Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge tag 'cgroup-for-6.0-rc2-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup
Pull another cgroup fix from Tejun Heo:
"Commit 4f7e7236435c ("cgroup: Fix threadgroup_rwsem <->
cpus_read_lock() deadlock") required the cgroup
core to grab cpus_read_lock() before invoking ->attach().
Unfortunately, it missed adding cpus_read_lock() in
cgroup_attach_task_all(). Fix it"
* tag 'cgroup-for-6.0-rc2-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()
+2
+2
kernel/cgroup/cgroup-v1.c
+2
kernel/cgroup/cgroup-v1.c
···
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int retval = 0;
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mutex_lock(&cgroup_mutex);
62
+
cpus_read_lock();
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percpu_down_write(&cgroup_threadgroup_rwsem);
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64
for_each_root(root) {
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struct cgroup *from_cgrp;
···
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break;
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}
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74
percpu_up_write(&cgroup_threadgroup_rwsem);
75
+
cpus_read_unlock();
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mutex_unlock(&cgroup_mutex);
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return retval;