diff options
| -rw-r--r-- | kexec/arch/i386/kexec-x86-common.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/kexec/arch/i386/kexec-x86-common.c b/kexec/arch/i386/kexec-x86-common.c index 00c2be3..1453780 100644 --- a/kexec/arch/i386/kexec-x86-common.c +++ b/kexec/arch/i386/kexec-x86-common.c @@ -27,6 +27,7 @@ #include "../../kexec.h" #include "../../kexec-syscall.h" #include "../../firmware_memmap.h" +#include "../../crashdump.h" #include "kexec-x86.h" static struct memory_range memory_range[MAX_MEMORY_RANGES]; @@ -147,7 +148,14 @@ int get_memory_ranges(struct memory_range **range, int *ranges, { int ret, i; - if (have_sys_firmware_memmap()) + /* + * When using Xen, /sys/firmware/memmap (i.e., the E820 map) is + * wrong, it just provides one large memory are and that cannot + * be used for Kdump. Use always the /proc/iomem interface there + * even if we have /sys/firmware/memmap. Without that, /proc/vmcore + * is empty in the kdump kernel. + */ + if (!xen_present() && have_sys_firmware_memmap()) ret = get_memory_ranges_sysfs(range, ranges); else ret = get_memory_ranges_proc_iomem(range, ranges); |