From: Peter Zijlstra <peterz@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nathan Chancellor <nathan@kernel.org>,
Uros Bizjak <ubizjak@gmail.com>,
x86@kernel.org, willy@infradead.org, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
aarcange@redhat.com, kirill.shutemov@linux.intel.com,
jroedel@suse.de
Subject: Re: [PATCH 11/13] x86_64: Remove pointless set_64bit() usage
Date: Mon, 19 Dec 2022 16:44:33 +0100 [thread overview]
Message-ID: <Y6CG4e6JteXc8ih5@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <CAHk-=wggJFQJmWtvsFVt69hzRXW3zD5+9q-1Laz=NoZQ8Fy9Ag@mail.gmail.com>
On Fri, Nov 04, 2022 at 10:15:08AM -0700, Linus Torvalds wrote:
> On Fri, Nov 4, 2022 at 9:01 AM Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > So cmpxchg_double() does a cmpxchg on a double long value and is
> > currently supported by: i386, x86_64, arm64 and s390.
> >
> > On all those, except i386, two longs are u128.
> >
> > So how about we introduce u128 and cmpxchg128 -- then it directly
> > mirrors the u64 and cmpxchg64 usage we already have. It then also
> > naturally imposses the alignment thing.
>
> Ack
Out now: https://lkml.kernel.org/r/20221219153525.632521981@infradead.org
next prev parent reply other threads:[~2022-12-19 15:47 UTC|newest]
Thread overview: 148+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-22 11:14 [PATCH 00/13] Clean up pmd_get_atomic() and i386-PAE Peter Zijlstra
2022-10-22 11:14 ` [PATCH 01/13] mm: Update ptep_get_lockless()s comment Peter Zijlstra
2022-10-24 5:42 ` John Hubbard
2022-10-24 8:00 ` Peter Zijlstra
2022-10-24 19:58 ` Jann Horn
2022-10-24 20:19 ` Linus Torvalds
2022-10-24 20:23 ` Jann Horn
2022-10-24 20:36 ` Linus Torvalds
2022-10-25 3:21 ` Matthew Wilcox
2022-10-25 7:54 ` Alistair Popple
2022-10-25 13:33 ` Peter Zijlstra
2022-10-25 13:44 ` Jann Horn
2022-10-26 0:45 ` Alistair Popple
2022-10-25 14:02 ` Peter Zijlstra
2022-10-25 14:18 ` Jann Horn
2022-10-25 15:06 ` Peter Zijlstra
2022-10-26 16:45 ` Jann Horn
2022-10-27 7:08 ` Peter Zijlstra
2022-10-27 18:13 ` Linus Torvalds
2022-10-27 19:35 ` Peter Zijlstra
2022-10-27 19:43 ` Linus Torvalds
2022-10-27 20:15 ` Nadav Amit
2022-10-27 20:31 ` Linus Torvalds
2022-10-27 21:44 ` Nadav Amit
2022-10-28 23:57 ` Nadav Amit
2022-10-29 0:42 ` Linus Torvalds
2022-10-29 18:05 ` Nadav Amit
2022-10-29 18:36 ` Linus Torvalds
2022-10-29 18:58 ` Linus Torvalds
2022-10-29 19:14 ` Linus Torvalds
2022-10-29 19:28 ` Nadav Amit
2022-10-30 0:18 ` Nadav Amit
2022-10-30 2:17 ` Nadav Amit
2022-10-30 18:19 ` Linus Torvalds
2022-10-30 18:51 ` Linus Torvalds
2022-10-30 22:47 ` Linus Torvalds
2022-10-31 1:47 ` Linus Torvalds
2022-10-31 4:09 ` Nadav Amit
2022-10-31 4:55 ` Nadav Amit
2022-10-31 5:00 ` Linus Torvalds
2022-10-31 15:43 ` Nadav Amit
2022-10-31 17:32 ` Linus Torvalds
2022-10-31 9:36 ` Peter Zijlstra
2022-10-31 17:28 ` Linus Torvalds
2022-10-31 18:43 ` mm: delay rmap removal until after TLB flush Linus Torvalds
2022-11-02 9:14 ` Christian Borntraeger
2022-11-02 9:23 ` Christian Borntraeger
2022-11-02 17:55 ` Linus Torvalds
2022-11-02 18:28 ` Linus Torvalds
2022-11-02 22:29 ` Gerald Schaefer
2022-11-02 12:45 ` Peter Zijlstra
2022-11-02 22:31 ` Gerald Schaefer
2022-11-02 23:13 ` Linus Torvalds
2022-11-03 9:52 ` David Hildenbrand
2022-11-03 16:54 ` Linus Torvalds
2022-11-03 17:09 ` Linus Torvalds
2022-11-03 17:36 ` David Hildenbrand
2022-11-04 6:33 ` Alexander Gordeev
2022-11-04 17:35 ` Linus Torvalds
2022-11-06 21:06 ` Hugh Dickins
2022-11-06 22:34 ` Linus Torvalds
2022-11-06 23:14 ` Andrew Morton
2022-11-07 0:06 ` Stephen Rothwell
2022-11-07 16:19 ` Linus Torvalds
2022-11-07 23:02 ` Andrew Morton
2022-11-07 23:44 ` Stephen Rothwell
2022-11-07 9:12 ` Peter Zijlstra
2022-11-07 20:07 ` Johannes Weiner
2022-11-07 20:29 ` Linus Torvalds
2022-11-07 23:47 ` Linus Torvalds
2022-11-08 4:28 ` Linus Torvalds
2022-11-08 19:56 ` Linus Torvalds
2022-11-08 20:03 ` Konstantin Ryabitsev
2022-11-08 20:18 ` Linus Torvalds
2022-11-08 19:41 ` [PATCH 1/4] mm: introduce 'encoded' page pointers with embedded extra bits Linus Torvalds
2022-11-08 20:37 ` Nadav Amit
2022-11-08 20:46 ` Linus Torvalds
2022-11-09 6:36 ` Alexander Gordeev
2022-11-09 18:00 ` Linus Torvalds
2022-11-09 20:02 ` Linus Torvalds
2022-11-08 19:41 ` [PATCH 2/4] mm: teach release_pages() to take an array of encoded page pointers too Linus Torvalds
2022-11-08 19:41 ` [PATCH 3/4] mm: mmu_gather: prepare to gather encoded page pointers with flags Linus Torvalds
2022-11-08 19:41 ` [PATCH 4/4] mm: delay page_remove_rmap() until after the TLB has been flushed Linus Torvalds
2022-11-08 20:48 ` [lkp] [+115 bytes kernel size regression] [i386-tinyconfig] [0309f16088] " kernel test robot
2022-11-08 21:01 ` Linus Torvalds
2022-11-08 21:05 ` [PATCH 4/4] " Nadav Amit
2022-11-09 15:53 ` Johannes Weiner
2022-11-09 19:31 ` Hugh Dickins
2022-10-31 9:39 ` [PATCH 01/13] mm: Update ptep_get_lockless()s comment Peter Zijlstra
2022-10-31 17:22 ` Linus Torvalds
2022-10-31 9:46 ` Peter Zijlstra
2022-10-31 9:28 ` Peter Zijlstra
2022-10-31 17:19 ` Linus Torvalds
2022-10-30 19:34 ` Nadav Amit
2022-10-29 19:39 ` John Hubbard
2022-10-29 20:15 ` Linus Torvalds
2022-10-29 20:30 ` Linus Torvalds
2022-10-29 20:42 ` John Hubbard
2022-10-29 20:56 ` Nadav Amit
2022-10-29 21:03 ` Nadav Amit
2022-10-29 21:12 ` Linus Torvalds
2022-10-29 20:59 ` Theodore Ts'o
2022-10-26 19:43 ` Nadav Amit
2022-10-27 7:27 ` Peter Zijlstra
2022-10-27 17:30 ` Nadav Amit
2022-10-22 11:14 ` [PATCH 02/13] x86/mm/pae: Make pmd_t similar to pte_t Peter Zijlstra
2022-10-22 11:14 ` [PATCH 03/13] sh/mm: " Peter Zijlstra
2022-12-21 13:54 ` Guenter Roeck
2022-10-22 11:14 ` [PATCH 04/13] mm: Fix pmd_read_atomic() Peter Zijlstra
2022-10-22 17:30 ` Linus Torvalds
2022-10-24 8:09 ` Peter Zijlstra
2022-11-01 12:41 ` Peter Zijlstra
2022-11-01 17:42 ` Linus Torvalds
2022-11-02 9:12 ` [tip: x86/mm] mm: Convert __HAVE_ARCH_P..P_GET to the new style tip-bot2 for Peter Zijlstra
2022-11-03 21:15 ` tip-bot2 for Peter Zijlstra
2022-12-17 18:55 ` tip-bot2 for Peter Zijlstra
2022-10-22 11:14 ` [PATCH 05/13] mm: Rename GUP_GET_PTE_LOW_HIGH Peter Zijlstra
2022-10-22 11:14 ` [PATCH 06/13] mm: Rename pmd_read_atomic() Peter Zijlstra
2022-10-22 11:14 ` [PATCH 07/13] mm/gup: Fix the lockless PMD access Peter Zijlstra
2022-10-23 0:42 ` Hugh Dickins
2022-10-24 7:42 ` Peter Zijlstra
2022-10-25 3:58 ` Hugh Dickins
2022-10-22 11:14 ` [PATCH 08/13] x86/mm/pae: Dont (ab)use atomic64 Peter Zijlstra
2022-10-22 11:14 ` [PATCH 09/13] x86/mm/pae: Use WRITE_ONCE() Peter Zijlstra
2022-10-22 17:42 ` Linus Torvalds
2022-10-24 10:21 ` Peter Zijlstra
2022-10-22 11:14 ` [PATCH 10/13] x86/mm/pae: Be consistent with pXXp_get_and_clear() Peter Zijlstra
2022-10-22 17:53 ` Linus Torvalds
2022-10-24 11:13 ` Peter Zijlstra
2022-10-22 11:14 ` [PATCH 11/13] x86_64: Remove pointless set_64bit() usage Peter Zijlstra
2022-10-22 17:55 ` Linus Torvalds
2022-11-03 19:09 ` Nathan Chancellor
2022-11-03 19:23 ` Uros Bizjak
2022-11-03 19:35 ` Nathan Chancellor
2022-11-03 20:39 ` Linus Torvalds
2022-11-03 21:06 ` Peter Zijlstra
2022-11-04 16:01 ` Peter Zijlstra
2022-11-04 17:15 ` Linus Torvalds
2022-11-05 13:29 ` Jason A. Donenfeld
2022-11-05 15:14 ` Peter Zijlstra
2022-11-05 20:54 ` Jason A. Donenfeld
2022-11-07 9:14 ` David Laight
2022-12-19 15:44 ` Peter Zijlstra [this message]
2022-10-22 11:14 ` [PATCH 12/13] x86/mm/pae: Get rid of set_64bit() Peter Zijlstra
2022-10-22 11:14 ` [PATCH 13/13] mm: Remove pointless barrier() after pmdp_get_lockless() Peter Zijlstra
2022-10-22 19:59 ` Yu Zhao
2022-10-22 17:57 ` [PATCH 00/13] Clean up pmd_get_atomic() and i386-PAE Linus Torvalds
2022-10-29 12:21 ` Peter Zijlstra
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