Messages in this thread | | | Date | Thu, 01 Dec 2016 07:47:50 -0500 | From | Prarit Bhargava <> | Subject | Re: Odd build breakage in 4.9-rc7 |
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On 11/30/2016 05:41 PM, Nicolas Pitre wrote: > On Wed, 30 Nov 2016, Linus Torvalds wrote: > >> On Wed, Nov 30, 2016 at 10:50 AM, Prarit Bhargava <prarit@redhat.com> wrote: >>> >>> It comes back. The steps to reproduce this are: >>> >>> 1. checkout latest linux.git >>> 2. make -j112 >>> >>> (IOW, it occurs 100% of the time for me on a clean tree.) > > I don't have access to such hardware where -j112 could ever make sense. :-)
:) I could push the builds onto the -j256 but I'm doing other stuff over there. :)
> In other words, I can't reproduce regardless of the -j value I try. > >> I suspect it's not new, it's just that you are able to hit the timing >> just right (and the new include presumable makes that just be much >> easier). > > Here's the best fix I can think of. I can't convince myself any other > location would be 100% safe. Obviously I can't confirm if this actually > fixes anything. > > ----- >8 > Subject: kbuild: make sure autoksyms.h exists early >
I'm building with this patch on top of latest now. I will put it in a tight loop and clear the drop_caches between builds to see if I can make it fail.
Thanks Nicolas -- your help is very much appreciated.
P.
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