BackPup/Linux
1
0 Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-07 05:31:08 -04:00
Code Issues Packages Projects Releases Wiki Activity

x86/platform/UV: Fix kernel panic running RHEL kdump kernel on UV systems

Browse Source 
The latest UV kernel support panics when RHEL7 kexec's the kdump kernel
to make a dumpfile.  This patch fixes the problem by turning off all UV
support if NUMA is off.

Tested-by: Frank Ramsay <[email protected]>
Tested-by: John Estabrook <[email protected]>
Signed-off-by: Mike Travis <[email protected]>
Reviewed-by: Dimitri Sivanich <[email protected]>
Reviewed-by: Nathan Zimmer <[email protected]>
Cc: Alex Thorlton <[email protected]>
Cc: Andrew Banman <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Russ Anderson <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Mike Travis authored and Ingo Molnar committed 2016-08-10 15:55:39 +02:00
1 parent 22ac2bca92
commit 5a52e8f822
1 file changed
+5
Download Patch File Download Diff File Expand all files Collapse all files
arch/x86/kernel/apic/x2apic_uv_x.c
+5
View File
@@ -223,6 +223,11 @@ static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
if (strncmp(oem_id, "SGI", 3) != 0)
return 0;
if (numa_off) {
pr_err("UV: NUMA is off, disabling UV support\n");
return 0;
}
/* Setup early hub type field in uv_hub_info for Node 0 */
uv_cpu_info->p_uv_hub_info = &uv_hub_info_node0;