linux-kernel - Re: [PATCH 13/18] asm-generic/tlb: Introduce HAVE_MMU_GATHER_NO

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Message-Id: <87zhtcsjo7.fsf@linux.ibm.com>
Date:   Tue, 11 Dec 2018 11:13:04 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
To:     Peter Zijlstra <peterz@...radead.org>, will.deacon@....com,
        aneesh.kumar@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
        npiggin@...il.com
Cc:     linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, peterz@...radead.org,
        linux@...linux.org.uk, heiko.carstens@...ibm.com, riel@...riel.com,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [PATCH 13/18] asm-generic/tlb: Introduce HAVE_MMU_GATHER_NO_GATHER

Peter Zijlstra <peterz@...radead.org> writes:

> From: Martin Schwidefsky <schwidefsky@...ibm.com>
>
> Add the Kconfig option HAVE_MMU_GATHER_NO_GATHER to the generic
> mmu_gather code. If the option is set the mmu_gather will not
> track individual pages for delayed page free anymore. A platform
> that enables the option needs to provide its own implementation
> of the __tlb_remove_page_size function to free pages.

Can we rename this to HAVE_NO_BATCH_MMU_GATHER? 

>
> Cc: npiggin@...il.com
> Cc: heiko.carstens@...ibm.com
> Cc: will.deacon@....com
> Cc: aneesh.kumar@...ux.vnet.ibm.com
> Cc: akpm@...ux-foundation.org
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: linux@...linux.org.uk
> Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> Link: http://lkml.kernel.org/r/20180918125151.31744-2-schwidefsky@de.ibm.com

-aneesh