diff options
author | Bruce Ashfield <bruce.ashfield@gmail.com> | 2019-10-08 10:26:29 -0400 |
---|---|---|
committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2019-10-09 14:07:43 +0100 |
commit | cdb9ea2a8b74d6675bd1af31835995a8f983bbf3 (patch) | |
tree | 3db57616e9a031776fdb40b498879e6ed4a69dc4 /meta/recipes-kernel/linux/linux-yocto-rt_5.2.bb | |
parent | 48cdc47f33bf761d320896061558ffbd29d3e076 (diff) | |
download | poky-cdb9ea2a8b74d6675bd1af31835995a8f983bbf3.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]
(From OE-Core rev: 55a54aed27ffa94a235da526a39aeea59caa3417)
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-rt_5.2.bb')
-rw-r--r-- | meta/recipes-kernel/linux/linux-yocto-rt_5.2.bb | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_5.2.bb b/meta/recipes-kernel/linux/linux-yocto-rt_5.2.bb index acae24edb1..e3fe54441f 100644 --- a/meta/recipes-kernel/linux/linux-yocto-rt_5.2.bb +++ b/meta/recipes-kernel/linux/linux-yocto-rt_5.2.bb | |||
@@ -11,8 +11,8 @@ python () { | |||
11 | raise bb.parse.SkipRecipe("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it") | 11 | raise bb.parse.SkipRecipe("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it") |
12 | } | 12 | } |
13 | 13 | ||
14 | SRCREV_machine ?= "90a5890111ca601af1cfba50939d4003fa8d9ce8" | 14 | SRCREV_machine ?= "0a9f6ee2443b54c614107728ca76485916010023" |
15 | SRCREV_meta ?= "56f5bc749e5a8e40b55a3819288ac277813ec5ef" | 15 | SRCREV_meta ?= "b867b78b5019ae455af97dec7794cff7527d7624" |
16 | 16 | ||
17 | SRC_URI = "git://git.yoctoproject.org/linux-yocto.git;branch=${KBRANCH};name=machine \ | 17 | SRC_URI = "git://git.yoctoproject.org/linux-yocto.git;branch=${KBRANCH};name=machine \ |
18 | git://git.yoctoproject.org/yocto-kernel-cache;type=kmeta;name=meta;branch=yocto-5.2;destsuffix=${KMETA}" | 18 | git://git.yoctoproject.org/yocto-kernel-cache;type=kmeta;name=meta;branch=yocto-5.2;destsuffix=${KMETA}" |