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authorEric Sandeen <sandeen@redhat.com>2015-10-12 07:04:45 +0200
committerDave Chinner <david@fromorbit.com>2015-10-12 07:04:45 +0200
commit847f9f6875fb02b576035e3dc31f5e647b7617a7 (patch)
tree34beacf9cf2facf6251ef86bce93753ba65e498a /fs/xfs/xfs_message.c
parentxfs: avoid dependency on Linux XATTR_SIZE_MAX (diff)
downloadlinux-847f9f6875fb02b576035e3dc31f5e647b7617a7.tar.xz
linux-847f9f6875fb02b576035e3dc31f5e647b7617a7.zip
xfs: more info from kmem deadlocks and high-level error msgs
In an effort to get more useful out of "possible memory allocation deadlock" messages, print the size of the requested allocation, and dump the stack if the xfs error level is tuned high. The stack dump is implemented in define_xfs_printk_level() for error levels >= LOGLEVEL_ERR, partly because it seems generically useful, and also because kmem.c has no knowledge of xfs error level tunables or other such bits, it's very kmem-specific. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
Diffstat (limited to 'fs/xfs/xfs_message.c')
-rw-r--r--fs/xfs/xfs_message.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/xfs/xfs_message.c b/fs/xfs/xfs_message.c
index d8b67547ab34..11792d888e4e 100644
--- a/fs/xfs/xfs_message.c
+++ b/fs/xfs/xfs_message.c
@@ -17,6 +17,7 @@
#include "xfs.h"
#include "xfs_fs.h"
+#include "xfs_error.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
@@ -43,6 +44,7 @@ void func(const struct xfs_mount *mp, const char *fmt, ...) \
{ \
struct va_format vaf; \
va_list args; \
+ int level; \
\
va_start(args, fmt); \
\
@@ -51,6 +53,11 @@ void func(const struct xfs_mount *mp, const char *fmt, ...) \
\
__xfs_printk(kern_level, mp, &vaf); \
va_end(args); \
+ \
+ if (!kstrtoint(kern_level, 0, &level) && \
+ level <= LOGLEVEL_ERR && \
+ xfs_error_level >= XFS_ERRLEVEL_HIGH) \
+ xfs_stack_trace(); \
} \
define_xfs_printk_level(xfs_emerg, KERN_EMERG);