Yang Shi acf05d61d3 powerpc/64s/radix: don't need to broadcast IPI for radix pmd collapse flush ...

commit bedf03416913d88c796288f9dca109a53608c745 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-10-15 07:55:51 +02:00

..

book3s32

powerpc/32s: Fix kasan_init_region() for KASAN

2022-02-01 17:25:42 +01:00

book3s64

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

2022-10-15 07:55:51 +02:00

kasan

powerpc/kasan: Fix early region not updated correctly

2022-04-08 14:40:36 +02:00

nohash

powerpc/book3e: Fix PUD allocation size in map_kernel_page()

2022-07-07 17:52:15 +02:00

ptdump

powerpc/ptdump: Fix display of RW pages on FSL_BOOK3E

2022-08-21 15:15:26 +02:00

copro_fault.c

mm: clean up the last pieces of page fault accountings

2020-08-12 10:58:04 -07:00

dma-noncoherent.c

dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h>

2020-10-06 07:07:06 +02:00

drmem.c

pseries/drmem: don't cache node id in drmem_lmb struct

2020-09-02 11:00:21 +10:00

fault.c

powerpc/mm: Fix lockup on kernel exec fault

2021-07-19 09:44:56 +02:00

highmem.c

arch/kunmap_atomic: consolidate duplicate code

2020-06-04 19:06:22 -07:00

hugetlbpage.c

powerpc/8xx: Support 16k hugepages with 4k pages

2020-09-15 22:13:31 +10:00

init_32.c

Merge branch 'akpm' (patches from Andrew)

2020-08-07 11:39:33 -07:00

init_64.c

Merge branch 'fixes' into next

2020-09-14 22:57:18 +10:00

init-common.c

mm: reorder includes after introduction of linux/pgtable.h

2020-06-09 09:39:13 -07:00

ioremap_32.c

powerpc/ioremap: warn on early use of ioremap()

2019-11-19 19:38:38 +11:00

ioremap_64.c

powerpc: remove __ioremap_at and __iounmap_at

2020-06-02 10:59:10 -07:00

ioremap.c

mm/memremap_pages: Introduce memremap_compat_align()

2020-02-20 16:58:55 -08:00

maccess.c

powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()

2020-12-08 10:22:09 +11:00

Makefile

powerpc/mm: Fix KUAP warning by providing copy_from_kernel_nofault_allowed()

2020-12-08 10:22:09 +11:00

mem.c

powerpc/ftrace: Remove ftrace init tramp once kernel init is complete

2022-07-02 16:39:25 +02:00

mmap.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156

2019-05-30 11:26:35 -07:00

mmu_context.c

powerpc/mm: Switch obsolete dssall to .long

2022-06-14 18:32:46 +02:00

mmu_decl.h

powerpc/8xx: Don't set IMMR map anymore at boot

2020-05-26 22:22:21 +10:00

numa.c

powerpc/mm/numa: skip NUMA_NO_NODE onlining in parse_numa_properties()

2022-04-08 14:40:19 +02:00

pgtable_32.c

arch, drivers: replace for_each_membock() with for_each_mem_range()

2020-10-13 18:38:35 -07:00

pgtable_64.c

powerpc/64s/radix: Fix huge vmap false positive

2022-01-27 10:54:26 +01:00

pgtable-frag.c

powerpc/mm/radix: Fix PTE/PMD fragment count for early page table mappings

2020-07-20 22:57:56 +10:00

pgtable.c

powerpc/fixmap: Fix VM debug warning on unmap

2022-02-16 12:54:19 +01:00

slice.c

powerpc: Replace _ALIGN_UP() by ALIGN()

2020-05-11 23:15:15 +10:00