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authorJens Axboe <jens.axboe@oracle.com>2009-09-23 19:37:09 +0200
committerJens Axboe <jens.axboe@oracle.com>2009-09-25 18:08:25 +0200
commit5b0830cb9085f4b69f9d57d7f3aaff322ffbec26 (patch)
tree10040eb359269d4cd05487790b758144a69e8e39
parent71fd05a887e0f3f6bfff76ff81b33776177d0606 (diff)
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writeback: get rid to incorrect references to pdflush in comments
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
-rw-r--r--fs/buffer.c10
-rw-r--r--fs/fs-writeback.c5
-rw-r--r--mm/page-writeback.c8
-rw-r--r--mm/shmem.c5
-rw-r--r--mm/vmscan.c8
5 files changed, 17 insertions, 19 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index 90a98865b0cc..fc22b4504087 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -274,7 +274,7 @@ void invalidate_bdev(struct block_device *bdev)
}
/*
- * Kick pdflush then try to free up some ZONE_NORMAL memory.
+ * Kick the writeback threads then try to free up some ZONE_NORMAL memory.
*/
static void free_more_memory(void)
{
@@ -1699,9 +1699,9 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
/*
* If it's a fully non-blocking write attempt and we cannot
* lock the buffer then redirty the page. Note that this can
- * potentially cause a busy-wait loop from pdflush and kswapd
- * activity, but those code paths have their own higher-level
- * throttling.
+ * potentially cause a busy-wait loop from writeback threads
+ * and kswapd activity, but those code paths have their own
+ * higher-level throttling.
*/
if (wbc->sync_mode != WB_SYNC_NONE || !wbc->nonblocking) {
lock_buffer(bh);
@@ -3191,7 +3191,7 @@ void block_sync_page(struct page *page)
* still running obsolete flush daemons, so we terminate them here.
*
* Use of bdflush() is deprecated and will be removed in a future kernel.
- * The `pdflush' kernel threads fully replace bdflush daemons and this call.
+ * The `flush-X' kernel threads fully replace bdflush daemons and this call.
*/
SYSCALL_DEFINE2(bdflush, int, func, long, data)
{
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 15e375bf93e6..15944f754e15 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -320,7 +320,7 @@ static bool inode_dirtied_after(struct inode *inode, unsigned long t)
* For inodes being constantly redirtied, dirtied_when can get stuck.
* It _appears_ to be in the future, but is actually in distant past.
* This test is necessary to prevent such wrapped-around relative times
- * from permanently stopping the whole pdflush writeback.
+ * from permanently stopping the whole bdi writeback.
*/
ret = ret && time_before_eq(inode->dirtied_when, jiffies);
#endif
@@ -1085,9 +1085,6 @@ EXPORT_SYMBOL(__mark_inode_dirty);
* If older_than_this is non-NULL, then only write out inodes which
* had their first dirtying at a time earlier than *older_than_this.
*
- * If we're a pdlfush thread, then implement pdflush collision avoidance
- * against the entire list.
- *
* If `bdi' is non-zero then we're being asked to writeback a specific queue.
* This function assumes that the blockdev superblock's inodes are backed by
* a variety of queues, so all inodes are searched. For other superblocks,
diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 3c78fc316202..8bef063125b1 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -58,7 +58,7 @@ static inline long sync_writeback_pages(unsigned long dirtied)
/* The following parameters are exported via /proc/sys/vm */
/*
- * Start background writeback (via pdflush) at this percentage
+ * Start background writeback (via writeback threads) at this percentage
*/
int dirty_background_ratio = 10;
@@ -477,8 +477,8 @@ get_dirty_limits(unsigned long *pbackground, unsigned long *pdirty,
* balance_dirty_pages() must be called by processes which are generating dirty
* data. It looks at the number of dirty pages in the machine and will force
* the caller to perform writeback if the system is over `vm_dirty_ratio'.
- * If we're over `background_thresh' then pdflush is woken to perform some
- * writeout.
+ * If we're over `background_thresh' then the writeback threads are woken to
+ * perform some writeout.
*/
static void balance_dirty_pages(struct address_space *mapping,
unsigned long write_chunk)
@@ -582,7 +582,7 @@ static void balance_dirty_pages(struct address_space *mapping,
bdi->dirty_exceeded = 0;
if (writeback_in_progress(bdi))
- return; /* pdflush is already working this queue */
+ return;
/*
* In laptop mode, we wait until hitting the higher threshold before
diff --git a/mm/shmem.c b/mm/shmem.c
index b206a7a32e2a..aa9481166aae 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1046,8 +1046,9 @@ static int shmem_writepage(struct page *page, struct writeback_control *wbc)
* sync from ever calling shmem_writepage; but a stacking filesystem
* may use the ->writepage of its underlying filesystem, in which case
* tmpfs should write out to swap only in response to memory pressure,
- * and not for pdflush or sync. However, in those cases, we do still
- * want to check if there's a redundant swappage to be discarded.
+ * and not for the writeback threads or sync. However, in those cases,
+ * we do still want to check if there's a redundant swappage to be
+ * discarded.
*/
if (wbc->for_reclaim)
swap = get_swap_page();
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 613e89f471d9..359c3c57ef85 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1709,10 +1709,10 @@ static void shrink_zones(int priority, struct zonelist *zonelist,
*
* If the caller is !__GFP_FS then the probability of a failure is reasonably
* high - the zone may be full of dirty or under-writeback pages, which this
- * caller can't do much about. We kick pdflush and take explicit naps in the
- * hope that some of these pages can be written. But if the allocating task
- * holds filesystem locks which prevent writeout this might not work, and the
- * allocation attempt will fail.
+ * caller can't do much about. We kick the writeback threads and take explicit
+ * naps in the hope that some of these pages can be written. But if the
+ * allocating task holds filesystem locks which prevent writeout this might not
+ * work, and the allocation attempt will fail.
*
* returns: 0, if no pages reclaimed
* else, the number of pages reclaimed