linux-kernel - Re: [Bug] Reproducible data corruption on i5-3340M: Please revert 53a59fc67!

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Message-ID: <87ioz67qq0.fsf@nemi.mork.no>
Date:	Thu, 15 Aug 2013 20:29:11 +0200
From:	Bjørn Mork <bjorn@...k.no>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Ben Tebulin <tebulin@...glemail.com>,
	Michal Hocko <mhocko@...e.cz>, Mel Gorman <mgorman@...e.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Balbir Singh <bsingharora@...il.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-mm <linux-mm@...ck.org>, Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"linux-arch\@vger.kernel.org" <linux-arch@...r.kernel.org>
Subject: Re: [Bug] Reproducible data corruption on i5-3340M: Please revert 53a59fc67!

Linus Torvalds <torvalds@...ux-foundation.org> writes:

> Comments? Especially s390, ARM, ia64, sh and um that I edited blindly...

I can see that :-)  You have a couple of "unsigned logn"s here.


Bjørn

> --- a/arch/arm64/include/asm/tlb.h
> +++ b/arch/arm64/include/asm/tlb.h
> @@ -35,6 +35,7 @@ struct mmu_gather {
>  	struct mm_struct	*mm;
>  	unsigned int		fullmm;
>  	struct vm_area_struct	*vma;
> +	unsigned long		start, end;
>  	unsigned long		range_start;
>  	unsigned long		range_end;
>  	unsigned int		nr;
> @@ -97,10 +98,12 @@ static inline void tlb_flush_mmu(struct mmu_gather *tlb)
>  }
>  
>  static inline void
> -tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned int fullmm)
> +tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long start, unsigned logn end)

[..]

> diff --git a/arch/sh/include/asm/tlb.h b/arch/sh/include/asm/tlb.h
> index e61d43d9f689..47745b255721 100644
> --- a/arch/sh/include/asm/tlb.h
> +++ b/arch/sh/include/asm/tlb.h
> @@ -36,10 +36,12 @@ static inline void init_tlb_gather(struct mmu_gather *tlb)
>  }
>  
>  static inline void
> -tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned int full_mm_flush)
> +tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long start, unsigned logn end)
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