On Fri 06-05-11 11:08:30, Wu Fengguang wrote: > Code refactor for more logical code layout. > No behavior change. > > - remove the mis-named __writeback_inodes_sb() > > - wb_writeback()/writeback_inodes_wb() will decide when to queue_io() > before calling __writeback_inodes_wb() > You can add: Acked-by: Jan Kara <jack@xxxxxxx> Honza > Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx> > --- > fs/fs-writeback.c | 27 ++++++++++++--------------- > 1 file changed, 12 insertions(+), 15 deletions(-) > > --- linux-next.orig/fs/fs-writeback.c 2011-05-05 23:41:36.000000000 +0800 > +++ linux-next/fs/fs-writeback.c 2011-05-05 23:51:59.000000000 +0800 > @@ -580,17 +580,13 @@ static int writeback_sb_inodes(struct su > return 1; > } > > -void writeback_inodes_wb(struct bdi_writeback *wb, > - struct writeback_control *wbc) > +static void __writeback_inodes_wb(struct bdi_writeback *wb, > + struct writeback_control *wbc) > { > int ret = 0; > > if (!wbc->wb_start) > wbc->wb_start = jiffies; /* livelock avoidance */ > - spin_lock(&wb->list_lock); > - > - if (list_empty(&wb->b_io)) > - queue_io(wb, wbc->older_than_this); > > while (!list_empty(&wb->b_io)) { > struct inode *inode = wb_inode(wb->b_io.prev); > @@ -606,19 +602,16 @@ void writeback_inodes_wb(struct bdi_writ > if (ret) > break; > } > - spin_unlock(&wb->list_lock); > /* Leave any unwritten inodes on b_io */ > } > > -static void __writeback_inodes_sb(struct super_block *sb, > - struct bdi_writeback *wb, struct writeback_control *wbc) > +void writeback_inodes_wb(struct bdi_writeback *wb, > + struct writeback_control *wbc) > { > - WARN_ON(!rwsem_is_locked(&sb->s_umount)); > - > spin_lock(&wb->list_lock); > if (list_empty(&wb->b_io)) > queue_io(wb, wbc->older_than_this); > - writeback_sb_inodes(sb, wb, wbc, true); > + __writeback_inodes_wb(wb, wbc); > spin_unlock(&wb->list_lock); > } > > @@ -685,7 +678,7 @@ static long wb_writeback(struct bdi_writ > * The intended call sequence for WB_SYNC_ALL writeback is: > * > * wb_writeback() > - * __writeback_inodes_sb() <== called only once > + * writeback_sb_inodes() <== called only once > * write_cache_pages() <== called once for each inode > * (quickly) tag currently dirty pages > * (maybe slowly) sync all tagged pages > @@ -731,10 +724,14 @@ static long wb_writeback(struct bdi_writ > > retry: > trace_wbc_writeback_start(&wbc, wb->bdi); > + spin_lock(&wb->list_lock); > + if (list_empty(&wb->b_io)) > + queue_io(wb, wbc.older_than_this); > if (work->sb) > - __writeback_inodes_sb(work->sb, wb, &wbc); > + writeback_sb_inodes(work->sb, wb, &wbc, true); > else > - writeback_inodes_wb(wb, &wbc); > + __writeback_inodes_wb(wb, &wbc); > + spin_unlock(&wb->list_lock); > trace_wbc_writeback_written(&wbc, wb->bdi); > > work->nr_pages -= write_chunk - wbc.nr_to_write; > > -- Jan Kara <jack@xxxxxxx> SUSE Labs, CR -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html