linux-kernel - RE: [PATCH] Linux VM workaround for Knights Landing A/D leak

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Message-ID: <C1C2579D7BE026428F81F41198ADB17237A857BF@irsmsx110.ger.corp.intel.com>
Date:	Tue, 14 Jun 2016 16:54:30 +0000
From:	"Anaczkowski, Lukasz" <lukasz.anaczkowski@...el.com>
To:	Nadav Amit <nadav.amit@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
	"mhocko@...e.com" <mhocko@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Srinivasappa, Harish" <harish.srinivasappa@...el.com>,
	"Odzioba, Lukasz" <lukasz.odzioba@...el.com>
Subject: RE: [PATCH] Linux VM workaround for Knights Landing A/D leak

From: Nadav Amit [mailto:nadav.amit@...il.com] 
Sent: Tuesday, June 14, 2016 6:48 PM

> Lukasz Anaczkowski <lukasz.anaczkowski@...el.com> wrote:

>> From: Andi Kleen <ak@...ux.intel.com>
>> +void fix_pte_leak(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
>> +{
> Here there should be a call to smp_mb__after_atomic() to synchronize with
> switch_mm. I submitted a similar patch, which is still pending (hint).

Thanks, Nadav!
I'll add this and re-submit the patch.

Cheers,
Lukasz