Liam R. Howlett 0c387104c2 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 17:02:57 +02:00
..
accounting	tools/accounting/procacct: remove some unused variables	2022-11-18 13:55:09 -08:00
arch	tools headers arm64: Sync arm64's cputype.h with the kernel sources	2023-01-18 10:07:42 -03:00
bootconfig	bootconfig: Fix testcase to increase max node	2023-03-30 12:50:57 +02:00
bpf	bpftool: Always disable stack protection for BPF objects	2023-03-10 09:29:08 +01:00
build
certs
cgroup
counter
debugging
edid
firewire
firmware
gpio	tools: gpio: fix -c option of gpio-event-mon	2023-01-27 14:05:46 +01:00
hv
iio	tools/iio/iio_utils:fix memory leak	2023-03-11 13:50:40 +01:00
include	tools headers: Syncronize linux/build_bug.h with the kernel sources	2023-01-18 10:31:11 -03:00
io_uring
kvm/kvm_stat	tools/kvm_stat: update exit reasons for vmx/svm/aarch64/userspace	2022-11-09 12:26:52 -05:00
laptop
leds
lib	libbpf: Fix btf_dump's packed struct determination	2023-04-06 12:12:48 +02:00
memory-model
objtool	objtool: Fix memory leak in create_static_call_sections()	2023-03-11 13:50:21 +01:00
pci
pcmcia
perf	perf stat: Fix counting when initial delay configured	2023-03-17 08:57:53 +01:00
power	tools/power turbostat: fix decoding of HWP_STATUS	2023-04-06 12:12:30 +02:00
rcu
scripts
spi
testing	maple_tree: remove GFP_ZERO from kmem_cache_alloc() and kmem_cache_alloc_bulk()	2023-04-13 17:02:57 +02:00
thermal
time
tracing	tools/tracing/rtla: osnoise_hist: use total duration for average calculation	2023-03-10 09:28:43 +01:00
usb	tools: usb: ffs-aio-example: Fix build error with aarch64-*-gnu-gcc toolchain(s)	2022-11-09 12:37:56 +01:00
verification	Tracing fix for 6.2:	2022-12-21 19:03:42 -08:00
virtio	tools/virtio: fix the vringh test for virtio ring changes	2023-01-27 06:18:41 -05:00
vm	MM patches for 6.2-rc1.	2022-12-13 19:29:45 -08:00
wmi
Makefile