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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - CPU iowait higher when run the GPU multi decoding threads"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109830#c27">Comment # 27</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - CPU iowait higher when run the GPU multi decoding threads"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109830">bug 109830</a>
from <span class="vcard"><a class="email" href="mailto:owen.zhang@intel.com" title="Owen Zhang <owen.zhang@intel.com>"> <span class="fn">Owen Zhang</span></a>
</span></b>
<pre>Hi，
i have made the following changes on kernel 4.19:
1) apply the following patch:
<a href="https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.20.y&id=0a2fff2428f1e175932dc3cf115b68c868e3a839">https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.20.y&id=0a2fff2428f1e175932dc3cf115b68c868e3a839</a>
2) change the io_schedule_timeout to schedule_timeout.
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -1322,7 +1322,7 @@ long i915_request_wait(struct i915_request *rq,
break;
}
- timeout = io_schedule_timeout(timeout);
+ timeout = schedule_timeout(timeout);
}
the iowait value reduce to below 80%. so Is it possible to do one W/R to
customer temp deployment patch before the formal fix patch release?
any suggestions? thanks very much.</pre>
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