** Description changed: Basically, this issue: https://bugzilla.kernel.org/show_bug.cgi?id=198197 - ..is affecting a cloud provider on a 4.15 kernel. Customer testing with a kernel that is patched with the fix (upstream: - 512ac999d2755d2b7109e996a76b6fb8b888631d ) confirms that it resolves the + de53fd7aedb100f03e5d2231cfce0e4993282425 ) confirms that it resolves the issue. More details in: https://canonical.my.salesforce.com/5003z00001yUmC1 This bug is for SRU patch-tracking only.
** Description changed: Basically, this issue: https://bugzilla.kernel.org/show_bug.cgi?id=198197 ..is affecting a cloud provider on a 4.15 kernel. Customer testing with a kernel that is patched with the fix (upstream: de53fd7aedb100f03e5d2231cfce0e4993282425 ) confirms that it resolves the issue. More details in: https://canonical.my.salesforce.com/5003z00001yUmC1 This bug is for SRU patch-tracking only. + + + [Impact] + + * Aggressive throttling by CFS causes severe performance degradation in + some cases. + + [Test Case] + + * This reproducer clearly shows the problem before the fix and shows no problem after the fix: + https://gist.github.com/bobrik/2030ff040fad360327a5fab7a09c4ff1 + + [Regression Potential] + + * It touches core scheduler code so regression could be bad - but risk + is low as the patch is accepted in mainline and tested separately by + myself, the cloud provider, and at least 2 others. ** Description changed: Basically, this issue: https://bugzilla.kernel.org/show_bug.cgi?id=198197 ..is affecting a cloud provider on a 4.15 kernel. Customer testing with a kernel that is patched with the fix (upstream: de53fd7aedb100f03e5d2231cfce0e4993282425 ) confirms that it resolves the issue. - More details in: https://canonical.my.salesforce.com/5003z00001yUmC1 - - This bug is for SRU patch-tracking only. + More details in the SalesForce ticket: + https://canonical.my.salesforce.com/5003z00001yUmC1 [Impact] - * Aggressive throttling by CFS causes severe performance degradation in + * Aggressive throttling by CFS causes severe performance degradation in some cases. [Test Case] - * This reproducer clearly shows the problem before the fix and shows no problem after the fix: - https://gist.github.com/bobrik/2030ff040fad360327a5fab7a09c4ff1 + * This reproducer clearly shows the problem before the fix and shows no problem after the fix: + https://gist.github.com/bobrik/2030ff040fad360327a5fab7a09c4ff1 [Regression Potential] - * It touches core scheduler code so regression could be bad - but risk + * It touches core scheduler code so regression could be bad - but risk is low as the patch is accepted in mainline and tested separately by myself, the cloud provider, and at least 2 others. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1832151 Title: Unexpected CFS throttling Status in linux package in Ubuntu: Incomplete Status in linux source package in Bionic: In Progress Bug description: Basically, this issue: https://bugzilla.kernel.org/show_bug.cgi?id=198197 ..is affecting a cloud provider on a 4.15 kernel. Customer testing with a kernel that is patched with the fix (upstream: de53fd7aedb100f03e5d2231cfce0e4993282425 ) confirms that it resolves the issue. More details in the SalesForce ticket: https://canonical.my.salesforce.com/5003z00001yUmC1 [Impact] * Aggressive throttling by CFS causes severe performance degradation in some cases. [Test Case] * This reproducer clearly shows the problem before the fix and shows no problem after the fix: https://gist.github.com/bobrik/2030ff040fad360327a5fab7a09c4ff1 [Regression Potential] * It touches core scheduler code so regression could be bad - but risk is low as the patch is accepted in mainline and tested separately by myself, the cloud provider, and at least 2 others. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1832151/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
