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ocfs2: track local alloc state via debugfs

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A per-mount debugfs file, "local_alloc" is created which when read will
expose live state of the nodes local alloc file. Performance impact is
minimal, only a bit of memory overhead per mount point. Still, the code is
hidden behind CONFIG_OCFS2_FS_STATS. This feature will help us debug
local alloc performance problems on a live system.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Mark Fasheh
2008-07-29 18:29:18 -07:00
parent 9c7af40b21
commit 9a8ff578fb
2 changed files with 92 additions and 0 deletions
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5
fs/ocfs2/ocfs2.h
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@@ -272,6 +272,11 @@ struct ocfs2_super
u64 la_last_gd;
#ifdef CONFIG_OCFS2_FS_STATS
struct dentry *local_alloc_debug;
char *local_alloc_debug_buf;
#endif
/* Next two fields are for local node slot recovery during
* mount. */
int dirty;