linux-kernel - Re: 2.6.35-rc4 Graphics performance issue and freeing invalid memtype messages on boot.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 8 Jul 2010 15:26:56 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Andrew Hendry <andrew.hendry@...il.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	dri-devel@...ts.freedesktop.org, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Maciej Rutecki <maciej.rutecki@...il.com>
Subject: Re: 2.6.35-rc4 Graphics performance issue and freeing invalid
 memtype messages on boot.

(Rafael, Maciej: two probably-separate post-2.6.34 regressions here)

On Tue, 06 Jul 2010 22:22:17 +1000
Andrew Hendry <andrew.hendry@...il.com> wrote:

> 
> Some extra messages when booting with -rc4. Didn't get them in -rc3.
> [    1.387013] swapper:1 freeing invalid memtype bf788000-bf789000
> [    1.387409] swapper:1 freeing invalid memtype bf789000-bf78a000
> [    5.999675] modprobe:548 freeing invalid memtype d0000000-d0040000
> [    6.068347] modprobe:548 freeing invalid memtype d0140000-d0150000
> [    6.068647] modprobe:548 freeing invalid memtype d0150000-d0160000
> [    6.069661] modprobe:548 freeing invalid memtype d0170000-d01f0000
> [    6.085969] modprobe:548 freeing invalid memtype d01f0000-d0200000
> [    6.087673] modprobe:548 freeing invalid memtype d0210000-d0220000
> [    6.087900] modprobe:548 freeing invalid memtype d0220000-d0230000
> [    6.088092] modprobe:548 freeing invalid memtype d0230000-d0240000
> [    6.088317] modprobe:548 freeing invalid memtype d0240000-d0250000

hrmpf, one of those wonderful messages where neither it nor its source
code give you any clue regarding what caused it nor how to fix it.

please, apply this:

--- a/arch/x86/mm/pat.c~a
+++ a/arch/x86/mm/pat.c
@@ -359,7 +359,7 @@ int free_memtype(u64 start, u64 end)
 	entry = rbt_memtype_erase(start, end);
 	spin_unlock(&memtype_lock);
 
-	if (!entry) {
+	if (WARN_ON(!entry)) {
 		printk(KERN_INFO "%s:%d freeing invalid memtype %Lx-%Lx\n",
 			current->comm, current->pid, start, end);
 		return -EINVAL;


and let's at least see where it's coming from.

> Not sure if its related, but also have a noticeable performance issue with graphics under rc4.
> Dragging and resizing windows, screen updates, and jumpy cursor are all slow.
> Playing a full screen video under vlc gets only 1-2 frames per second, but plays fine under rc3.
> Tested a kernel compile, it was roughly the same.
> Userspace is ubunutu 10.04 64bit. 
> 
> Any hints? Otherwise will start a bisect tomorrow night.
> 
> Config attached, lspci, rc3 and rc4 boot messages below:

What graphics hardware are you using?

--
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/