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writeback: pass in super_block to bdi_start_writeback()
Sometimes we only want to write pages from a specific super_block,
so allow that to be passed in.
This fixes a problem with commit 56a131dcf7
causing writeback on all super_blocks on a bdi, where we only really
want to sync a specific sb from writeback_inodes_sb().
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
parent
6d7f18f6ea
commit
a72bfd4dea
3 changed files with 7 additions and 4 deletions
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@ -250,9 +250,11 @@ static void bdi_sync_writeback(struct backing_dev_info *bdi,
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* completion. Caller need not hold sb s_umount semaphore.
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*
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*/
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void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages)
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void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
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long nr_pages)
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{
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struct wb_writeback_args args = {
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.sb = sb,
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.sync_mode = WB_SYNC_NONE,
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.nr_pages = nr_pages,
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.range_cyclic = 1,
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@ -1206,7 +1208,7 @@ void writeback_inodes_sb(struct super_block *sb)
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nr_to_write = nr_dirty + nr_unstable +
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(inodes_stat.nr_inodes - inodes_stat.nr_unused);
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bdi_start_writeback(sb->s_bdi, nr_to_write);
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bdi_start_writeback(sb->s_bdi, sb, nr_to_write);
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}
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EXPORT_SYMBOL(writeback_inodes_sb);
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@ -101,7 +101,8 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent,
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const char *fmt, ...);
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int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
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void bdi_unregister(struct backing_dev_info *bdi);
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void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages);
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void bdi_start_writeback(struct backing_dev_info *bdi, struct super_block *sb,
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long nr_pages);
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int bdi_writeback_task(struct bdi_writeback *wb);
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int bdi_has_dirty_io(struct backing_dev_info *bdi);
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@ -596,7 +596,7 @@ static void balance_dirty_pages(struct address_space *mapping,
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(!laptop_mode && ((global_page_state(NR_FILE_DIRTY)
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+ global_page_state(NR_UNSTABLE_NFS))
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> background_thresh)))
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bdi_start_writeback(bdi, 0);
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bdi_start_writeback(bdi, NULL, 0);
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}
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void set_page_dirty_balance(struct page *page, int page_mkwrite)
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