Date: Mon, 21 Feb 2005 16:30:23 GMT From: =?ISO-8859-1?Q?Se=E1n_C=2E_Farley?= <sean-freebsd@farley.org> To: freebsd-bugs@FreeBSD.org Subject: Re: gnu/77818: GDB locks in wait4() when running applications Message-ID: <200502211630.j1LGUNhi082095@freefall.freebsd.org>
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The following reply was made to PR gnu/77818; it has been noted by GNATS. From: =?ISO-8859-1?Q?Se=E1n_C=2E_Farley?= <sean-freebsd@farley.org> To: "Greg 'groggy' Lehey" <grog@FreeBSD.org> Cc: FreeBSD-gnats-submit@FreeBSD.org Subject: Re: gnu/77818: GDB locks in wait4() when running applications Date: Mon, 21 Feb 2005 10:24:17 -0600 (CST) This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --0-1375927335-1109003057=:73374 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Mon, 21 Feb 2005, Greg 'groggy' Lehey wrote: > On Sunday, 20 February 2005 at 19:15:01 -0600, Sean Farley wrote: >> >>> Synopsis: GDB locks in wait4() when running applications >> >>> Description: >> >> Whenever I run an application through the system's GDB, GDB locks in >> wait4(). It does not matter if the application has debugging >> information or not. /bin/ls will lock GDB up for me until I type >> Ctrl-C. > > Is this an SMP system? Neither system is SMP nor using HyperThreading. sysctl shows that the systems believe they only have one CPU (as expected). >> Two systems of mine exhibit this behavior. One has the binary nvidia >> driver with a lot of changes in libmap.conf. The other is headless >> without a libmap.conf. > > I've found something similar with SMP systems only. It wasn't as > consistent as the way you describe, and I was able to work around the > problem by turning off all but one CPU. See kern/77537 for more > details. It does sound similar. I wonder if it was something MFC'd from CURRENT, but I do not remember when it started hanging. Se=E1n --=20 sean-freebsd@farley.org --0-1375927335-1109003057=:73374--
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