linux-kernel - Re: [PATCH 1/2] x86,mem-hotplug: pass sync_global_pgds() a correct argument in remove

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Message-ID: <1403288831.25108.0.camel@misato.fc.hp.com>
Date:	Fri, 20 Jun 2014 12:27:11 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
Cc:	akpm@...ux-foundation.org, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, tangchen@...fujitsu.com,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, x86@...nel.org,
	guz.fnst@...fujitsu.com, zhangyanfei@...fujitsu.com
Subject: Re: [PATCH 1/2] x86,mem-hotplug: pass sync_global_pgds() a correct
 argument in remove_pagetable()

On Wed, 2014-06-18 at 15:37 +0900, Yasuaki Ishimatsu wrote:
> remove_pagetable() gets start argument and passes the argument to
> sync_global_pgds(). In this case, the argument must not be modified.
> If the argument is modified and passed to sync_global_pgds(),
> sync_global_pgds() does not correctly synchronize PGD to PGD entries
> of all processes MM since synchronized range of memory [start, end]
> is wrong.
> 
> Unfortunately the start argument is modified in remove_pagetable().
> So this patch fixes the issue.
> 
> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>

Acked-by: Toshi Kani <toshi.kani@...com>

Thanks,
-Toshi


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