Date: Fri, 4 Dec 2009 13:52:10 -0800 From: "Moore, Robert" <robert.moore@intel.com> To: Andriy Gapon <avg@freebsd.org> Cc: "freebsd-acpi@freebsd.org" <freebsd-acpi@freebsd.org>, Tarick <tungan@ukr.net> Subject: RE: panic in AcpiExReleaseMutex Message-ID: <4911F71203A09E4D9981D27F9D8308583E8F2C6E@orsmsx503.amr.corp.intel.com> In-Reply-To: <4B1982F5.9020805@freebsd.org> References: <4B178387.4050601@icyb.net.ua> <4911F71203A09E4D9981D27F9D8308583E8F26CF@orsmsx503.amr.corp.intel.com> <4B189CD6.30906@icyb.net.ua> <4911F71203A09E4D9981D27F9D8308583E8F2A1F@orsmsx503.amr.corp.intel.com> <4B1975EE.5070803@icyb.net.ua> <4911F71203A09E4D9981D27F9D8308583E8F2BA9@orsmsx503.amr.corp.intel.com> <4B197D0E.1020400@icyb.net.ua> <4911F71203A09E4D9981D27F9D8308583E8F2C06@orsmsx503.amr.corp.intel.com> <4B198142.2040407@icyb.net.ua> <4B1982F5.9020805@freebsd.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Then I think you are stuck with figuring out why AcquiredMutexList is NULL. AcquiredMutexList is set in AcpiExLinkMutex, clearing in AcpiExUnlinkMutex. In AcpiExAcquireMutex, AcpiExLinkMutex is called after the mutex is success= fully acquired, and only on the first acquisition. In AcpiExReleaseMutexObject, AcpiExUnLinkMutex is called, but only if the M= utex OwnerThread ID is non-zero. >-----Original Message----- >From: Andriy Gapon [mailto:avg@freebsd.org] >Sent: Friday, December 04, 2009 1:45 PM >To: Moore, Robert >Cc: freebsd-acpi@freebsd.org; Tarick >Subject: Re: panic in AcpiExReleaseMutex > >on 04/12/2009 23:38 Andriy Gapon said the following: >> on 04/12/2009 23:24 Moore, Robert said the following: >>> Another question, however: is the global lock involved in any way? >> >> Yes. EC querying is performed under global lock. That is, it gets >locked and >> unlocked in EcGpeQueryHandler function before _Qxx evaluation. >> I am actually curious why you asked this question. > >Hmm, I lied, this is done only if _GLK successfully evaluates to non-zero >value, >which is not the case. > >-- >Andriy Gapon
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4911F71203A09E4D9981D27F9D8308583E8F2C6E>