Date: Fri, 1 Apr 2016 08:12:50 +0200 From: Mateusz Guzik <mjg@freebsd.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r297481 - head/sys/kern Message-ID: <20160401061250.GA24248@dft-labs.eu>
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Author: mjg Date: Wed Apr 1 08:10:00 2016 New Revision: 280963 URL: https://svnweb.freebsd.org/changeset/base/297481 Log: Increase responsiveness under load by being more aggressive with priority changes. MFC after: 1 week Modified: head/sys/kern/sched_ule.c Modified: head/sys/kern/sched_ule.c =================================================================== --- sys/kern/sched_ule.c (revision 297480) +++ sys/kern/sched_ule.c (working copy) @@ -1696,15 +1696,10 @@ } ts = td->td_sched; THREAD_LOCK_ASSERT(td, MA_OWNED); - if (td->td_priority == prio) - return; /* - * If the priority has been elevated due to priority - * propagation, we may have to move ourselves to a new - * queue. This could be optimized to not re-add in some - * cases. + * DOES THIS WORK LOL */ - if (TD_ON_RUNQ(td) && prio < td->td_priority) { + if (TD_ON_RUNQ(td) && prio != td->td_priority) { sched_rem(td); td->td_priority = prio; sched_add(td, SRQ_BORROWING);
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