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Groups > linux.kernel > #1181773 > unrolled thread
| Started by | Frederic Weisbecker <fweisbec@gmail.com> |
|---|---|
| First post | 2015-07-10 19:20 +0200 |
| Last post | 2015-07-10 20:00 +0200 |
| Articles | 2 — 2 participants |
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Re: [PATCH 2/5] kmod: Use system_unbound_wq instead of khelper Frederic Weisbecker <fweisbec@gmail.com> - 2015-07-10 19:20 +0200
Re: [PATCH 2/5] kmod: Use system_unbound_wq instead of khelper Christoph Lameter <cl@linux.com> - 2015-07-10 20:00 +0200
| From | Frederic Weisbecker <fweisbec@gmail.com> |
|---|---|
| Date | 2015-07-10 19:20 +0200 |
| Subject | Re: [PATCH 2/5] kmod: Use system_unbound_wq instead of khelper |
| Message-ID | <pKK7U-mu-7@gated-at.bofh.it> |
On Fri, Jul 10, 2015 at 09:20:46AM -0500, Christoph Lameter wrote: > On Fri, 10 Jul 2015, Frederic Weisbecker wrote: > > > Now perhaps it is a good thing in the end. At least in nohz full it > > doesn't change anything as we affine that workqueue too. But we must > > be sure that a single NUMA node is enough to handle typical loads of > > usermodehelper. > > This is configurable right? So if you screw up you are responsible. No it's not much configurable. The works are scheduled on tasks that are node affine and you can't change that for system_unbound_wq. Only WQ_SYSFS workqueues can be overriden on their no_numa property but even there that's after the boot and most of the usermodehelper load goes on boot. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Christoph Lameter <cl@linux.com> |
|---|---|
| Date | 2015-07-10 20:00 +0200 |
| Message-ID | <pKKKD-A5-29@gated-at.bofh.it> |
| In reply to | #1181773 |
On Fri, 10 Jul 2015, Frederic Weisbecker wrote: > No it's not much configurable. The works are scheduled on tasks that are > node affine and you can't change that for system_unbound_wq. Only WQ_SYSFS > workqueues can be overriden on their no_numa property but even there that's > after the boot and most of the usermodehelper load goes on boot. Well then lets have at least one thread per NUMA node so that NUMA affinity works? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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