Petr Mladek
2023-Jan-26 17:03 UTC
[PATCH 0/2] vhost: improve livepatch switching for heavily loaded vhost worker kthreads
On Fri 2023-01-20 16:12:20, Seth Forshee (DigitalOcean) wrote:> We've fairly regularaly seen liveptches which cannot transition within kpatch's > timeout period due to busy vhost worker kthreads.I have missed this detail. Miroslav told me that we have solved something similar some time ago, see https://lore.kernel.org/all/20220507174628.2086373-1-song at kernel.org/ Honestly, kpatch's timeout 1 minute looks incredible low to me. Note that the transition is tried only once per minute. It means that there are "only" 60 attempts. Just by chance, does it help you to increase the timeout, please? This low timeout might be useful for testing. But in practice, it does not matter when the transition is lasting one hour or even longer. It takes much longer time to prepare the livepatch. Best Regards, Petr
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