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/openbmc/linux/arch/powerpc/include/asm/
H A Dfadump.hdiff eae0dfcc44320c79a05637534d59af4643b2ee7b Thu Jun 01 12:21:26 CDT 2017 Hari Bathini <hbathini@linux.vnet.ibm.com> powerpc/fadump: avoid holes in boot memory area when fadump is registered

To register fadump, boot memory area - the size of low memory chunk that
is required for a kernel to boot successfully when booted with restricted
memory, is assumed to have no holes. But this memory area is currently
not protected from hot-remove operations. So, fadump could fail to
re-register after a memory hot-remove operation, if memory is removed
from boot memory area. To avoid this, ensure that memory from boot
memory area is not hot-removed when fadump is registered.

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Reviewed-by: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
/openbmc/linux/arch/powerpc/kernel/
H A Dfadump.cdiff eae0dfcc44320c79a05637534d59af4643b2ee7b Thu Jun 01 12:21:26 CDT 2017 Hari Bathini <hbathini@linux.vnet.ibm.com> powerpc/fadump: avoid holes in boot memory area when fadump is registered

To register fadump, boot memory area - the size of low memory chunk that
is required for a kernel to boot successfully when booted with restricted
memory, is assumed to have no holes. But this memory area is currently
not protected from hot-remove operations. So, fadump could fail to
re-register after a memory hot-remove operation, if memory is removed
from boot memory area. To avoid this, ensure that memory from boot
memory area is not hot-removed when fadump is registered.

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Reviewed-by: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
/openbmc/linux/arch/powerpc/platforms/pseries/
H A Dhotplug-memory.cdiff eae0dfcc44320c79a05637534d59af4643b2ee7b Thu Jun 01 12:21:26 CDT 2017 Hari Bathini <hbathini@linux.vnet.ibm.com> powerpc/fadump: avoid holes in boot memory area when fadump is registered

To register fadump, boot memory area - the size of low memory chunk that
is required for a kernel to boot successfully when booted with restricted
memory, is assumed to have no holes. But this memory area is currently
not protected from hot-remove operations. So, fadump could fail to
re-register after a memory hot-remove operation, if memory is removed
from boot memory area. To avoid this, ensure that memory from boot
memory area is not hot-removed when fadump is registered.

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Reviewed-by: Mahesh J Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>