path: root/kernel
diff options
authorDave Young <dyoung@redhat.com>2017-11-17 15:30:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 16:10:03 -0800
commitde40ccefd1f19180c0a43e4d9b9d2f4dc8856c8b (patch)
tree9451a7905c322c02571abfe76539038d4069513e /kernel
parent426915796ccaf9c2bd9bb06dc5702225957bc2e5 (diff)
kdump: print a message in case parse_crashkernel_mem resulted in zero bytes
parse_crashkernel_mem() silently returns if we get zero bytes in the parsing function. It is useful for debugging to add a message, especially if the kernel cannot boot correctly. Add a pr_info instead of pr_warn because it is expected behavior for size = 0, eg. crashkernel=2G-4G:128M, size will be 0 in case system memory is less than 2G. Link: http://lkml.kernel.org/r/20171114080129.GA6115@dhcp-128-65.nay.redhat.com Signed-off-by: Dave Young <dyoung@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Bhupesh Sharma <bhsharma@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index 6db80fc0810b..b3663896278e 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -108,7 +108,8 @@ static int __init parse_crashkernel_mem(char *cmdline,
return -EINVAL;
- }
+ } else
+ pr_info("crashkernel size resulted in zero bytes\n");
return 0;

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