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authorNeil Horman <nhorman@tuxdriver.com>2009-04-02 16:58:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-02 19:05:04 -0700
commit04d491ab2a53008a1aa98ac09561768c7f3adda3 (patch)
treeab8fff6fb8674c8061b733ce64d6d6fba9d68ff3 /kernel/kexec.c
parent23c36c1aec895fd52d7dd8cd3ce4bbce43c969fd (diff)
downloadlinux-04d491ab2a53008a1aa98ac09561768c7f3adda3.tar.bz2
kexec: add dmesg log symbols to /proc/vmcoreinfo lists
It would be nice to be able to extract the dmesg log from a vmcore file without needing to keep the debug symbols for the running kernel handy all the time. We have a facility to do this in /proc/vmcore. This patch adds the log_buf and log_end symbols to the vmcoreinfo area so that tools (like makedumpfile) can easily extract the dmesg logs from a vmcore image. [akpm@linux-foundation.org: several fixes and cleanups] [akpm@linux-foundation.org: fix unused log_buf_kexec_setup()] [akpm@linux-foundation.org: build fix] Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Cc: Simon Horman <horms@verge.net.au> Acked-by: Vivek Goyal <vgoyal@redhat.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Simon Horman <horms@verge.net.au> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kexec.c')
-rw-r--r--kernel/kexec.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/kexec.c b/kernel/kexec.c
index 93eed85fe017..589832aac41f 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1409,6 +1409,7 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_OFFSET(list_head, prev);
VMCOREINFO_OFFSET(vm_struct, addr);
VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER);
+ log_buf_kexec_setup();
VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
VMCOREINFO_NUMBER(NR_FREE_PAGES);
VMCOREINFO_NUMBER(PG_lru);