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authorDave Chinner <dchinner@redhat.com>2013-04-30 21:39:34 +1000
committerBen Myers <bpm@sgi.com>2013-05-07 18:45:36 -0500
commit742ae1e35b038ed65ddd86182723441ea74db765 (patch)
tree3bc54c369e01383cab6abe1426ed9d50f4016d78 /fs/xfs/xfs_trans.h
parentcab09a81fbefcb21db5213a84461d421946f6eb8 (diff)
downloadlinux-742ae1e35b038ed65ddd86182723441ea74db765.tar.bz2
xfs: introduce CONFIG_XFS_WARN
Running a CONFIG_XFS_DEBUG kernel in production environments is not the best idea as it introduces significant overhead, can change the behaviour of algorithms (such as allocation) to improve test coverage, and (most importantly) panic the machine on non-fatal errors. There are many cases where all we want to do is run a kernel with more bounds checking enabled, such as is provided by the ASSERT() statements throughout the code, but without all the potential overhead and drawbacks. This patch converts all the ASSERT statements to evaluate as WARN_ON(1) statements and hence if they fail dump a warning and a stack trace to the log. This has minimal overhead and does not change any algorithms, and will allow us to find strange "out of bounds" problems more easily on production machines. There are a few places where assert statements contain debug only code. These are converted to be debug-or-warn only code so that we still get all the assert checks in the code. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_trans.h')
-rw-r--r--fs/xfs/xfs_trans.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index cd29f6171021..a44dba5b2cdb 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -405,7 +405,7 @@ typedef struct xfs_trans {
int64_t t_res_fdblocks_delta; /* on-disk only chg */
int64_t t_frextents_delta;/* superblock freextents chg*/
int64_t t_res_frextents_delta; /* on-disk only chg */
-#ifdef DEBUG
+#if defined(DEBUG) || defined(XFS_WARN)
int64_t t_ag_freeblks_delta; /* debugging counter */
int64_t t_ag_flist_delta; /* debugging counter */
int64_t t_ag_btree_delta; /* debugging counter */
@@ -433,7 +433,7 @@ typedef struct xfs_trans {
#define xfs_trans_get_block_res(tp) ((tp)->t_blk_res)
#define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
-#ifdef DEBUG
+#if defined(DEBUG) || defined(XFS_WARN)
#define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
#define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d)
#define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d)