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Diffstat (limited to 'fs/xfs/linux-2.6/xfs_buf.c')
-rw-r--r--fs/xfs/linux-2.6/xfs_buf.c142
1 files changed, 72 insertions, 70 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 4fb01ffdfd1..e2bea6a661f 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -34,13 +34,13 @@
#include <linux/backing-dev.h>
#include <linux/freezer.h>
-STATIC kmem_zone_t *xfs_buf_zone;
-STATIC kmem_shaker_t xfs_buf_shake;
+static kmem_zone_t *xfs_buf_zone;
+static kmem_shaker_t xfs_buf_shake;
STATIC int xfsbufd(void *);
STATIC int xfsbufd_wakeup(int, gfp_t);
STATIC void xfs_buf_delwri_queue(xfs_buf_t *, int);
-STATIC struct workqueue_struct *xfslogd_workqueue;
+static struct workqueue_struct *xfslogd_workqueue;
struct workqueue_struct *xfsdatad_workqueue;
#ifdef XFS_BUF_TRACE
@@ -139,7 +139,7 @@ page_region_mask(
return mask;
}
-STATIC inline void
+STATIC_INLINE void
set_page_region(
struct page *page,
size_t offset,
@@ -151,7 +151,7 @@ set_page_region(
SetPageUptodate(page);
}
-STATIC inline int
+STATIC_INLINE int
test_page_region(
struct page *page,
size_t offset,
@@ -171,9 +171,9 @@ typedef struct a_list {
struct a_list *next;
} a_list_t;
-STATIC a_list_t *as_free_head;
-STATIC int as_list_len;
-STATIC DEFINE_SPINLOCK(as_lock);
+static a_list_t *as_free_head;
+static int as_list_len;
+static DEFINE_SPINLOCK(as_lock);
/*
* Try to batch vunmaps because they are costly.
@@ -1085,7 +1085,7 @@ xfs_buf_iostart(
return status;
}
-STATIC __inline__ int
+STATIC_INLINE int
_xfs_buf_iolocked(
xfs_buf_t *bp)
{
@@ -1095,7 +1095,7 @@ _xfs_buf_iolocked(
return 0;
}
-STATIC __inline__ void
+STATIC_INLINE void
_xfs_buf_ioend(
xfs_buf_t *bp,
int schedule)
@@ -1426,8 +1426,8 @@ xfs_free_bufhash(
/*
* buftarg list for delwrite queue processing
*/
-STATIC LIST_HEAD(xfs_buftarg_list);
-STATIC DEFINE_SPINLOCK(xfs_buftarg_lock);
+LIST_HEAD(xfs_buftarg_list);
+static DEFINE_SPINLOCK(xfs_buftarg_lock);
STATIC void
xfs_register_buftarg(
@@ -1679,21 +1679,60 @@ xfsbufd_wakeup(
return 0;
}
+/*
+ * Move as many buffers as specified to the supplied list
+ * idicating if we skipped any buffers to prevent deadlocks.
+ */
+STATIC int
+xfs_buf_delwri_split(
+ xfs_buftarg_t *target,
+ struct list_head *list,
+ unsigned long age)
+{
+ xfs_buf_t *bp, *n;
+ struct list_head *dwq = &target->bt_delwrite_queue;
+ spinlock_t *dwlk = &target->bt_delwrite_lock;
+ int skipped = 0;
+ int force;
+
+ force = test_and_clear_bit(XBT_FORCE_FLUSH, &target->bt_flags);
+ INIT_LIST_HEAD(list);
+ spin_lock(dwlk);
+ list_for_each_entry_safe(bp, n, dwq, b_list) {
+ XB_TRACE(bp, "walkq1", (long)xfs_buf_ispin(bp));
+ ASSERT(bp->b_flags & XBF_DELWRI);
+
+ if (!xfs_buf_ispin(bp) && !xfs_buf_cond_lock(bp)) {
+ if (!force &&
+ time_before(jiffies, bp->b_queuetime + age)) {
+ xfs_buf_unlock(bp);
+ break;
+ }
+
+ bp->b_flags &= ~(XBF_DELWRI|_XBF_DELWRI_Q|
+ _XBF_RUN_QUEUES);
+ bp->b_flags |= XBF_WRITE;
+ list_move_tail(&bp->b_list, list);
+ } else
+ skipped++;
+ }
+ spin_unlock(dwlk);
+
+ return skipped;
+
+}
+
STATIC int
xfsbufd(
- void *data)
+ void *data)
{
- struct list_head tmp;
- unsigned long age;
- xfs_buftarg_t *target = (xfs_buftarg_t *)data;
- xfs_buf_t *bp, *n;
- struct list_head *dwq = &target->bt_delwrite_queue;
- spinlock_t *dwlk = &target->bt_delwrite_lock;
- int count;
+ struct list_head tmp;
+ xfs_buftarg_t *target = (xfs_buftarg_t *)data;
+ int count;
+ xfs_buf_t *bp;
current->flags |= PF_MEMALLOC;
- INIT_LIST_HEAD(&tmp);
do {
if (unlikely(freezing(current))) {
set_bit(XBT_FORCE_SLEEP, &target->bt_flags);
@@ -1705,37 +1744,17 @@ xfsbufd(
schedule_timeout_interruptible(
xfs_buf_timer_centisecs * msecs_to_jiffies(10));
- count = 0;
- age = xfs_buf_age_centisecs * msecs_to_jiffies(10);
- spin_lock(dwlk);
- list_for_each_entry_safe(bp, n, dwq, b_list) {
- XB_TRACE(bp, "walkq1", (long)xfs_buf_ispin(bp));
- ASSERT(bp->b_flags & XBF_DELWRI);
-
- if (!xfs_buf_ispin(bp) && !xfs_buf_cond_lock(bp)) {
- if (!test_bit(XBT_FORCE_FLUSH,
- &target->bt_flags) &&
- time_before(jiffies,
- bp->b_queuetime + age)) {
- xfs_buf_unlock(bp);
- break;
- }
-
- bp->b_flags &= ~(XBF_DELWRI|_XBF_DELWRI_Q|
- _XBF_RUN_QUEUES);
- bp->b_flags |= XBF_WRITE;
- list_move_tail(&bp->b_list, &tmp);
- count++;
- }
- }
- spin_unlock(dwlk);
+ xfs_buf_delwri_split(target, &tmp,
+ xfs_buf_age_centisecs * msecs_to_jiffies(10));
+ count = 0;
while (!list_empty(&tmp)) {
bp = list_entry(tmp.next, xfs_buf_t, b_list);
ASSERT(target == bp->b_target);
list_del_init(&bp->b_list);
xfs_buf_iostrategy(bp);
+ count++;
}
if (as_list_len > 0)
@@ -1743,7 +1762,6 @@ xfsbufd(
if (count)
blk_run_address_space(target->bt_mapping);
- clear_bit(XBT_FORCE_FLUSH, &target->bt_flags);
} while (!kthread_should_stop());
return 0;
@@ -1756,40 +1774,24 @@ xfsbufd(
*/
int
xfs_flush_buftarg(
- xfs_buftarg_t *target,
- int wait)
+ xfs_buftarg_t *target,
+ int wait)
{
- struct list_head tmp;
- xfs_buf_t *bp, *n;
- int pincount = 0;
- struct list_head *dwq = &target->bt_delwrite_queue;
- spinlock_t *dwlk = &target->bt_delwrite_lock;
+ struct list_head tmp;
+ xfs_buf_t *bp, *n;
+ int pincount = 0;
xfs_buf_runall_queues(xfsdatad_workqueue);
xfs_buf_runall_queues(xfslogd_workqueue);
- INIT_LIST_HEAD(&tmp);
- spin_lock(dwlk);
- list_for_each_entry_safe(bp, n, dwq, b_list) {
- ASSERT(bp->b_target == target);
- ASSERT(bp->b_flags & (XBF_DELWRI | _XBF_DELWRI_Q));
- XB_TRACE(bp, "walkq2", (long)xfs_buf_ispin(bp));
- if (xfs_buf_ispin(bp)) {
- pincount++;
- continue;
- }
-
- list_move_tail(&bp->b_list, &tmp);
- }
- spin_unlock(dwlk);
+ set_bit(XBT_FORCE_FLUSH, &target->bt_flags);
+ pincount = xfs_buf_delwri_split(target, &tmp, 0);
/*
* Dropped the delayed write list lock, now walk the temporary list
*/
list_for_each_entry_safe(bp, n, &tmp, b_list) {
- xfs_buf_lock(bp);
- bp->b_flags &= ~(XBF_DELWRI|_XBF_DELWRI_Q|_XBF_RUN_QUEUES);
- bp->b_flags |= XBF_WRITE;
+ ASSERT(target == bp->b_target);
if (wait)
bp->b_flags &= ~XBF_ASYNC;
else
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 16:28:10 +0000