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Message-ID: <20080217211841.41643a21@laptopd505.fenrus.org> Date: Sun, 17 Feb 2008 21:18:41 -0800 From: Arjan van de Ven <arjan@...ux.intel.com> To: "Brown, Len" <len.brown@...el.com> Cc: "Laurent Riffard" <laurent.riffard@...e.fr>, "Andrew Morton" <akpm@...ux-foundation.org>, <linux-kernel@...r.kernel.org>, "Stuart Bennett" <sb476@....ac.uk> Subject: Re: 2.6.25-rc2-mm1: WARNING at arch/x86/mm/ioremap.c:129 On Sun, 17 Feb 2008 23:58:03 -0500 "Brown, Len" <len.brown@...el.com> wrote: > >Len: This WARN_ON says that ACPI is trying to call ioremap() > >on memory that the e820_table > >lists as "kernel owned". Do you know why ACPI would do this? > >Would ACPI get upset if > >the kernel would tell it to take a hike? > > Depends on the BIOS -- as it is the BIOS AML that is making this > request. is there any possible valid scenario where the BIOS AML would touch memory the kernel is using? (Since that seems to be what is going on; I'll cook up a diagnostics patch to get more info but the warning gets spewed if ioremap() is trying to map memory the kernel sees as ram) -- If you want to reach me at my work email, use arjan@...ux.intel.com For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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