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| author | Mike Travis <travis@sgi.com> | 2016-08-01 13:40:53 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-08-10 15:55:39 +0200 |
| commit | 5a52e8f822374bebc702bb2688ed8b5515bbb55b (patch) | |
| tree | e416dd2873464a9fd098bd3a1878b919544ad10e | |
| parent | 22ac2bca92f2d92c6495248d65ff648182df428d (diff) | |
| download | blackbird-op-linux-5a52e8f822374bebc702bb2688ed8b5515bbb55b.tar.gz blackbird-op-linux-5a52e8f822374bebc702bb2688ed8b5515bbb55b.zip | |
x86/platform/UV: Fix kernel panic running RHEL kdump kernel on UV systems
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 <framsay@sgi.com>
Tested-by: John Estabrook <estabrook@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Dimitri Sivanich <sivanich@sgi.com>
Reviewed-by: Nathan Zimmer <nzimmer@sgi.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andrew Banman <abanman@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russ Anderson <rja@sgi.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20160801184050.577755634@asylum.americas.sgi.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index 6aa0545879bb..cb0673c1e940 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -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; |
