kernel BUG at pageattr:107

Hi,

I am getting the following error message as part of stack trace. I have a system with > 4G mem with RHEL4 x86_64. I installed the OS and when I did the reboot, the system failed with a stack trace with errors as follows:

Intializing hardware.....
kernel BUG at pageattr:107
Invalid operand:0000 [1] SMP

Modules linked in: hw_random tg3 floppy sd_mod aic79xx(U) scsi_mod

dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod
pid: 1217,comm:modprobe....
..............
................
...............
RIP ...{__change_page_attr+1039}
/etc/rc.d/rc.sysinit: line 167: 1217 Segmentation fault modprobe $1

I wanted to know if aic79xx driver is having some problems or is it kernel/scsi subsystem. I don't see the stack trace pointing to aic79xx driver at all.

Also, the above issue is only for > 4G mem.

Thanks in advance for the help.

with regards,
Anil

This was fixed a few days ago in a recent patch, titled:

x86_64: Don't look up struct page pointer of physical address in iounmap

It's only a one-line change:

tree b5d1e3e603823d798b77a91641f63f10a0a733b1
parent 1f5ee8da005f50d9f46ae5a7edba9a9c2d37b32e
author Andi Kleen <[email protected]> Tue, 17 May 2005 11:53:24 -0700 committer Linus Torvalds <[email protected]> Tue, 17 May 2005 21:59:14 -0700

[PATCH] x86_64: Don't look up struct page pointer of physical address in iounmap

It could be in a memory hole not mapped in mem_map and that causes the hash lookup to go off to nirvana.

 arch/x86_64/mm/ioremap.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

Index: arch/x86_64/mm/ioremap.c
===================================================================
@@ -272,7 +272,7 @@ void iounmap(volatile void __iomem *addr
 	if ((p->flags >> 20) &&
 		p->phys_addr + p->size - 1 < virt_to_phys(high_memory)) {
 		/* p->size includes the guard page, but cpa doesn't like that */
-		change_page_attr(virt_to_page(__va(p->phys_addr)),
+		change_page_attr_addr((unsigned long)__va(p->phys_addr),
 				 p->size >> PAGE_SHIFT,
 				 PAGE_KERNEL);
 		global_flush_tlb();

Timur Tabi
Staff Software Engineer
[email protected]

One thing a Southern boy will never say is,
"I don't think duct tape will fix it."
     -- Ed Smylie, NASA engineer for Apollo 13

Anil,

Please try the kernels here:

http://people.redhat.com/linville/kernels/rhel4/

They contain a patch that I believe applies to your situation. Please let me know the results of using those kernels.

Thanks,

John

John W. Linville
[email protected]