On Tuesdayen den 28 August 2001 00:28, Marcelo Tosatti wrote:

On Tue, 28 Aug 2001, Daniel Phillips wrote:

quoted

On August 27, 2001 10:14 pm, Andrew Kay wrote:

quoted

I am having some rather serious problems with the memory management (i
think) in the 2.4.x kernels.  I am currently on the 2.4.9 and get lots
of these errors in /var/log/messages.

Aug 24 15:08:04 dell63 kernel: __alloc_pages: 1-order allocation
failed. Aug 24 15:08:35 dell63 last message repeated 448 times
Aug 24 15:09:37 dell63 last message repeated 816 times
Aug 24 15:10:38 dell63 last message repeated 1147 times

I am running a Redhat 7.1 distro w/2.4.9 kernel on a Dell poweredge
6300 (4x500Mhz cpu, 4Gb ram).  I get this error while running the
specmail 2001 benchmarking software against our email server,
Intrastore.  The system  is very idle from what I can see.  The sar
output shows user cpu at around 1% and everything else rather low as
well.  It seems to pop up randomly and requires a reboot to fix it.

Is there any workarounds or something I can do to get a more useful
debug message than this?

Please apply this patch:

--- 2.4.9.clean/mm/page_alloc.c	Thu Aug 16 12:43:02 2001
+++ 2.4.9/mm/page_alloc.c	Mon Aug 20 22:05:40 2001

@@ -502,7 +502,8 @@
 	}

 	/* No luck.. */
-	printk(KERN_ERR "__alloc_pages: %lu-order allocation failed.\n",

order); +	printk(KERN_ERR "__alloc_pages: %lu-order allocation failed
(gfp=0x%x/%i).\n", +		order, gfp_mask, !!(current->flags & PF_MEMALLOC));
 	return NULL;
 }

Daniel,

Its probably the bounce buffering thingie.

I'll send a patch to Linus soon.

I have seen reports of this problem when running without HIGHMEM (from 
Stephan von Krawczynski [off-list ref]).
But he is running with knfs(d) and raiserfs...

In this configuration I really want to know who is responsible for the allocs.
So, please add a
        show_trace(NULL);
too...

/RogerL

-- 
Roger Larsson
Skelleftea
Sweden
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