• Olaf Hering's avatar
    xen pv-on-hvm: add pfn_is_ram helper for kdump · 34b6f01a
    Olaf Hering authored
    Register pfn_is_ram helper speed up reading /proc/vmcore in the kdump
    kernel. See commit message of 997c136f ("fs/proc/vmcore.c: add hook
    to read_from_oldmem() to check for non-ram pages") for details.
    
    It makes use of a new hvmop HVMOP_get_mem_type which was introduced in
    xen 4.2 (23298:26413986e6e0) and backported to 4.1.1.
    
    The new function is currently only enabled for reading /proc/vmcore.
    Later it will be used also for the kexec kernel. Since that requires
    more changes in the generic kernel make it static for the time being.
    Signed-off-by: default avatarOlaf Hering <olaf@aepfle.de>
    Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
    34b6f01a
hvm_op.h 2.5 KB