writeback: rename nr_reclaimable to nr_dirty in balance_dirty_pages

Commit 8d92890bd6b85 ("mm/writeback: discard NR_UNSTABLE_NFS, use
NR_WRITEBACK instead") removed NR_UNSTABLE_NFS and nr_reclaimable only
contains dirty page now.  Rename nr_reclaimable to nr_dirty properly.

Link: https://lkml.kernel.org/r/20240423034643.141219-6-shikemeng@huaweicloud.com
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Brian Foster <bfoster@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: David Sterba <dsterba@suse.com>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index c5fb3121469ad515e128555ce2987b4e72e67d50..db5769cb12fd5bdb4c356488a856d1649f97205e 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1694,7 +1694,7 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
        struct dirty_throttle_control * const mdtc = mdtc_valid(&mdtc_stor) ?
                                                     &mdtc_stor : NULL;
        struct dirty_throttle_control *sdtc;
-       unsigned long nr_reclaimable;   /* = file_dirty */
+       unsigned long nr_dirty;
        long period;
        long pause;
        long max_pause;
@@ -1715,9 +1715,9 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
                unsigned long m_thresh = 0;
                unsigned long m_bg_thresh = 0;
 
-               nr_reclaimable = global_node_page_state(NR_FILE_DIRTY);
+               nr_dirty = global_node_page_state(NR_FILE_DIRTY);
                gdtc->avail = global_dirtyable_memory();
-               gdtc->dirty = nr_reclaimable + global_node_page_state(NR_WRITEBACK);
+               gdtc->dirty = nr_dirty + global_node_page_state(NR_WRITEBACK);
 
                domain_dirty_limits(gdtc);
 
@@ -1768,7 +1768,7 @@ static int balance_dirty_pages(struct bdi_writeback *wb,
                 * In normal mode, we start background writeout at the lower
                 * background_thresh, to keep the amount of dirty memory low.
                 */
-               if (!laptop_mode && nr_reclaimable > gdtc->bg_thresh &&
+               if (!laptop_mode && nr_dirty > gdtc->bg_thresh &&
                    !writeback_in_progress(wb))
                        wb_start_background_writeback(wb);