Date: Sat, 01 Oct 2005 07:43:51 +0100 From: Robert Slade <bsd@bathnetworks.com> To: Ansar Mohammed <ansarm@gmail.com> Cc: "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: RE: BGL Message-ID: <1128149031.28791.7.camel@lmail.bathnetworks.co.uk> In-Reply-To: <000901c5c63c$5c2fa190$0b02a8c0@northamerica.corp.microsoft.com> References: <000901c5c63c$5c2fa190$0b02a8c0@northamerica.corp.microsoft.com>
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On Sat, 2005-10-01 at 04:58, Ansar Mohammed wrote: > I love FreeBSD. I have been using it since 2.x. I have never had any > problems with it. Rock Solid. Never a single kernel panic. > > Then I come across this article in a comparison between Linux and FreeBSD > saying that FreeBSD has kernel locking issues. Specifically, a problem > nicknamed BGL or Big Giant Lock. It seems that it affects SMP systems under > high load. > > How much do other OSes suffer from this? > > > > -----Original Message----- > > From: Kris Kennaway [mailto:kris@obsecurity.org] > > Sent: September 30, 2005 4:46 PM > > To: Ansar Mohammed > > Cc: freebsd-questions@freebsd.org > > Subject: Re: BGL > > > > On Thu, Sep 29, 2005 at 10:09:17PM -0400, Ansar Mohammed wrote: > > > Is the kernel locking issue with FreeBSD 4.x sorted out in 5.x? I can't > > seem > > > to get a proper answer. > > > > Perhaps because the above isn't a proper question? Yes, the BGL was > > pushed down a lot in FreeBSD 5. It still covers some parts of the > > kernel (less in 6), so if can be more precise about a specific > > "locking issue" then perhaps we can give a more precise answer. > > > > Kris Ansar, I have had a mail server running a SMP kernel with Fedora Core 2 I have not seen any Kernel Lockup or random reboots. I am been having problems with a Quad processor machine with both 5.4 and 6 beta so much so that the machine is unusable with the SMP kernel. Hope this helps Rob
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