From: Will Deacon <will.deacon@arm.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nick Piggin <npiggin@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Benjamin Herrenschmidt <benh@au1.ibm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 00/12] Avoid synchronous TLB invalidation for intermediate page-table entries on arm64
Date: Fri, 31 Aug 2018 10:54:18 +0100 [thread overview]
Message-ID: <20180831095417.GF13166@arm.com> (raw)
In-Reply-To: <CA+55aFyweLwdAeeLnPv1ceje2y9Qc2AkM+LdMzK_z29fFb96ug@mail.gmail.com>
On Thu, Aug 30, 2018 at 06:04:12PM -0700, Linus Torvalds wrote:
> On Thu, Aug 30, 2018 at 6:01 PM Nicholas Piggin <npiggin@gmail.com> wrote:
> >
> > Well it would help if powerpc say wanted to start using them without a
> > merge cycle lag. Not a huge issue because powerpc already does
> > reasonably well here and there's other work that can be done.
>
> Sure. If somebody wants to send the generic changes I can just take
> them directly to make it easier for people to work on this.
Tell you what: how about I stick the following patches (with Nick's and
Peter's acks) on a separate, stable branch:
asm-generic/tlb: Track which levels of the page tables have been cleared
asm-generic/tlb: Track freeing of page-table directories in struct mmu_gather
asm-generic/tlb: Guard with #ifdef CONFIG_MMU
and then anybody who needs them can just pull that in for the merge window?
Also, how would people feel about adding a MAINTAINERS entry for all the
tlb.h files? A big part of the recent "fun" was us figuring out what the
code is actually doing ("It used to do foo() but that may have changed").
and it certainly took me the best part of a day to figure things out again.
If we're trying to do more in the generic code and less in the arch code,
it would help if we're on top of the changes in this area.
Proposal below (omitted Linus because that seems to be the pattern elsewhere
in the file and he's not going to shout at himself when things break :)
Anybody I've missed?
Will
--->8
diff --git a/MAINTAINERS b/MAINTAINERS
index a5b256b25905..7224b5618883 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9681,6 +9681,15 @@ S: Maintained
F: arch/arm/boot/dts/mmp*
F: arch/arm/mach-mmp/
+MMU GATHER AND TLB INVALIDATION
+M: Will Deacon <will.deacon@arm.com>
+M: Nick Piggin <npiggin@gmail.com>
+M: Peter Zijlstra <peterz@infradead.org>
+L: linux-arch@vger.kernel.org
+S: Maintained
+F: include/asm-generic/tlb.h
+F: arch/*/include/asm/tlb.h
+
MN88472 MEDIA DRIVER
M: Antti Palosaari <crope@iki.fi>
L: linux-media@vger.kernel.org
next prev parent reply other threads:[~2018-08-31 9:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-30 16:15 [PATCH 00/12] Avoid synchronous TLB invalidation for intermediate page-table entries on arm64 Will Deacon
2018-08-30 16:15 ` [PATCH 01/12] arm64: tlb: Use last-level invalidation in flush_tlb_kernel_range() Will Deacon
2018-08-30 16:15 ` [PATCH 02/12] arm64: tlb: Add DSB ISHST prior to TLBI in __flush_tlb_[kernel_]pgtable() Will Deacon
2018-08-30 16:15 ` [PATCH 03/12] arm64: pgtable: Implement p[mu]d_valid() and check in set_p[mu]d() Will Deacon
2018-08-30 16:15 ` [PATCH 04/12] arm64: tlb: Justify non-leaf invalidation in flush_tlb_range() Will Deacon
2018-08-30 16:15 ` [PATCH 05/12] arm64: tlbflush: Allow stride to be specified for __flush_tlb_range() Will Deacon
2018-08-30 16:15 ` [PATCH 06/12] arm64: tlb: Remove redundant !CONFIG_HAVE_RCU_TABLE_FREE code Will Deacon
2018-08-30 16:15 ` [PATCH 07/12] asm-generic/tlb: Guard with #ifdef CONFIG_MMU Will Deacon
2018-08-30 16:15 ` [PATCH 08/12] asm-generic/tlb: Track freeing of page-table directories in struct mmu_gather Will Deacon
2018-08-30 16:15 ` [PATCH 09/12] asm-generic/tlb: Track which levels of the page tables have been cleared Will Deacon
2018-08-31 1:23 ` Nicholas Piggin
2018-08-30 16:15 ` [PATCH 10/12] arm64: tlb: Adjust stride and type of TLBI according to mmu_gather Will Deacon
2018-08-30 16:15 ` [PATCH 11/12] arm64: tlb: Avoid synchronous TLBIs when freeing page tables Will Deacon
2018-08-30 16:15 ` [PATCH 12/12] arm64: tlb: Rewrite stale comment in asm/tlbflush.h Will Deacon
2018-08-30 16:39 ` [PATCH 00/12] Avoid synchronous TLB invalidation for intermediate page-table entries on arm64 Linus Torvalds
2018-08-31 1:00 ` Nicholas Piggin
2018-08-31 1:04 ` Linus Torvalds
2018-08-31 9:54 ` Will Deacon [this message]
2018-08-31 10:10 ` Peter Zijlstra
2018-08-31 10:32 ` Nicholas Piggin
2018-08-31 10:49 ` Peter Zijlstra
2018-08-31 11:12 ` Will Deacon
2018-08-31 11:20 ` Peter Zijlstra
2018-08-31 11:50 ` Nicholas Piggin
2018-09-03 12:52 ` Will Deacon
2018-08-30 17:11 ` Peter Zijlstra
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