Date: Thu, 31 Jan 2008 11:03:06 -0800 From: Landon Fuller <landonf@bikemonkey.org> To: Julian Elischer <julian@elischer.org> Cc: Daniel Eischen <deischen@freebsd.org>, Gary Stanley <gary@velocity-servers.net>, Robert Watson <rwatson@FreeBSD.org>, freebsd-threads@freebsd.org Subject: Re: threads/119920: fork broken in libpthread Message-ID: <42D09215-18FD-43A1-97E8-D4CC9E97AFDD@bikemonkey.org> In-Reply-To: <47A2170D.6020308@elischer.org> References: <200801240850.m0O8o2JQ023500@freefall.freebsd.org> <4798564B.7070500@elischer.org> <Pine.GSO.4.64.0801240957550.16059@sea.ntplx.net> <20080128185830.B56811@fledge.watson.org> <479E3079.3000803@elischer.org> <20080129222455.T53151@fledge.watson.org> <20080131093321.K35034@fledge.watson.org> <47A2170D.6020308@elischer.org>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --Apple-Mail-29-160686945 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed On Jan 31, 2008, at 10:44, Julian Elischer wrote: > the releng 6 and releng 7 versions of this patch are at: > http://www.freebsd.org/~julian/kse-6.diff > and > http://www.freebsd.org/~julian/kse-7.diff > > but the one for 7 is just speculative. > I don't have a 7.x system to test. > > Landon, what is your test case? Inlined below. On our 8-core 6.3 system without this patch, the fork () threads wedge and spin in <2 minutes. With the patch, works as expected. #include <sys/types.h> #include <unistd.h> #include <pthread.h> void *forker (void *arg) { while (1) { pid_t pid = fork(); if (pid == 0) { exit(0); } else if (pid > 0) { int status; waitpid(pid, &status, 0); } else { printf("Fork failed\n"); abort(); } } } int main(void) { int i = 0; for (i = 0; i < 4; i++) { pthread_t thr; pthread_create(&thr, NULL, forker, NULL); pthread_detach(thr); } while(1) sleep(1000); } --Apple-Mail-29-160686945 content-type: application/pgp-signature; x-mac-type=70674453; name=PGP.sig content-description: This is a digitally signed message part content-disposition: inline; filename=PGP.sig content-transfer-encoding: 7bit -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) iD8DBQFHohtqlplZCE/15mMRArX+AJ4l9gd9JiEkf8lUh+YfVKydeF//AACePCBf oOVWV6RDLo9WpMnfFYlwsmY= =5b3p -----END PGP SIGNATURE----- --Apple-Mail-29-160686945--
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