linux

iv/linux

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Yang Shi bedf034169 powerpc/64s/radix: don't need to broadcast IPI for radix pmd collapse flush

The IPI broadcast is used to serialize against fast-GUP, but fast-GUP will
move to use RCU instead of disabling local interrupts in fast-GUP.  Using
an IPI is the old-styled way of serializing against fast-GUP although it
still works as expected now.

And fast-GUP now fixed the potential race with THP collapse by checking
whether PMD is changed or not.  So IPI broadcast in radix pmd collapse
flush is not necessary anymore.  But it is still needed for hash TLB.

Link: https://lkml.kernel.org/r/20220907180144.555485-2-shy828301@gmail.com
Suggested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Yang Shi <shy828301@gmail.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2022-09-26 12:14:33 -07:00

alpha

provide arch_test_bit_acquire for architectures that define test_bit

2022-08-27 09:49:54 -07:00

arc

Kbuild updates for v5.20

2022-08-10 10:40:41 -07:00

arm

Merge 'irq/loongarch', 'pci/ctrl/loongson' and 'pci/header-cleanup-immutable'

2022-08-11 21:06:14 +08:00

arm64

arm64 fixes for -rc3