Liam R. Howlett edc5a4e880 maple_tree: remove GFP_ZERO from kmem_cache_alloc() and kmem_cache_alloc_bulk() ... commit 541e06b772 upstream. Preallocations are common in the VMA code to avoid allocating under certain locking conditions. The preallocations must also cover the worst-case scenario. Removing the GFP_ZERO flag from the kmem_cache_alloc() (and bulk variant) calls will reduce the amount of time spent zeroing memory that may not be used. Only zero out the necessary area to keep track of the allocations in the maple state. Zero the entire node prior to using it in the tree. This required internal changes to node counting on allocation, so the test code is also updated. This restores some micro-benchmark performance: up to +9% in mmtests mmap1 by my testing +10% to +20% in mmap, mmapaddr, mmapmany tests reported by Red Hat Link: https://bugzilla.redhat.com/show_bug.cgi?id=2149636 Link: https://lkml.kernel.org/r/20230105160427.2988454-1-Liam.Howlett@oracle.com Cc: stable@vger.kernel.org Fixes: 54a611b605 ("Maple Tree: add new data structure") Signed-off-by: Liam Howlett <Liam.Howlett@oracle.com> Reported-by: Jirka Hladky <jhladky@redhat.com> Suggested-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-04-13 16:55:38 +02:00
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crypto/chacha20-s390	tools/testing/crypto: Use vzalloc instead of vmalloc+memset	2022-07-05 14:46:36 +02:00
cxl	tools/testing/cxl: Add a single-port host-bridge regression config	2022-11-04 16:01:24 -07:00
fault-injection	…
ktest	ktest.pl: Add RUN_TIMEOUT option with default unlimited	2023-03-10 09:34:27 +01:00
kunit	kunit: tool: Don't download risc-v opensbi firmware with wget	2022-10-07 10:16:28 -06:00
memblock	Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."	2023-02-22 12:59:50 +01:00
nvdimm	ndtest: Cleanup all of blk namespace specific code	2022-07-12 17:57:55 -07:00
radix-tree	maple_tree: remove GFP_ZERO from kmem_cache_alloc() and kmem_cache_alloc_bulk()	2023-04-13 16:55:38 +02:00
scatterlist	…
selftests	libbpf: Fix btf_dump's packed struct determination	2023-04-06 12:10:58 +02:00
vsock	vsock_test: POLLIN + SO_RCVLOWAT test	2022-08-23 10:43:12 +02:00