The patch titled
mm: count writeback pages per BDI
has been added to the -mm tree. Its filename is
mm-count-writeback-pages-per-bdi.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: mm: count writeback pages per BDI
From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Count per BDI writeback pages.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/backing-dev.h | 1 +
mm/page-writeback.c | 12 ++++++++++--
2 files changed, 11 insertions(+), 2 deletions(-)
diff -puN include/linux/backing-dev.h~mm-count-writeback-pages-per-bdi include/linux/backing-dev.h
--- a/include/linux/backing-dev.h~mm-count-writeback-pages-per-bdi
+++ a/include/linux/backing-dev.h
@@ -27,6 +27,7 @@ typedef int (congested_fn)(void *, int);
enum bdi_stat_item {
BDI_RECLAIMABLE,
+ BDI_WRITEBACK,
NR_BDI_STAT_ITEMS
};
diff -puN mm/page-writeback.c~mm-count-writeback-pages-per-bdi mm/page-writeback.c
--- a/mm/page-writeback.c~mm-count-writeback-pages-per-bdi
+++ a/mm/page-writeback.c
@@ -979,14 +979,18 @@ int test_clear_page_writeback(struct pag
int ret;
if (mapping) {
+ struct backing_dev_info *bdi = mapping->backing_dev_info;
unsigned long flags;
write_lock_irqsave(&mapping->tree_lock, flags);
ret = TestClearPageWriteback(page);
- if (ret)
+ if (ret) {
radix_tree_tag_clear(&mapping->page_tree,
page_index(page),
PAGECACHE_TAG_WRITEBACK);
+ if (bdi_cap_writeback_dirty(bdi))
+ __dec_bdi_stat(bdi, BDI_WRITEBACK);
+ }
write_unlock_irqrestore(&mapping->tree_lock, flags);
} else {
ret = TestClearPageWriteback(page);
@@ -1002,14 +1006,18 @@ int test_set_page_writeback(struct page
int ret;
if (mapping) {
+ struct backing_dev_info *bdi = mapping->backing_dev_info;
unsigned long flags;
write_lock_irqsave(&mapping->tree_lock, flags);
ret = TestSetPageWriteback(page);
- if (!ret)
+ if (!ret) {
radix_tree_tag_set(&mapping->page_tree,
page_index(page),
PAGECACHE_TAG_WRITEBACK);
+ if (bdi_cap_writeback_dirty(bdi))
+ __inc_bdi_stat(bdi, BDI_WRITEBACK);
+ }
if (!PageDirty(page))
radix_tree_tag_clear(&mapping->page_tree,
page_index(page),
_
Patches currently in -mm which might be from a.p.zijlstra@xxxxxxxxx are
lumpy-reclaim-v4.patch
split-mmap.patch
only-allow-nonlinear-vmas-for-ram-backed-filesystems.patch
mm-remove-destroy_dirty_buffers-from-invalidate_bdev.patch
mm-optimize-kill_bdev.patch
mm-optimize-kill_bdev-fix.patch
mm-optimize-acorn-partition-truncate.patch
lazy-freeing-of-memory-through-madv_free.patch
lazy-freeing-of-memory-through-madv_free-fix.patch
lazy-freeing-of-memory-through-madv_free-vs-mm-madvise-avoid-exclusive-mmap_sem.patch
restore-madv_dontneed-to-its-original-linux-behaviour.patch
exec-fix-remove_arg_zero-add-comment.patch
lockdep-treats-down_write_trylock-like-regular-down_write.patch
nfs-fix-congestion-control-use-atomic_longs.patch
nfs-remove-congestion_end.patch
lib-dampen-the-percpu_counter-fbc_batch.patch
lib-percpu_counter_mod64.patch
mm-bdi-init-hooks.patch
mm-scalable-bdi-statistics-counters.patch
mm-count-reclaimable-pages-per-bdi.patch
mm-count-writeback-pages-per-bdi.patch
mm-expose-bdi-statistics-in-sysfs.patch
mm-per-device-dirty-threshold.patch
-
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