Bob Picco 12710a56cb fix sysrq-m oops ... We aren't sampling for holes in memory. Thus we encounter a section hole with empty section map pointer for SPARSEMEM and OOPs for show_mem. This issue has been seen in 2.6.21, current git and current mm. The patch below is for mainline and mm. It was boot tested for SPARSEMEM, current VMEMMAP of Andy's in mm ml and DISCONTIGMEM. A slightly different patch will be posted to stable for 2.6.21. Previous to commit f0a5a58aa8 memory_present was called for node_start_pfn to node_end_pfn. This would cover the hole(s) with reserved pages and valid sections. Most SPARSEMEM supported arches do a pfn_valid check in show_mem before computing the page structure address. This issue was brought to my attention on IRC by Arnaldo Carvalho de Melo. Thanks to Arnaldo for testing. Signed-off-by: Bob Picco <bob.picco@hp.com> Cc: Chuck Ebbert <cebbert@redhat.com> Cc: Andi Kleen <ak@suse.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2007-06-08 17:23:34 -07:00
..
Makefile	…
extable.c	…
fault.c	enable interrupts in user path of page fault.	2007-06-07 17:05:03 -07:00
init.c	fix sysrq-m oops	2007-06-08 17:23:34 -07:00
ioremap.c	Revert "[PATCH] x86: __pa and __pa_symbol address space separation"	2007-05-07 08:44:24 -07:00
k8topology.c	[PATCH] x86-64: Don't enable NUMA for a single node in K8 NUMA scanning	2007-05-02 19:27:21 +02:00
mmap.c	…
numa.c	[PATCH] x86-64: set node_possible_map at runtime - try 2	2007-05-02 19:27:20 +02:00
pageattr.c	Revert "[PATCH] x86: __pa and __pa_symbol address space separation"	2007-05-07 08:44:24 -07:00
srat.c	[PATCH] x86-64: set node_possible_map at runtime - try 2	2007-05-02 19:27:20 +02:00