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Commit 8950329c authored by Hari Bathini's avatar Hari Bathini Committed by Michael Ellerman
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powerpc/kdump: Handle crashkernel memory reservation failure 



Memory reservation for crashkernel could fail if there are holes around
kdump kernel offset (128M). Fail gracefully in such cases and print an
error message.

Signed-off-by: default avatarHari Bathini <hbathini@linux.ibm.com>
Tested-by: default avatarDavid Gibson <dgibson@redhat.com>
Reviewed-by: default avatarDave Young <dyoung@redhat.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 741c5640

arch/powerpc/kernel/machine_kexec.c

+6 −1
Original line number Diff line number Diff line
@@ -188,7 +188,12 @@ void __init reserve_crashkernel(void) 
			(unsigned long)(crashk_res.start >> 20),

			(unsigned long)(memblock_phys_mem_size() >> 20));



	memblock_reserve(crashk_res.start, crash_size);

	if (!memblock_is_region_memory(crashk_res.start, crash_size) ||

	    memblock_reserve(crashk_res.start, crash_size)) {

		pr_err("Failed to reserve memory for crashkernel!\n");

		crashk_res.start = crashk_res.end = 0;

		return;

	}

}



int overlaps_crashkernel(unsigned long start, unsigned long size)