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authorLinus Torvalds <torvalds@linux-foundation.org>2023-04-28 05:42:02 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-04-28 05:42:02 +0300
commit7fa8a8ee9400fe8ec188426e40e481717bc5e924 (patch)
treecc8fd6b4f936ec01e73238643757451e20478c07 /mm/Kconfig
parent91ec4b0d11fe115581ce2835300558802ce55e6c (diff)
parent4d4b6d66db63ceed399f1fb1a4b24081d2590eb1 (diff)
downloadlinux-7fa8a8ee9400fe8ec188426e40e481717bc5e924.tar.xz
Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton: - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of switching from a user process to a kernel thread. - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav. - zsmalloc performance improvements from Sergey Senozhatsky. - Yue Zhao has found and fixed some data race issues around the alteration of memcg userspace tunables. - VFS rationalizations from Christoph Hellwig: - removal of most of the callers of write_one_page() - make __filemap_get_folio()'s return value more useful - Luis Chamberlain has changed tmpfs so it no longer requires swap backing. Use `mount -o noswap'. - Qi Zheng has made the slab shrinkers operate locklessly, providing some scalability benefits. - Keith Busch has improved dmapool's performance, making part of its operations O(1) rather than O(n). - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd, permitting userspace to wr-protect anon memory unpopulated ptes. - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather than exclusive, and has fixed a bunch of errors which were caused by its unintuitive meaning. - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature, which causes minor faults to install a write-protected pte. - Vlastimil Babka has done some maintenance work on vma_merge(): cleanups to the kernel code and improvements to our userspace test harness. - Cleanups to do_fault_around() by Lorenzo Stoakes. - Mike Rapoport has moved a lot of initialization code out of various mm/ files and into mm/mm_init.c. - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for DRM, but DRM doesn't use it any more. - Lorenzo has also coverted read_kcore() and vread() to use iterators and has thereby removed the use of bounce buffers in some cases. - Lorenzo has also contributed further cleanups of vma_merge(). - Chaitanya Prakash provides some fixes to the mmap selftesting code. - Matthew Wilcox changes xfs and afs so they no longer take sleeping locks in ->map_page(), a step towards RCUification of pagefaults. - Suren Baghdasaryan has improved mmap_lock scalability by switching to per-VMA locking. - Frederic Weisbecker has reworked the percpu cache draining so that it no longer causes latency glitches on cpu isolated workloads. - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig logic. - Liu Shixin has changed zswap's initialization so we no longer waste a chunk of memory if zswap is not being used. - Yosry Ahmed has improved the performance of memcg statistics flushing. - David Stevens has fixed several issues involving khugepaged, userfaultfd and shmem. - Christoph Hellwig has provided some cleanup work to zram's IO-related code paths. - David Hildenbrand has fixed up some issues in the selftest code's testing of our pte state changing. - Pankaj Raghav has made page_endio() unneeded and has removed it. - Peter Xu contributed some rationalizations of the userfaultfd selftests. - Yosry Ahmed has fixed an issue around memcg's page recalim accounting. - Chaitanya Prakash has fixed some arm-related issues in the selftests/mm code. - Longlong Xia has improved the way in which KSM handles hwpoisoned pages. - Peter Xu fixes a few issues with uffd-wp at fork() time. - Stefan Roesch has changed KSM so that it may now be used on a per-process and per-cgroup basis. * tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm,unmap: avoid flushing TLB in batch if PTE is inaccessible shmem: restrict noswap option to initial user namespace mm/khugepaged: fix conflicting mods to collapse_file() sparse: remove unnecessary 0 values from rc mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area() hugetlb: pte_alloc_huge() to replace huge pte_alloc_map() maple_tree: fix allocation in mas_sparse_area() mm: do not increment pgfault stats when page fault handler retries zsmalloc: allow only one active pool compaction context selftests/mm: add new selftests for KSM mm: add new KSM process and sysfs knobs mm: add new api to enable ksm per process mm: shrinkers: fix debugfs file permissions mm: don't check VMA write permissions if the PTE/PMD indicates write permissions migrate_pages_batch: fix statistics for longterm pin retry userfaultfd: use helper function range_in_vma() lib/show_mem.c: use for_each_populated_zone() simplify code mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list() fs/buffer: convert create_page_buffers to folio_create_buffers fs/buffer: add folio_create_empty_buffers helper ...
Diffstat (limited to 'mm/Kconfig')
-rw-r--r--mm/Kconfig37
1 files changed, 32 insertions, 5 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 9c40844b7bc9..7672a22647b4 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -324,9 +324,9 @@ config SHUFFLE_PAGE_ALLOCATOR
the presence of a memory-side-cache. There are also incidental
security benefits as it reduces the predictability of page
allocations to compliment SLAB_FREELIST_RANDOM, but the
- default granularity of shuffling on the "MAX_ORDER - 1" i.e,
- 10th order of pages is selected based on cache utilization
- benefits on x86.
+ default granularity of shuffling on the MAX_ORDER i.e, 10th
+ order of pages is selected based on cache utilization benefits
+ on x86.
While the randomization improves cache utilization it may
negatively impact workloads on platforms without a cache. For
@@ -457,6 +457,12 @@ config SPARSEMEM_VMEMMAP
SPARSEMEM_VMEMMAP uses a virtually mapped memmap to optimise
pfn_to_page and page_to_pfn operations. This is the most
efficient option when sufficient kernel resources are available.
+#
+# Select this config option from the architecture Kconfig, if it is preferred
+# to enable the feature of HugeTLB/dev_dax vmemmap optimization.
+#
+config ARCH_WANT_OPTIMIZE_VMEMMAP
+ bool
config HAVE_MEMBLOCK_PHYS_MAP
bool
@@ -644,8 +650,8 @@ config HUGETLB_PAGE_SIZE_VARIABLE
HUGETLB_PAGE_ORDER when there are multiple HugeTLB page sizes available
on a platform.
- Note that the pageblock_order cannot exceed MAX_ORDER - 1 and will be
- clamped down to MAX_ORDER - 1.
+ Note that the pageblock_order cannot exceed MAX_ORDER and will be
+ clamped down to MAX_ORDER.
config CONTIG_ALLOC
def_bool (MEMORY_ISOLATION && COMPACTION) || CMA
@@ -1077,6 +1083,15 @@ comment "GUP_TEST needs to have DEBUG_FS enabled"
config GUP_GET_PXX_LOW_HIGH
bool
+config DMAPOOL_TEST
+ tristate "Enable a module to run time tests on dma_pool"
+ depends on HAS_DMA
+ help
+ Provides a test module that will allocate and free many blocks of
+ various sizes and report how long it takes. This is intended to
+ provide a consistent way to measure how changes to the
+ dma_pool_alloc/free routines affect performance.
+
config ARCH_HAS_PTE_SPECIAL
bool
@@ -1179,6 +1194,18 @@ config LRU_GEN_STATS
This option has a per-memcg and per-node memory overhead.
# }
+config ARCH_SUPPORTS_PER_VMA_LOCK
+ def_bool n
+
+config PER_VMA_LOCK
+ def_bool y
+ depends on ARCH_SUPPORTS_PER_VMA_LOCK && MMU && SMP
+ help
+ Allow per-vma locking during page fault handling.
+
+ This feature allows locking each virtual memory area separately when
+ handling page faults instead of taking mmap_lock.
+
source "mm/damon/Kconfig"
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