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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2008-01-03 13:09:33 -0600 |
|---|---|---|
| committer | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2008-01-03 13:09:33 -0600 |
| commit | 29a424f28390752a4ca2349633aaacc6be494db5 (patch) | |
| tree | 3f9306c0dc66b049063e65cbb9e723cff6af524a /fs/jfs | |
| parent | b8c9a18712f7b617fda66d878ce3759c9e575ba0 (diff) | |
| download | linux-29a424f28390752a4ca2349633aaacc6be494db5.tar.gz | |
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>
Diffstat (limited to 'fs/jfs')
| -rw-r--r-- | fs/jfs/jfs_metapage.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c index f5cd8d38af7a..b27fa117f229 100644 --- a/fs/jfs/jfs_metapage.c +++ b/fs/jfs/jfs_metapage.c @@ -360,6 +360,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) struct metapage *mp; int redirty = 0; sector_t lblock; + int nr_underway = 0; sector_t pblock; sector_t next_block = 0; sector_t page_start; @@ -371,6 +372,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) (PAGE_CACHE_SHIFT - inode->i_blkbits); BUG_ON(!PageLocked(page)); BUG_ON(PageWriteback(page)); + set_page_writeback(page); for (offset = 0; offset < PAGE_CACHE_SIZE; offset += PSIZE) { mp = page_to_mp(page, offset); @@ -413,11 +415,10 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) if (!bio->bi_size) goto dump_bio; submit_bio(WRITE, bio); + nr_underway++; bio = NULL; - } else { - set_page_writeback(page); + } else inc_io(page); - } xlen = (PAGE_CACHE_SIZE - offset) >> inode->i_blkbits; pblock = metapage_get_blocks(inode, lblock, &xlen); if (!pblock) { @@ -449,12 +450,16 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc) goto dump_bio; submit_bio(WRITE, bio); + nr_underway++; } if (redirty) redirty_page_for_writepage(wbc, page); unlock_page(page); + if (nr_underway == 0) + end_page_writeback(page); + return 0; add_failed: /* We should never reach here, since we're only adding one vec */ |