb_alloc_coherent. Since
> it tried buddy allocation several times before the final try of bounce
> buffer allocation.
> 
> So ack the whole patch set.
> 
> Acked-by: Baoquan He <bhe@...hat.com> 

Thanks a lot!

> Hi Joerg,
> 
> Thanks for your effort on this issue. 
> 
> Could you please also update the cover letter or patch log to tell
> how 256M comes out with the later test result? I think it is convincing
> and helpful to understand.

Sure thing, will update the patch description before I resend the
series.


Regards,

	Joerg

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