JFS: make special inodes play nicely with page balancing
This patch fixes up a few problems with jfs's reserved inodes.
1. There is no need for the jfs code setting the I_DIRTY bits in i_state.
I am ashamed that the code ever did this, and surprised it hasn't been
noticed until now.
2. Make sure special inodes are on an inode hash list. If the inodes are
unhashed, __mark_inode_dirty will fail to put the inode on the
superblock's dirty list, and the data will not be flushed under memory
pressure.
3. Force writing journal data to disk when metapage_writepage is unable to
write a metadata page due to pending journal I/O.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 13d7e3f..c81c643 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -395,6 +395,12 @@
if (mp->nohomeok && !test_bit(META_forcewrite, &mp->flag)) {
redirty = 1;
+ /*
+ * Make sure this page isn't blocked indefinitely.
+ * If the journal isn't undergoing I/O, push it
+ */
+ if (mp->log && !(mp->log->cflag & logGC_PAGEOUT))
+ jfs_flush_journal(mp->log, 0);
continue;
}