Re: [PATCH 00/23] arch: allow pte_offset_map[_lock]() to fail
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- To: Matthew Wilcox <willy@xxxxxxxxxxxxx>
- Subject: Re: [PATCH 00/23] arch: allow pte_offset_map[_lock]() to fail
- From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- Date: Tue, 16 May 2023 12:41:52 +0200
- Cc: Hugh Dickins <hughd@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Mike Kravetz <mike.kravetz@xxxxxxxxxx>, Mike Rapoport <rppt@xxxxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Suren Baghdasaryan <surenb@xxxxxxxxxx>, Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Catalin Marinas <catalin.marinas@xxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>, Greg Ungerer <gerg@xxxxxxxxxxxxxx>, Michal Simek <monstr@xxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, John David Anglin <dave.anglin@xxxxxxxx>, "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>, Michael Ellerman <mpe@xxxxxxxxxxxxxx>, Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>, Palmer Dabbelt <palmer@xxxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>, John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Chris Zankel <chris@xxxxxxxxxx>, Max Filippov <jcmvbkbc@xxxxxxxxx>, x86@xxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390@xxxxxxxxxxxxxxx, linux-sh@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, Michel Lespinasse <michel@xxxxxxxxxxxxxx>
- In-reply-to: <ZFz1j1slZHCQmwMJ@casper.infradead.org>
- References: <77a5d8c-406b-7068-4f17-23b7ac53bc83@google.com> <ZFs0k2rrLPH9A/UU@casper.infradead.org> <d7f3c7b2-25b8-ef66-98a8-43d68f4499f@google.com> <ZFz1j1slZHCQmwMJ@casper.infradead.org>
On Thu, May 11, 2023 at 03:02:55PM +0100, Matthew Wilcox wrote:
> We also talked about moving x86 to always RCU-free page tables in
> order to make accessing /proc/$pid/smaps lockless. I believe Michel
> is going to take a swing at this project.
Shouldn't be too controversial I think -- effectively everybody already
has it enabled because everybody builds with KVM enabled.
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