linux-kernel - Re: [PATCH] xen: fix the check of e_pfn in xen_find_pfn

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Message-ID: <55F77C50.5040702@oracle.com>
Date:	Tue, 15 Sep 2015 10:02:56 +0800
From:	Zhenzhong Duan <zhenzhong.duan@...cle.com>
To:	david.vrabel@...rix.com
Cc:	Juergen Gross <jgross@...e.com>,
	LKML <linux-kernel@...r.kernel.org>, konrad.wilk@...cle.com,
	boris.ostrovsky@...cle.com
Subject: Re: [PATCH] xen: fix the check of e_pfn in xen_find_pfn_range

Hi David

Konrad just ping me on this patch. I originally think I missed to cc you 
but I does.
Could you ack or nak it?

thanks
zduan

在 2015/9/2 19:04, Juergen Gross 写道:
> On 09/02/2015 12:51 PM, Zhenzhong Duan wrote:
>> On some numa system, after dom0 up, we see below warning even if 
>> there are
>> enough pfn ranges could be used for remapping.
>> "Unable to find available pfn range, not remapping identity pages"
>>
>> Fix it to avoid getting a memory region of zero size in 
>> xen_find_pfn_range.
>>
>> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@...cle.com>
>
> Reviewed-by: Juergen Gross <jgross@...e.com>
>
>> ---
>>   arch/x86/xen/setup.c |    2 +-
>>   1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
>> index a3a7546..c11f6b2 100644
>> --- a/arch/x86/xen/setup.c
>> +++ b/arch/x86/xen/setup.c
>> @@ -178,7 +178,7 @@ static unsigned long __init xen_find_pfn_range(
>>           e_pfn = PFN_DOWN(entry->addr + entry->size);
>>
>>           /* We only care about E820 after this */
>> -        if (e_pfn < *min_pfn)
>> +        if (e_pfn <= *min_pfn)
>>               continue;
>>
>>           s_pfn = PFN_UP(entry->addr);
>

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