Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
References: <157558502272.10278.8718685637610645781.stgit@warthog.procyon.org.uk>
 <20191206135604.GB2734@twin.jikos.cz> <CAHk-=wj42ROD+dj1Nix=X7Raa9YjLfXykFczy0BkMqAXsFeLVA@mail.gmail.com>
 <CAHk-=wga+oXMeMjftCKGT=BA=B2Ucfwx18C5eV-DcPwOAJ18Fg@mail.gmail.com>
 <CAHk-=wj9pprDUeoJd5EeN-2x7+GXdSsm44mSv1y9f5e7MrTZ2A@mail.gmail.com> <qsh5n2$3pu9$1@blaine.gmane.org>
In-Reply-To: <qsh5n2$3pu9$1@blaine.gmane.org>
From:   Akemi Yagi <toracat@elrepo.org>
Date:   Sun, 8 Dec 2019 08:45:51 -0800
Message-ID: <CABA31DrsaqT-TsOVx=kbRBnuM5He53+=NLgwm94swY-x1UPjuA@mail.gmail.com>
Subject: Re: [PATCH 0/2] pipe: Fixes [ver #2]
To:     linux-kernel@vger.kernel.org
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        David Howells <dhowells@redhat.com>, toracat@elrepo.org
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Sat, Dec 7, 2019 at 1:31 PM Akemi Yagi <toracat@elrepo.org> wrote:
>
> 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.
>
> 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

I forgot to mention that the aforementioned bug in make was originally
reported for Fedora. They now have a patched version of make
(make-4.2.1-15.fc32) in Rawhide.

Akemi