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Date: Thu, 31 Aug 2006 15:48:19 -0700 From: "Randy.Dunlap" <rdunlap@...otime.net> To: Pavel Machek <pavel@....cz> Cc: Andrew Morton <akpm@...l.org>, "Rafael J. Wysocki" <rjw@...k.pl>, kernel list <linux-kernel@...r.kernel.org> Subject: Re: prevent swsusp with PAE On Fri, 1 Sep 2006 00:35:21 +0200 Pavel Machek wrote: > Hi! > > > Pavel Machek <pavel@...e.cz> wrote: > > > > > If HIGHMEM64G and swsusp are used at the same time, nasty random > > > crashes happen during resume. Cause is known; prevent that > > > combination. > > > > > > I guess I'd like to see this one in 2.6.18... > > > > > > Signed-off-by: Pavel Machek <pavel@...e.cz> > > > > > > --- > > > commit acb3b411ec93f827b25b8481d53670c5c9195d89 > > > tree f52cd5518e34af16fe5ae28064717bcc95929f28 > > > parent cd03e183c58e6e7073e054a7fe335cf50c61fe2f > > > author <pavel@....ucw.cz> Thu, 31 Aug 2006 15:52:34 +0200 > > > committer <pavel@....ucw.cz> Thu, 31 Aug 2006 15:52:34 +0200 > > > > > > include/asm-i386/suspend.h | 8 ++++++++ > > > 1 files changed, 8 insertions(+), 0 deletions(-) > > > > > > diff --git a/include/asm-i386/suspend.h b/include/asm-i386/suspend.h > > > index 08be1e5..01cd812 100644 > > > --- a/include/asm-i386/suspend.h > > > +++ b/include/asm-i386/suspend.h > > > @@ -16,6 +16,15 @@ arch_prepare_suspend(void) > > > printk(KERN_ERR "PSE is required for swsusp.\n"); > > > return -EPERM; > > > } > > > + > > > +#ifdef CONFIG_X86_PAE > > > + printk(KERN_ERR "swsusp is incompatible with PAE.\n"); > > > + /* This is actually instance of the same problem. We need > > > + identity mapping self-contained in swsusp_pg_dir, and PAE > > > + prevents that. Solution could be copied from x86_64. */ > > > + return -EPERM; > > > +#endif > > > + > > > return 0; > > > } > > > > Why not do this in Kconfig?? > > Well, Kconfig does not provide natural place for comments, and > disappearing config option is sure to confuse people. But of course I > can do it. Documentation/kbuild/kconfig-language.txt includes a "comment" keyword. USB-storage uses it to suggest that SCSI + SCSI disk support need to be enabled for usb-storage. --- ~Randy - 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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