linux-kernel - Re: [PATCH, DEBUG] x86/32: Add small delay after resume

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Message-ID: <20150617182939.GA11465@x230>
Date:	Wed, 17 Jun 2015 14:29:40 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Ingo Molnar <mingo@...nel.org>, mingo@...hat.com,
	tglx@...utronix.de, pavel@....cz, rjw@...ysocki.net,
	x86@...nel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Denys Vlasenko <dvlasenk@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	Borislav Petkov <bp@...en8.de>,
	Brian Gerst <brgerst@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Kleen, Andi" <andi.kleen@...el.com>
Subject: Re: [PATCH, DEBUG] x86/32: Add small delay after resume

On Wed, Jun 17, 2015 at 10:22:49AM -0700, H. Peter Anvin wrote:
> On 06/17/2015 09:33 AM, Konrad Rzeszutek Wilk wrote:
> >>>>
> >>
> >> Where does the GDT get initialized?
> >>
> >> 	-hpa
> > 
> > mit 84e70971e67d97bc2db18a4e76d42846272a54bd
> > Author: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> > Date:   Fri Apr 5 16:42:22 2013 -0400
> > 
> >     x86-32, gdt: Store/load GDT for ACPI S3 or hibernation/resume path is not needed
> > 
> 
> Store, no.  LOAD?

__save_processor_state:
..
  /*
         * We save it here, but restore it only in the hibernate case.
         * For ACPI S3 resume, this is loaded via 'early_gdt_desc' in
         * 64-bit
         * mode in "secondary_startup_64". In 32-bit mode it is done via
         * 'pmode_gdt' in wakeup_start.
         */

> 
> 	-hpa
> 
> 
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