b=23098 Check for slow i_alloc_sem acquiring

[fs/lustre-release.git] / lustre / obdfilter / filter_io.c

diff --git a/lustre/obdfilter/filter_io.c b/lustre/obdfilter/filter_io.c
index c53c435..45bf870 100644 (file)
--- a/lustre/obdfilter/filter_io.c
+++ b/lustre/obdfilter/filter_io.c
@@ -733,6 +733,7 @@ static int filter_preprw_write(int cmd, struct obd_export *exp, struct obdo *oa,
          * filter truncates are serialized by i_alloc_sem, allowing
          * multiple writes or single truncate. */
         down_read(&dentry->d_inode->i_alloc_sem);
+        fsfilt_check_slow(obd, now, "i_alloc_sem");
 
         /* Don't update inode timestamps if this write is older than a
          * setattr which modifies the timestamps. b=10150 */