linux-kernel - Re: [PATCH 1/2] x86: eliminate TS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4BDFCF9F.3030600@redhat.com>
Date:	Tue, 04 May 2010 10:41:19 +0300
From:	Avi Kivity <avi@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Suresh Siddha <suresh.b.siddha@...el.com>,
	Brian Gerst <brgerst@...il.com>,
	Dexuan Cui <dexuan.cui@...el.com>,
	Sheng Yang <sheng@...ux.intel.com>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: Re: [PATCH 1/2] x86: eliminate TS_XSAVE

On 05/04/2010 12:45 AM, H. Peter Anvin wrote:
>
>> I was trying to avoid a performance regression relative to the current
>> code, as it appears that some care was taken to avoid the memory reference.
>>
>> I agree that it's probably negligible compared to the save/restore
>> code.  If the x86 maintainers agree as well, I'll replace it with
>> cpu_has_xsave.
>>
>>      
> I asked Suresh to comment on this, since he wrote the original code.  He
> did confirm that the intent was to avoid a global memory reference.
>
>    

Ok, so you're happy with the patch as is?

-- 
error compiling committee.c: too many arguments to function

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/