Messages in this thread | | | From | Akemi Yagi <> | Subject | Re: [PATCH 0/2] pipe: Fixes [ver #2] | Date | Sat, 7 Dec 2019 13:31:13 -0800 |
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On 12/6/19 10:59 AM, Linus Torvalds wrote: > Hmm. I think I just saw this same bug with a plain kernel compile. > > My "make -j32" suddenly came to a crawl, and seems to be entirely > single-threaded. > > And that's almost certainly because the way 'make' handles load > distribution is with a network of pipes that has a token passed to the > sub-makes. > > So there's most definitely something wrong with the new pipe rework. > Well, I can't _guarantee_ the pipes are the cause of this, but it does > smell like it. > > Linus >
We encountered what seems to be the same problem when building a kernel under RHEL 8.
As it turned out, this was due to a bug in make (make-4.2.1-9.el8) and a patch is available. Details are found in this Red Hat bugzilla report:
https://bugzilla.redhat.com/show_bug.cgi?id=1774790
Akemi
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