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6ce711f275
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Matthew Wilcox 6ce711f275 idr: Make 1-based IDRs more efficient 
About 20% of the IDR users in the kernel want the allocated IDs to start
at 1.  The implementation currently searches all the way down the left
hand side of the tree, finds no free ID other than ID 0, walks all the
way back up, and then all the way down again.  This patch 'rebases' the
ID so we fill the entire radix tree, rather than leave a gap at 0.

Chris Wilson says: "I did the quick hack of allocating index 0 of the
idr and that eradicated idr_get_free() from being at the top of the
profiles for the many-object stress tests. This improvement will be
much appreciated."

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
2018-02-06 16:41:29 -05:00
..
accounting License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
arch tools include arch: Grab a copy of errno.h for arch's supported by perf 2018-01-23 09:51:37 -03:00
bpf bpftool: recognize BPF_MAP_TYPE_CPUMAP maps 2018-01-19 23:16:52 +01:00
build Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
cgroup License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
firewire License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gpio tools/gpio: Fix build error with musl libc 2017-12-21 13:51:01 +01:00
hv Merge 4.15-rc3 into char-misc-next 2017-12-11 08:47:41 +01:00
iio License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
include Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
kvm/kvm_stat tools/kvm_stat: sort '-f help' output 2017-12-21 13:03:32 +01:00
laptop License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
leds License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-01-31 14:31:10 -08:00
nfsd License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
objtool Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-02-04 11:45:55 -08:00
pci License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pcmcia License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
perf perf trace beauty flock: Move to separate object file 2018-01-25 06:37:31 -03:00
power ACPI updates for v4.16-rc1 2018-01-29 10:17:53 -08:00
scripts tools: bpftool: create "uninstall", "doc-uninstall" make targets 2017-12-08 20:14:16 +01:00
spi License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
testing idr: Make 1-based IDRs more efficient 2018-02-06 16:41:29 -05:00
thermal/tmon Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2017-11-17 14:31:27 -08:00
time
usb usbip: list: don't list devices attached to vhci_hcd 2018-01-22 15:34:37 +01:00
virtio tools/virtio: fix smp_mb on x86 2018-01-29 12:02:55 -05:00
vm tools, vm: new option to specify kpageflags file 2018-01-31 17:18:40 -08:00
wmi tools/wmi: add a sample for dell smbios communication over WMI 2017-11-03 16:34:00 -07:00
Makefile platform-drivers-x86 for v4.15-1 2017-11-18 10:26:57 -08:00