diff options
Diffstat (limited to 'kernel/crash_core.c')
| -rw-r--r-- | kernel/crash_core.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/crash_core.c b/kernel/crash_core.c index f64d35e28411..07b26df453a9 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -9,6 +9,7 @@ #include <linux/init.h> #include <linux/utsname.h> #include <linux/vmalloc.h> +#include <linux/sizes.h> #include <asm/page.h> #include <asm/sections.h> @@ -45,6 +46,15 @@ static int __init parse_crashkernel_mem(char *cmdline, unsigned long long *crash_base) { char *cur = cmdline, *tmp; + unsigned long long total_mem = system_ram; + + /* + * Firmware sometimes reserves some memory regions for its own use, + * so the system memory size is less than the actual physical memory + * size. Work around this by rounding up the total size to 128M, + * which is enough for most test cases. + */ + total_mem = roundup(total_mem, SZ_128M); /* for each entry of the comma-separated list */ do { @@ -89,13 +99,13 @@ static int __init parse_crashkernel_mem(char *cmdline, return -EINVAL; } cur = tmp; - if (size >= system_ram) { + if (size >= total_mem) { pr_warn("crashkernel: invalid size\n"); return -EINVAL; } /* match ? */ - if (system_ram >= start && system_ram < end) { + if (total_mem >= start && total_mem < end) { *crash_size = size; break; } |