Messages in this thread | | | Date | Thu, 19 Nov 2020 07:30:39 +0800 | From | Tao Zhou <> | Subject | Re: [PATCH v3] sched/fair: fix unthrottle_cfs_rq for leaf_cfs_rq list |
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Hi Guilherme,
On Wed, Nov 18, 2020 at 07:56:38PM -0300, Guilherme G. Piccoli wrote: > Hi Vincent (and all CCed), I'm sorry to ping about such "old" patch, but > we experienced a similar condition to what this patch addresses; it's an > older kernel (4.15.x) but when suggesting the users to move to an > updated 5.4.x kernel, we noticed that this patch is not there, although > similar ones are (like [0] and [1]). > > So, I'd like to ask if there's any particular reason to not backport > this fix to stable kernels, specially the longterm 5.4. The main reason > behind the question is that the code is very complex for non-experienced > scheduler developers, and I'm afraid in suggesting such backport to 5.4 > and introduce complex-to-debug issues. > > Let me know your thoughts Vincent (and all CCed), thanks in advance. > Cheers, > > > Guilherme > > > P.S. For those that deleted this thread from the email client, here's a > link: > https://lore.kernel.org/lkml/20200513135528.4742-1-vincent.guittot@linaro.org/ > > > [0] > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fe61468b2cb > > [1] > https://lore.kernel.org/lkml/20200506141821.GA9773@lorien.usersys.redhat.com/ > <- great thread BTW!
Backport this patch to 5.4 need runnable_avg. but it is not introduced in 5.4 that time(please correct me if I am wrong).
Thanks, Tao
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