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From: Peter Zijlstra <peterz@infradead.org>
To: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: will.deacon@arm.com, aneesh.kumar@linux.vnet.ibm.com,
	akpm@linux-foundation.org, npiggin@gmail.com,
	linux-arch@vger.kernel.org, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, linux@armlinux.org.uk,
	heiko.carstens@de.ibm.com
Subject: Re: [RFC][PATCH 01/11] asm-generic/tlb: Provide a comment
Date: Thu, 13 Sep 2018 14:39:37 +0200	[thread overview]
Message-ID: <20180913123937.GX24124@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20180913141827.1776985e@mschwideX1>

On Thu, Sep 13, 2018 at 02:18:27PM +0200, Martin Schwidefsky wrote:
> We may get something working with a common code mmu_gather, but I fear the
> day someone makes a "minor" change to that subtly break s390. The debugging of
> TLB related problems is just horrible..

Yes it is, not just on s390 :/

And this is not something that's easy to write sanity checks for either
AFAIK. I mean we can do a few multi-threaded mmap()/mprotect()/munmap()
proglets and catch faults, but that doesn't even get close to covering
all the 'fun' spots.

Then again, you're more than welcome to the new:

  MMU GATHER AND TLB INVALIDATION

section in MAINTAINERS.

  reply	other threads:[~2018-09-13 12:39 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-13  9:21 [RFC][PATCH 00/11] my generic mmu_gather patches Peter Zijlstra
2018-09-13  9:21 ` [RFC][PATCH 01/11] asm-generic/tlb: Provide a comment Peter Zijlstra
2018-09-13 10:30   ` Martin Schwidefsky
2018-09-13 10:57     ` Peter Zijlstra
2018-09-13 12:18       ` Martin Schwidefsky
2018-09-13 12:39         ` Peter Zijlstra [this message]
2018-09-14 10:28           ` Martin Schwidefsky
2018-09-14 13:02             ` Peter Zijlstra
2018-09-14 14:07               ` Martin Schwidefsky
2018-09-14 16:48   ` Will Deacon
2018-09-19 11:33     ` Peter Zijlstra
2018-09-19 11:51     ` Peter Zijlstra
2018-09-19 12:23       ` Will Deacon
2018-09-19 13:12         ` Peter Zijlstra
2018-09-13  9:21 ` [RFC][PATCH 02/11] asm-generic/tlb: Provide HAVE_MMU_GATHER_PAGE_SIZE Peter Zijlstra
2018-09-14 16:56   ` Will Deacon
2018-09-13  9:21 ` [RFC][PATCH 03/11] x86/mm: Page size aware flush_tlb_mm_range() Peter Zijlstra
2018-09-13 17:22   ` Dave Hansen
2018-09-13 18:42     ` Peter Zijlstra
2018-09-13 18:46       ` Peter Zijlstra
2018-09-13 18:48         ` Peter Zijlstra
2018-09-13 18:49         ` Dave Hansen
2018-09-13 18:47       ` Dave Hansen
2018-09-13  9:21 ` [RFC][PATCH 04/11] asm-generic/tlb: Provide generic VIPT cache flush Peter Zijlstra
2018-09-14 16:56   ` Will Deacon
2018-09-13  9:21 ` [RFC][PATCH 05/11] asm-generic/tlb: Provide generic tlb_flush Peter Zijlstra
2018-09-13 13:09   ` Jann Horn
2018-09-13 14:06     ` Peter Zijlstra
2018-09-13  9:21 ` [RFC][PATCH 06/11] asm-generic/tlb: Conditionally provide tlb_migrate_finish() Peter Zijlstra
2018-09-14 16:57   ` Will Deacon
2018-09-13  9:21 ` [RFC][PATCH 07/11] arm/tlb: Convert to generic mmu_gather Peter Zijlstra
2018-09-18 14:10   ` Will Deacon
2018-09-19 11:28     ` Peter Zijlstra
2018-09-19 12:24       ` Will Deacon
2018-09-19 11:30     ` Peter Zijlstra
2018-09-13  9:21 ` [RFC][PATCH 08/11] ia64/tlb: Conver " Peter Zijlstra
2018-09-13  9:21 ` [RFC][PATCH 09/11] sh/tlb: Convert SH " Peter Zijlstra
2018-09-13  9:21 ` [RFC][PATCH 10/11] um/tlb: Convert " Peter Zijlstra
2018-09-13  9:21 ` [RFC][PATCH 11/11] arch/tlb: Clean up simple architectures Peter Zijlstra

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