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| jtaylor | have there been scheduler changes in recent kernel updates? | 13:30 |
|---|---|---|
| jtaylor | I have schedule and sched_clock show up at 25% in all of my profiles | 13:30 |
| jtaylor | that wasn't the case a few weeks ago | 13:30 |
| jamieiles | Hi folks, the Ubuntu-3.13.0-113.160 tag isn't present in ubuntu-trusty.git, looks like it should be b5fea3e677cf9b2f85237eed1a6c56191384342d | 14:49 |
| apw | jamieiles, hmmm, looking | 14:54 |
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| jamieiles | apw: I see the tag now, thanks | 15:27 |
| apw | jamieiles, great ... | 15:28 |
| tseliot | apw, rtg: are we going to get a backport of this commit in xenial? It looks trivial, and I think it would make sense to have it: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=08b259631b5a1d912af4832847b5642f377d9101 | 16:15 |
| rtg | tseliot, is it relevant for a 4.4 kernel ? The commit says 4.9 | 16:16 |
| tseliot | rtg: the CPU is supported by 4.4, but then it crashes after a while, as reported here: https://www.servethehome.com/amd-ryzen-with-ubuntu-here-is-what-you-have-to-do-to-fix-constant-crashes/ | 16:19 |
| rtg | tseliot, their fix is to run a 4.10 kernel. | 16:22 |
| rtg | tseliot, we'll have a 4.10 based hwe-edge kernel in Xenial fairly soon | 16:23 |
| tseliot | rtg: right, but they mention the actual commit (with a link): "There have been numerous reports of SMT issues and it is a known fix that got rolled out in the Linux 4.10 and 4.11 kernels as we mentioned in our release piece. " | 16:23 |
| tseliot | rtg: when would that be? | 16:23 |
| rtg | tseliot, I hope to get it into proposed today. working with apw on that | 16:23 |
| tseliot | rtg: ok, cool | 16:24 |
| dmj_s76 | sforshee: I'll test out the -22 ucode when I get a chance | 17:06 |
| sforshee | dmj_s76: thanks! | 18:08 |
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| dmj_s76 | sforshee: I tested on one machine with an 8260 and it seems the new -22 ucode doesn't have the same problem. There could be regressions elsewhere, but at least on the machine I tested things were working fine. | 21:22 |
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