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Date: Tue, 8 Jul 2008 21:37:53 +0200 From: Pavel Machek <pavel@...e.cz> To: Zhang Rui <rui.zhang@...el.com> Cc: linux-pm <linux-pm@...ts.linux-foundation.org>, linux-acpi <linux-acpi@...r.kernel.org>, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: [linux-pm] [RFC PATCH 0/4] save and restore ACPI NVS memory during hibernation Hi! > According to the ACPI spec, ACPI NVS memory region is required to > be saved/restored by OS during hibernation. > > Section 15.3.2 ACPI Spec 3.0b, > "OSPM will call the _PTS control method some time before entering > a sleeping state, to allow the platform???s AML code to update > this memory image before entering the sleeping state. > After the system awakes from an S4 state, OSPM will restore this > memory area and call the _WAK control method to enable the BIOS > to reclaim its memory image." > > This patch set add the mechanism to save/restore ACPI NVS memory > during hibernation. > > Patch 01: call platform_begin before swsusp_shrink_memory. > So that we can allocate enough pages for ACPI NVS memory > before shrink the memory. Why is it neccessary to allocate memory for a copy? We should be able to save ACPI NVS area same way we are saving kernel pages, no? -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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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