linux-kernel - Re: [PATCH 4/6] x86/coredump: use core regs, rather that TIF

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Message-ID: <ce1fd1fc-a790-a164-15de-7407a33c44f5@virtuozzo.com>
Date:	Fri, 3 Jun 2016 12:56:30 +0300
From:	Dmitry Safonov <dsafonov@...tuozzo.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
CC:	<linux-kernel@...r.kernel.org>, <mingo@...hat.com>,
	<luto@...capital.net>, <tglx@...utronix.de>, <hpa@...or.com>,
	<x86@...nel.org>, <0x7f454c46@...il.com>, <oleg@...hat.com>,
	<xemul@...tuozzo.com>, <khorenko@...tuozzo.com>,
	Andy Lutomirski <luto@...nel.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	<linux-fsdevel@...r.kernel.org>
Subject: Re: [PATCH 4/6] x86/coredump: use core regs, rather that TIF_IA32
 flag

On 06/03/2016 12:51 PM, Cyrill Gorcunov wrote:
> On Wed, Jun 01, 2016 at 04:11:35PM +0300, Dmitry Safonov wrote:
>> As we have here core registers, use them to determine application's
>> mode and sizes of register set and elf_prstatus instead of TIF_IA32
>> flag.
>>
>> Cc: Andy Lutomirski <luto@...nel.org>
>> Cc: Ingo Molnar <mingo@...hat.com>
>> Cc: Thomas Gleixner <tglx@...utronix.de>
>> Cc: "H. Peter Anvin" <hpa@...or.com>
>> Cc: Oleg Nesterov <oleg@...hat.com>
>> Cc: Alexander Viro <viro@...iv.linux.org.uk>
>> Cc: linux-fsdevel@...r.kernel.org
>> Signed-off-by: Dmitry Safonov <dsafonov@...tuozzo.com>
>
> This can be used unrelated to vdso re-mapping idea, right?
>

Right -- 4,5,6 are pathes for dropping TIF_IA32 flag.
I put them in this patches set because of their goal,
to make tasks independent of presence of TIF_IA32.