From: Dave Chinner <david@fromorbit.com>
To: Mark Tinguely <tinguely@sgi.com>
Cc: xfs@oss.sgi.com
Subject: [PATCH v2] xfs: active inodes stat is broken
Date: Wed, 3 Dec 2014 09:34:52 +1100 [thread overview]
Message-ID: <20141202223452.GF18131@dastard> (raw)
In-Reply-To: <20141202210204.GA18131@dastard>
From: Dave Chinner <dchinner@redhat.com>
vn_active only ever gets decremented, so it has a very large
negative number. Make it track the inode count we currently have
allocated properly so we can easily track the size of the inode
cache via tools like PCP.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
Version 2:
- move stat increment to inode allocation code rather than cache
miss code so that inc/dec are evenly balanced no matter who calls
them.
fs/xfs/xfs_icache.c | 2 ++
fs/xfs/xfs_super.c | 1 -
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 92ca910..9771b7e 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -63,6 +63,7 @@ xfs_inode_alloc(
return NULL;
}
+ XFS_STATS_INC(vn_active);
ASSERT(atomic_read(&ip->i_pincount) == 0);
ASSERT(!spin_is_locked(&ip->i_flags_lock));
ASSERT(!xfs_isiflocked(ip));
@@ -128,6 +129,7 @@ xfs_inode_free(
/* asserts to verify all state is correct here */
ASSERT(atomic_read(&ip->i_pincount) == 0);
ASSERT(!xfs_isiflocked(ip));
+ XFS_STATS_DEC(vn_active);
call_rcu(&VFS_I(ip)->i_rcu, xfs_inode_free_callback);
}
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index fee11c8..6b95851 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1005,7 +1005,6 @@ xfs_fs_evict_inode(
clear_inode(inode);
XFS_STATS_INC(vn_rele);
XFS_STATS_INC(vn_remove);
- XFS_STATS_DEC(vn_active);
xfs_inactive(ip);
}
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next prev parent reply other threads:[~2014-12-02 22:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-01 22:34 [PATCH] xfs: active inodes stat is broken Dave Chinner
2014-12-02 13:52 ` Mark Tinguely
2014-12-02 21:02 ` Dave Chinner
2014-12-02 22:34 ` Dave Chinner [this message]
2014-12-02 22:45 ` [PATCH v2] " Mark Tinguely
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