Revert 095bebf6 ("sched/numa: Do not move past the balance point if unbalanced")
Commit 095bebf6 ("sched/numa: Do not move past the balance point if unbalanced") broke convergence of workloads with just one runnable thread, by making it impossible for the one runnable thread on the system to move from one NUMA node to another. Instead, the thread would remain where it was, and pull all the memory across to its location, which is much slower than just migrating the thread to where the memory is. The next patch has a better fix for the issue that 095bebf6 tried to address. Reported-by:Jirka Hladky <jhladky@redhat.com> Signed-off-by:
Rik van Riel <riel@redhat.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: dedekind1@gmail.com Cc: mgorman@suse.de Link: http://lkml.kernel.org/r/1432753468-7785-2-git-send-email-riel@redhat.com Signed-off-by:
Ingo Molnar <mingo@kernel.org>
parent
54d27365
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