Messages in this thread | | | Subject | Re: Udpated sys_membarrier() speedup patch, FYI | From | Avi Kivity <> | Date | Mon, 31 Jul 2017 11:53:59 +0300 |
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On 07/31/2017 11:37 AM, Peter Zijlstra wrote: > On Mon, Jul 31, 2017 at 09:03:09AM +0300, Avi Kivity wrote: >> I remembered that current->mm does not change when switching to a kernel >> task, but my Kernlish is very rusty, or maybe it has changed. > kernel threads do indeed preserve the mm of the old userspace task, but > we track that in ->active_mm. Their ->mm will be NULL.
Gah, I'm so rusty, if I were any rustier I'd be doing bitcoin.
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