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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-28 09:54:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-28 09:54:45 -0700
commit90324cc1b11a211e37eabd8cb863e1a1561d6b1d (patch)
treec8b79c6850420a114ca6660c1b44fc486b1ba86d /include
parentfb8b00675eb6462aacab56bca31ed6107bda5314 (diff)
parent169ebd90131b2ffca74bb2dbe7eeacd39fb83714 (diff)
Merge tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux
Pull writeback tree from Wu Fengguang: "Mainly from Jan Kara to avoid iput() in the flusher threads." * tag 'writeback' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux: writeback: Avoid iput() from flusher thread vfs: Rename end_writeback() to clear_inode() vfs: Move waiting for inode writeback from end_writeback() to evict_inode() writeback: Refactor writeback_single_inode() writeback: Remove wb->list_lock from writeback_single_inode() writeback: Separate inode requeueing after writeback writeback: Move I_DIRTY_PAGES handling writeback: Move requeueing when I_SYNC set to writeback_sb_inodes() writeback: Move clearing of I_SYNC into inode_sync_complete() writeback: initialize global_dirty_limit fs: remove 8 bytes of padding from struct writeback_control on 64 bit builds mm: page-writeback.c: local functions should not be exposed globally
Diffstat (limited to 'include')
-rw-r--r--include/linux/fs.h13
-rw-r--r--include/linux/writeback.h10
-rw-r--r--include/trace/events/writeback.h36
3 files changed, 39 insertions, 20 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index c0e53372b08..cdc1a963094 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1764,8 +1764,8 @@ struct super_operations {
* I_FREEING Set when inode is about to be freed but still has dirty
* pages or buffers attached or the inode itself is still
* dirty.
- * I_CLEAR Added by end_writeback(). In this state the inode is clean
- * and can be destroyed. Inode keeps I_FREEING.
+ * I_CLEAR Added by clear_inode(). In this state the inode is
+ * clean and can be destroyed. Inode keeps I_FREEING.
*
* Inodes that are I_WILL_FREE, I_FREEING or I_CLEAR are
* prohibited for many purposes. iget() must wait for
@@ -1773,9 +1773,10 @@ struct super_operations {
* anew. Other functions will just ignore such inodes,
* if appropriate. I_NEW is used for waiting.
*
- * I_SYNC Synchonized write of dirty inode data. The bits is
- * set during data writeback, and cleared with a wakeup
- * on the bit address once it is done.
+ * I_SYNC Writeback of inode is running. The bit is set during
+ * data writeback, and cleared with a wakeup on the bit
+ * address once it is done. The bit is also used to pin
+ * the inode in memory for flusher thread.
*
* I_REFERENCED Marks the inode as recently references on the LRU list.
*
@@ -2349,7 +2350,7 @@ extern unsigned int get_next_ino(void);
extern void __iget(struct inode * inode);
extern void iget_failed(struct inode *);
-extern void end_writeback(struct inode *);
+extern void clear_inode(struct inode *);
extern void __destroy_inode(struct inode *);
extern struct inode *new_inode_pseudo(struct super_block *sb);
extern struct inode *new_inode(struct super_block *sb);
diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index a2b84f598e2..6d0a0fcd80e 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -58,7 +58,6 @@ extern const char *wb_reason_name[];
* in a manner such that unspecified fields are set to zero.
*/
struct writeback_control {
- enum writeback_sync_modes sync_mode;
long nr_to_write; /* Write this many pages, and decrement
this for each page written */
long pages_skipped; /* Pages which were not written */
@@ -71,6 +70,8 @@ struct writeback_control {
loff_t range_start;
loff_t range_end;
+ enum writeback_sync_modes sync_mode;
+
unsigned for_kupdate:1; /* A kupdate writeback */
unsigned for_background:1; /* A background writeback */
unsigned tagged_writepages:1; /* tag-and-write to avoid livelock */
@@ -94,6 +95,7 @@ long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages,
enum wb_reason reason);
long wb_do_writeback(struct bdi_writeback *wb, int force_wait);
void wakeup_flusher_threads(long nr_pages, enum wb_reason reason);
+void inode_wait_for_writeback(struct inode *inode);
/* writeback.h requires fs.h; it, too, is not included from here. */
static inline void wait_on_inode(struct inode *inode)
@@ -101,12 +103,6 @@ static inline void wait_on_inode(struct inode *inode)
might_sleep();
wait_on_bit(&inode->i_state, __I_NEW, inode_wait, TASK_UNINTERRUPTIBLE);
}
-static inline void inode_sync_wait(struct inode *inode)
-{
- might_sleep();
- wait_on_bit(&inode->i_state, __I_SYNC, inode_wait,
- TASK_UNINTERRUPTIBLE);
-}
/*
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 7b81887b023..b453d92c225 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -372,6 +372,35 @@ TRACE_EVENT(balance_dirty_pages,
)
);
+TRACE_EVENT(writeback_sb_inodes_requeue,
+
+ TP_PROTO(struct inode *inode),
+ TP_ARGS(inode),
+
+ TP_STRUCT__entry(
+ __array(char, name, 32)
+ __field(unsigned long, ino)
+ __field(unsigned long, state)
+ __field(unsigned long, dirtied_when)
+ ),
+
+ TP_fast_assign(
+ strncpy(__entry->name,
+ dev_name(inode_to_bdi(inode)->dev), 32);
+ __entry->ino = inode->i_ino;
+ __entry->state = inode->i_state;
+ __entry->dirtied_when = inode->dirtied_when;
+ ),
+
+ TP_printk("bdi %s: ino=%lu state=%s dirtied_when=%lu age=%lu",
+ __entry->name,
+ __entry->ino,
+ show_inode_state(__entry->state),
+ __entry->dirtied_when,
+ (jiffies - __entry->dirtied_when) / HZ
+ )
+);
+
DECLARE_EVENT_CLASS(writeback_congest_waited_template,
TP_PROTO(unsigned int usec_timeout, unsigned int usec_delayed),
@@ -450,13 +479,6 @@ DECLARE_EVENT_CLASS(writeback_single_inode_template,
)
);
-DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode_requeue,
- TP_PROTO(struct inode *inode,
- struct writeback_control *wbc,
- unsigned long nr_to_write),
- TP_ARGS(inode, wbc, nr_to_write)
-);
-
DEFINE_EVENT(writeback_single_inode_template, writeback_single_inode,
TP_PROTO(struct inode *inode,
struct writeback_control *wbc,