From: Pavel Machek <pavel@ucw.cz>
To: Greg KH <greg@kroah.com>
Cc: kernel list <linux-kernel@vger.kernel.org>,
stern@rowland.harvard.edu, linux-usb@vger.kernel.org,
oliver@neukum.name
Subject: Re: 2.6.25 -- long standing bug with usb after resume with 4GB ram
Date: Thu, 13 Mar 2008 23:05:41 +0100 [thread overview]
Message-ID: <20080313220541.GA8115@elf.ucw.cz> (raw)
In-Reply-To: <20080313215842.GB15029@kroah.com>
Hi!
> > There are problems with usb after suspend/resume... it works as long
> > as memory is limited to 3G -- probably because iommu/agpgart/something
> > is not used in such case.
> >
> > rmmod/insmod of ehci_hcd & ohci_hcd fixes that.
> >
> > For testing with 2.6.25, you'll need aperture_64.c patch that makes
> > iommu as nosave (or it oopses).
>
> Any pointer to where this patch is?
>
> Can it go into 2.6.25?
Here it is: Yes, I guess it could go into 2.6.25...
Pavel
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 608152a..88747f3 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -18,6 +18,7 @@ #include <linux/pci_ids.h>
#include <linux/pci.h>
#include <linux/bitops.h>
#include <linux/ioport.h>
+#include <linux/suspend.h>
#include <asm/e820.h>
#include <asm/io.h>
#include <asm/gart.h>
@@ -76,6 +77,7 @@ static u32 __init allocate_aperture(void
printk(KERN_INFO "Mapping aperture over %d KB of RAM @ %lx\n",
aper_size >> 10, __pa(p));
insert_aperture_resource((u32)__pa(p), aper_size);
+ register_nosave_region((u32)__pa(p) >> PAGE_SHIFT, (u32)__pa(p+aper_size) >> PAGE_SHIFT);
return (u32)__pa(p);
}
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
pomozte zachranit klanovicky les: http://www.ujezdskystrom.info/
prev parent reply other threads:[~2008-03-13 22:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-13 11:01 2.6.25 -- long standing bug with usb after resume with 4GB ram Pavel Machek
2008-03-13 20:27 ` Rafael J. Wysocki
2008-03-13 21:58 ` Greg KH
2008-03-13 22:05 ` Pavel Machek [this message]
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