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[Bug runtime/20820] another "soft lockup" BUG on RHEL7 ppc64
- From: "jistone at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Thu, 01 Dec 2016 19:29:37 +0000
- Subject: [Bug runtime/20820] another "soft lockup" BUG on RHEL7 ppc64
- Auto-submitted: auto-generated
- References: <bug-20820-6586@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=20820
Josh Stone <jistone at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jistone at redhat dot com
--- Comment #14 from Josh Stone <jistone at redhat dot com> ---
Comment on attachment 9682
--> https://sourceware.org/bugzilla/attachment.cgi?id=9682
proposed __stp_init_time() patch
> - write_seqlock(&time->lock);
> + write_seqlock_irqsave(&time->lock, flags2);
> time->base_ns = ns;
> time->base_cycles = cycles;
> - write_sequnlock(&time->lock);
> + write_sequnlock_irqrestore(&time->lock, flags2);
>
> local_irq_restore(flags);
Why do you need to save irq if it's already in a local_irq_save section?
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