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| author | Tejun Heo <tj@kernel.org> | 2012-09-18 12:48:43 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-02 09:47:22 -0700 |
| commit | 3d45db6b5158a7f09f8be651577416ef6a4dcbd4 (patch) | |
| tree | 04082fd9bf0d0a955752cc485a0d7f2b48464ff6 /kernel/kthread.c | |
| parent | 896b6af471f67fc60cbab5a503cb8a764a8c47a4 (diff) | |
| download | kernel_samsung_smdk4412-3d45db6b5158a7f09f8be651577416ef6a4dcbd4.zip kernel_samsung_smdk4412-3d45db6b5158a7f09f8be651577416ef6a4dcbd4.tar.gz kernel_samsung_smdk4412-3d45db6b5158a7f09f8be651577416ef6a4dcbd4.tar.bz2 | |
workqueue: reimplement work_on_cpu() using system_wq
commit ed48ece27cd3d5ee0354c32bbaec0f3e1d4715c3 upstream.
The existing work_on_cpu() implementation is hugely inefficient. It
creates a new kthread, execute that single function and then let the
kthread die on each invocation.
Now that system_wq can handle concurrent executions, there's no
advantage of doing this. Reimplement work_on_cpu() using system_wq
which makes it simpler and way more efficient.
stable: While this isn't a fix in itself, it's needed to fix a
workqueue related bug in cpufreq/powernow-k8. AFAICS, this
shouldn't break other existing users.
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/kthread.c')
0 files changed, 0 insertions, 0 deletions