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authorLinus Torvalds <torvalds@linux-foundation.org>2015-02-12 13:50:21 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-12 13:50:21 -0800
commit6bec0035286119eefc32a5b1102127e6a4032cb2 (patch)
tree440fab001b4c877b0b0c9fd62d8392e956e387e3 /mm/page-writeback.c
parent5d8e7fb6916556e9b476de33404e8c9e2c9aee61 (diff)
parent15d0f5ea348b9c4e6d41df294dde38a56a39c7bf (diff)
Merge branch 'for-3.20/bdi' of git://git.kernel.dk/linux-block
Pull backing device changes from Jens Axboe: "This contains a cleanup of how the backing device is handled, in preparation for a rework of the life time rules. In this part, the most important change is to split the unrelated nommu mmap flags from it, but also removing a backing_dev_info pointer from the address_space (and inode), and a cleanup of other various minor bits. Christoph did all the work here, I just fixed an oops with pages that have a swap backing. Arnd fixed a missing export, and Oleg killed the lustre backing_dev_info from staging. Last patch was from Al, unexporting parts that are now no longer needed outside" * 'for-3.20/bdi' of git://git.kernel.dk/linux-block: Make super_blocks and sb_lock static mtd: export new mtd_mmap_capabilities fs: make inode_to_bdi() handle NULL inode staging/lustre/llite: get rid of backing_dev_info fs: remove default_backing_dev_info fs: don't reassign dirty inodes to default_backing_dev_info nfs: don't call bdi_unregister ceph: remove call to bdi_unregister fs: remove mapping->backing_dev_info fs: export inode_to_bdi and use it in favor of mapping->backing_dev_info nilfs2: set up s_bdi like the generic mount_bdev code block_dev: get bdev inode bdi directly from the block device block_dev: only write bdev inode on close fs: introduce f_op->mmap_capabilities for nommu mmap support fs: kill BDI_CAP_SWAP_BACKED fs: deduplicate noop_backing_dev_info
Diffstat (limited to 'mm/page-writeback.c')
-rw-r--r--mm/page-writeback.c29
1 files changed, 13 insertions, 16 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 6a73e47e81c6..45e187b2d971 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1351,7 +1351,7 @@ static void balance_dirty_pages(struct address_space *mapping,
unsigned long task_ratelimit;
unsigned long dirty_ratelimit;
unsigned long pos_ratio;
- struct backing_dev_info *bdi = mapping->backing_dev_info;
+ struct backing_dev_info *bdi = inode_to_bdi(mapping->host);
bool strictlimit = bdi->capabilities & BDI_CAP_STRICTLIMIT;
unsigned long start_time = jiffies;
@@ -1574,7 +1574,7 @@ DEFINE_PER_CPU(int, dirty_throttle_leaks) = 0;
*/
void balance_dirty_pages_ratelimited(struct address_space *mapping)
{
- struct backing_dev_info *bdi = mapping->backing_dev_info;
+ struct backing_dev_info *bdi = inode_to_bdi(mapping->host);
int ratelimit;
int *p;
@@ -1929,7 +1929,7 @@ continue_unlock:
if (!clear_page_dirty_for_io(page))
goto continue_unlock;
- trace_wbc_writepage(wbc, mapping->backing_dev_info);
+ trace_wbc_writepage(wbc, inode_to_bdi(mapping->host));
ret = (*writepage)(page, wbc, data);
if (unlikely(ret)) {
if (ret == AOP_WRITEPAGE_ACTIVATE) {
@@ -2094,10 +2094,12 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
trace_writeback_dirty_page(page, mapping);
if (mapping_cap_account_dirty(mapping)) {
+ struct backing_dev_info *bdi = inode_to_bdi(mapping->host);
+
__inc_zone_page_state(page, NR_FILE_DIRTY);
__inc_zone_page_state(page, NR_DIRTIED);
- __inc_bdi_stat(mapping->backing_dev_info, BDI_RECLAIMABLE);
- __inc_bdi_stat(mapping->backing_dev_info, BDI_DIRTIED);
+ __inc_bdi_stat(bdi, BDI_RECLAIMABLE);
+ __inc_bdi_stat(bdi, BDI_DIRTIED);
task_io_account_write(PAGE_CACHE_SIZE);
current->nr_dirtied++;
this_cpu_inc(bdp_ratelimits);
@@ -2156,7 +2158,7 @@ void account_page_redirty(struct page *page)
if (mapping && mapping_cap_account_dirty(mapping)) {
current->nr_dirtied--;
dec_zone_page_state(page, NR_DIRTIED);
- dec_bdi_stat(mapping->backing_dev_info, BDI_DIRTIED);
+ dec_bdi_stat(inode_to_bdi(mapping->host), BDI_DIRTIED);
}
}
EXPORT_SYMBOL(account_page_redirty);
@@ -2298,7 +2300,7 @@ int clear_page_dirty_for_io(struct page *page)
*/
if (TestClearPageDirty(page)) {
dec_zone_page_state(page, NR_FILE_DIRTY);
- dec_bdi_stat(mapping->backing_dev_info,
+ dec_bdi_stat(inode_to_bdi(mapping->host),
BDI_RECLAIMABLE);
return 1;
}
@@ -2316,7 +2318,7 @@ int test_clear_page_writeback(struct page *page)
memcg = mem_cgroup_begin_page_stat(page);
if (mapping) {
- struct backing_dev_info *bdi = mapping->backing_dev_info;
+ struct backing_dev_info *bdi = inode_to_bdi(mapping->host);
unsigned long flags;
spin_lock_irqsave(&mapping->tree_lock, flags);
@@ -2351,7 +2353,7 @@ int __test_set_page_writeback(struct page *page, bool keep_write)
memcg = mem_cgroup_begin_page_stat(page);
if (mapping) {
- struct backing_dev_info *bdi = mapping->backing_dev_info;
+ struct backing_dev_info *bdi = inode_to_bdi(mapping->host);
unsigned long flags;
spin_lock_irqsave(&mapping->tree_lock, flags);
@@ -2405,12 +2407,7 @@ EXPORT_SYMBOL(mapping_tagged);
*/
void wait_for_stable_page(struct page *page)
{
- struct address_space *mapping = page_mapping(page);
- struct backing_dev_info *bdi = mapping->backing_dev_info;
-
- if (!bdi_cap_stable_pages_required(bdi))
- return;
-
- wait_on_page_writeback(page);
+ if (bdi_cap_stable_pages_required(inode_to_bdi(page->mapping->host)))
+ wait_on_page_writeback(page);
}
EXPORT_SYMBOL_GPL(wait_for_stable_page);