From aadc1b86a2e2e33144271445e64b3f1fa8ef5c56 Mon Sep 17 00:00:00 2001
From: alex <alex>
Date: Sat, 24 Jul 2004 12:06:50 +0000
Subject: [PATCH] b=3874
- avoid needless fsfilt_get_md() and taking i_sem on a non-splittable parent
---
lustre/mds/mds_lmv.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/lustre/mds/mds_lmv.c b/lustre/mds/mds_lmv.c
index 749691659c..6e97e63539 100644
--- a/lustre/mds/mds_lmv.c
+++ b/lustre/mds/mds_lmv.c
@@ -477,6 +477,8 @@ cleanup:
#define MAX_DIR_SIZE (64 * 1024)
+#define I_NON_SPLITTABLE 256
+
int mds_splitting_expected(struct obd_device *obd, struct dentry *dentry)
{
struct mds_obd *mds = &obd->u.mds;
@@ -495,6 +497,10 @@ int mds_splitting_expected(struct obd_device *obd, struct dentry *dentry)
if (!S_ISDIR(dentry->d_inode->i_mode))
return MDS_NO_SPLITTABLE;
+ /* already splittied or slave directory (part of splitted dir) */
+ if (dentry->d_inode->i_flags & I_NON_SPLITTABLE)
+ return MDS_NO_SPLITTABLE;
+
/* don't split root directory */
if (dentry->d_inode->i_ino == mds->mds_rootfid.id)
return MDS_NO_SPLITTABLE;
@@ -507,6 +513,8 @@ int mds_splitting_expected(struct obd_device *obd, struct dentry *dentry)
if (mea) {
/* already splitted or slave object: shouldn't be splitted */
rc = MDS_NO_SPLITTABLE;
+ /* mark to skip subsequent checks */
+ dentry->d_inode->i_flags |= I_NON_SPLITTABLE;
} else {
/* may be splitted */
rc = MDS_EXPECT_SPLIT;
--
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