linux-kernel - Re: 2.6.18 intermittent parallel build failure

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20061012075235.GB2508@pelagius.h-e-r-e-s-y.com>
Date:	Thu, 12 Oct 2006 07:52:35 +0000
From:	andrew@...rond.org
To:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.18 intermittent parallel build failure

On Wed, Oct 11, 2006 at 11:25:58AM +0000, andrew@...rond.org wrote:
> When compiling the kernel on a Sun T1000 ( Niagra - 6 cores/24
> threads) with
> 
> 	make -j12
> 
> I occasionally see failures like:
> 

This was due a serious bug in gnu make; see
	https://savannah.gnu.org/bugs/?14853

This effects most of the recent make releases, and is _not_
sun/sparc/solaris specific, so don't stop reading the bug report at
the first line ;)

I've posted a patch against make-3.81 which fixes it for me.

Symptoms: Random crashing of make worker sub-processes at high -j#.
More pronounced when threads are waiting on i/o (make enables SIGCHLD
interrupts for short periods which can interrupt read(2) in the worker
threads and EINTR isn't handled)

This will likely effect anyone using large -j# on larger
multi-core/multi-processor machines, so BEWARE!

Andrew Walrond
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/