tree 3f9306c0dc66b049063e65cbb9e723cff6af524a
parent b8c9a18712f7b617fda66d878ce3759c9e575ba0
author Dave Kleikamp <shaggy@linux.vnet.ibm.com> 1199387373 -0600
committer Dave Kleikamp <shaggy@linux.vnet.ibm.com> 1199387373 -0600

JFS: clear PAGECACHE_TAG_DIRTY for no-write pages

When JFS decides to drop a dirty metapage, it simply clears the META_dirty
bit and leave alone the PG_dirty and PAGECACHE_TAG_DIRTY bits.

When such no-write page goes to metapage_writepage(), the `relic'
PAGECACHE_TAG_DIRTY tag should be cleared, to prevent pdflush from
repeatedly trying to sync them.  This is done through
set_page_writeback(), so call it should be called in all cases.  If
no I/O is initiated, end_page_writeback() should be called immediately.

This is how __block_write_full_page() does things.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
CC: Fengguang Wu <wfg@mail.ustc.edu.cn>