Date: Wed, 25 Aug 2010 19:03:51 +0300 From: Andriy Gapon <avg@icyb.net.ua> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-stable@freebsd.org Subject: Re: kernel MCA messages Message-ID: <4C753EE7.3010805@icyb.net.ua> In-Reply-To: <4C75308F.3080504@icyb.net.ua> References: <4C71CC62.6060803@langille.org> <4C745213.3050004@langille.org> <201008250823.11954.jhb@freebsd.org> <4C75308F.3080504@icyb.net.ua>
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on 25/08/2010 18:02 Andriy Gapon said the following: > on 25/08/2010 15:23 John Baldwin said the following: >> That is because machine checks for corrected errors have to be polled and the >> kernel polls once an hour. On newer Intel CPUs (such as Nehalem) there is a >> separate interrupt (CMCI) that can fire for corrected errors. > > I think that on AMD it's possible to configure an interrupt for Bank 4 events as > well (perhaps other banks too), but I need to refresh my memory of BKDG. Yeah, for Bank 4 only, configurable via MSR0000_0413 and MSRC000_04[0A:08] Machine Check Misc 4 (Thresholding) Registers. Also, see section 2.12.1.6 Error Thresholding in Fam10h BKDG. -- Andriy Gapon
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