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| author |   Bruce Ashfield <bruce.ashfield@gmail.com> | 2019-10-08 10:26:29 -0400 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2019-10-08 20:47:52 +0100 |
| commit | 55a54aed27ffa94a235da526a39aeea59caa3417 (patch) | |
| tree | 655fe22d3109b7d642e7ba232b5b61785dd642e8 /meta/recipes-kernel/linux/linux-yocto-tiny_5.2.bb | |
| parent | aba70cbbc1ef6139aad862160427eb70faafda84 (diff) | |
| download | openembedded-core-contrib-55a54aed27ffa94a235da526a39aeea59caa3417.tar.gz | |
linux-yocto/5.2: fix strace/ptrace long runtime issues
Bumping SRCREVs to pickup the following kernel commit:
[
Author: Bruce Ashfield <bruce.ashfield@gmail.com>
Date: Tue Oct 8 13:15:46 2019 +0000
signal/ptrace: fix cgroup2/freezer long runtimes
As reported in the thread: https://lkml.org/lkml/2019/10/1/789, in
kernels with commit 76f969e8948d82 [cgroup: cgroup v2 freezer], we
were seeing much longer runtime in strace/ptrace tests (4 minutes
versus 4 seconds).
The issue only manifests if CONFIG_PREEMPT is enabled, which is in
all of the default configurations.
As sugggested in the thread, the movement of preempt_enable_no_resched()
until after the cgroup is frozen returns the behaviour to pre-5.2
runtimes.
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
]
With this change in place, our times are back to normal:
root@qemux86-64:~# cd /usr/lib/strace/ptest/tests
root@qemux86-64:/usr/lib/strace/ptest/tests# time ../strace -o log -qq -esignal=none -e/clock ./printpath-umovestr>ttt
real 0m3.909s
user 0m0.534s
sys 0m3.342s
This will eventually loop around via -stable, or may need future
tweaks, but it does address the immediate issue/symptom that we are
seeing, with no obvious side effects.
[YOCTO #13556]
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/recipes-kernel/linux/linux-yocto-tiny_5.2.bb')
| -rw-r--r-- | meta/recipes-kernel/linux/linux-yocto-tiny_5.2.bb | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/meta/recipes-kernel/linux/linux-yocto-tiny_5.2.bb b/meta/recipes-kernel/linux/linux-yocto-tiny_5.2.bb index e6eb78198c..f3f546866b 100644 --- a/meta/recipes-kernel/linux/linux-yocto-tiny_5.2.bb +++ b/meta/recipes-kernel/linux/linux-yocto-tiny_5.2.bb @@ -15,9 +15,9 @@ DEPENDS += "openssl-native util-linux-native" KMETA = "kernel-meta" KCONF_BSP_AUDIT_LEVEL = "2" -SRCREV_machine_qemuarm ?= "e31887832108a1dfac19601459a84a2fa38207f7" -SRCREV_machine ?= "25b14cdf9659c68ab32d66616dfdbbe2ece3fd94" -SRCREV_meta ?= "56f5bc749e5a8e40b55a3819288ac277813ec5ef" +SRCREV_machine_qemuarm ?= "aaa66d462ec17345dadd69b1ec0f3fcc83e82536" +SRCREV_machine ?= "255a750d28cd45df8923c3aba1e82c322757a50d" +SRCREV_meta ?= "b867b78b5019ae455af97dec7794cff7527d7624" PV = "${LINUX_VERSION}+git${SRCPV}" |