Commit 48008296 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: revert to using a kthread for AIL pushing
  xfs: force the log if we encounter pinned buffers in .iop_pushbuf
  xfs: do not update xa_last_pushed_lsn for locked items
parents 95bc156c 0030807c
......@@ -629,7 +629,7 @@ xfs_buf_item_push(
* the xfsbufd to get this buffer written. We have to unlock the buffer
* to allow the xfsbufd to write it, too.
*/
STATIC void
STATIC bool
xfs_buf_item_pushbuf(
struct xfs_log_item *lip)
{
......@@ -643,6 +643,7 @@ xfs_buf_item_pushbuf(
xfs_buf_delwri_promote(bp);
xfs_buf_relse(bp);
return true;
}
STATIC void
......
......@@ -183,13 +183,14 @@ xfs_qm_dqunpin_wait(
* search the buffer cache can be a time consuming thing, and AIL lock is a
* spinlock.
*/
STATIC void
STATIC bool
xfs_qm_dquot_logitem_pushbuf(
struct xfs_log_item *lip)
{
struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip);
struct xfs_dquot *dqp = qlip->qli_dquot;
struct xfs_buf *bp;
bool ret = true;
ASSERT(XFS_DQ_IS_LOCKED(dqp));
......@@ -201,17 +202,20 @@ xfs_qm_dquot_logitem_pushbuf(
if (completion_done(&dqp->q_flush) ||
!(lip->li_flags & XFS_LI_IN_AIL)) {
xfs_dqunlock(dqp);
return;
return true;
}
bp = xfs_incore(dqp->q_mount->m_ddev_targp, qlip->qli_format.qlf_blkno,
dqp->q_mount->m_quotainfo->qi_dqchunklen, XBF_TRYLOCK);
xfs_dqunlock(dqp);
if (!bp)
return;
return true;
if (XFS_BUF_ISDELAYWRITE(bp))
xfs_buf_delwri_promote(bp);
if (xfs_buf_ispinned(bp))
ret = false;
xfs_buf_relse(bp);
return ret;
}
/*
......
......@@ -708,13 +708,14 @@ xfs_inode_item_committed(
* marked delayed write. If that's the case, we'll promote it and that will
* allow the caller to write the buffer by triggering the xfsbufd to run.
*/
STATIC void
STATIC bool
xfs_inode_item_pushbuf(
struct xfs_log_item *lip)
{
struct xfs_inode_log_item *iip = INODE_ITEM(lip);
struct xfs_inode *ip = iip->ili_inode;
struct xfs_buf *bp;
bool ret = true;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_SHARED));
......@@ -725,7 +726,7 @@ xfs_inode_item_pushbuf(
if (completion_done(&ip->i_flush) ||
!(lip->li_flags & XFS_LI_IN_AIL)) {
xfs_iunlock(ip, XFS_ILOCK_SHARED);
return;
return true;
}
bp = xfs_incore(ip->i_mount->m_ddev_targp, iip->ili_format.ilf_blkno,
......@@ -733,10 +734,13 @@ xfs_inode_item_pushbuf(
xfs_iunlock(ip, XFS_ILOCK_SHARED);
if (!bp)
return;
return true;
if (XFS_BUF_ISDELAYWRITE(bp))
xfs_buf_delwri_promote(bp);
if (xfs_buf_ispinned(bp))
ret = false;
xfs_buf_relse(bp);
return ret;
}
/*
......
......@@ -68,6 +68,8 @@
#include <linux/ctype.h>
#include <linux/writeback.h>
#include <linux/capability.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/list_sort.h>
#include <asm/page.h>
......
......@@ -1652,24 +1652,13 @@ xfs_init_workqueues(void)
*/
xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_CPU_INTENSIVE, 8);
if (!xfs_syncd_wq)
goto out;
xfs_ail_wq = alloc_workqueue("xfsail", WQ_CPU_INTENSIVE, 8);
if (!xfs_ail_wq)
goto out_destroy_syncd;
return -ENOMEM;
return 0;
out_destroy_syncd:
destroy_workqueue(xfs_syncd_wq);
out:
return -ENOMEM;
}
STATIC void
xfs_destroy_workqueues(void)
{
destroy_workqueue(xfs_ail_wq);
destroy_workqueue(xfs_syncd_wq);
}
......
......@@ -350,7 +350,7 @@ typedef struct xfs_item_ops {
void (*iop_unlock)(xfs_log_item_t *);
xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
void (*iop_push)(xfs_log_item_t *);
void (*iop_pushbuf)(xfs_log_item_t *);
bool (*iop_pushbuf)(xfs_log_item_t *);
void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
} xfs_item_ops_t;
......
......@@ -28,8 +28,6 @@
#include "xfs_trans_priv.h"
#include "xfs_error.h"
struct workqueue_struct *xfs_ail_wq; /* AIL workqueue */
#ifdef DEBUG
/*
* Check that the list is sorted as it should be.
......@@ -356,16 +354,10 @@ xfs_ail_delete(
xfs_trans_ail_cursor_clear(ailp, lip);
}
/*
* xfs_ail_worker does the work of pushing on the AIL. It will requeue itself
* to run at a later time if there is more work to do to complete the push.
*/
STATIC void
xfs_ail_worker(
struct work_struct *work)
static long
xfsaild_push(
struct xfs_ail *ailp)
{
struct xfs_ail *ailp = container_of(to_delayed_work(work),
struct xfs_ail, xa_work);
xfs_mount_t *mp = ailp->xa_mount;
struct xfs_ail_cursor cur;
xfs_log_item_t *lip;
......@@ -427,8 +419,13 @@ xfs_ail_worker(
case XFS_ITEM_PUSHBUF:
XFS_STATS_INC(xs_push_ail_pushbuf);
IOP_PUSHBUF(lip);
ailp->xa_last_pushed_lsn = lsn;
if (!IOP_PUSHBUF(lip)) {
stuck++;
flush_log = 1;
} else {
ailp->xa_last_pushed_lsn = lsn;
}
push_xfsbufd = 1;
break;
......@@ -440,7 +437,6 @@ xfs_ail_worker(
case XFS_ITEM_LOCKED:
XFS_STATS_INC(xs_push_ail_locked);
ailp->xa_last_pushed_lsn = lsn;
stuck++;
break;
......@@ -501,20 +497,6 @@ out_done:
/* We're past our target or empty, so idle */
ailp->xa_last_pushed_lsn = 0;
/*
* We clear the XFS_AIL_PUSHING_BIT first before checking
* whether the target has changed. If the target has changed,
* this pushes the requeue race directly onto the result of the
* atomic test/set bit, so we are guaranteed that either the
* the pusher that changed the target or ourselves will requeue
* the work (but not both).
*/
clear_bit(XFS_AIL_PUSHING_BIT, &ailp->xa_flags);
smp_rmb();
if (XFS_LSN_CMP(ailp->xa_target, target) == 0 ||
test_and_set_bit(XFS_AIL_PUSHING_BIT, &ailp->xa_flags))
return;
tout = 50;
} else if (XFS_LSN_CMP(lsn, target) >= 0) {
/*
......@@ -537,9 +519,30 @@ out_done:
tout = 20;
}
/* There is more to do, requeue us. */
queue_delayed_work(xfs_syncd_wq, &ailp->xa_work,
msecs_to_jiffies(tout));
return tout;
}
static int
xfsaild(
void *data)
{
struct xfs_ail *ailp = data;
long tout = 0; /* milliseconds */
while (!kthread_should_stop()) {
if (tout && tout <= 20)
__set_current_state(TASK_KILLABLE);
else
__set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(tout ?
msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT);
try_to_freeze();
tout = xfsaild_push(ailp);
}
return 0;
}
/*
......@@ -574,8 +577,9 @@ xfs_ail_push(
*/
smp_wmb();
xfs_trans_ail_copy_lsn(ailp, &ailp->xa_target, &threshold_lsn);
if (!test_and_set_bit(XFS_AIL_PUSHING_BIT, &ailp->xa_flags))
queue_delayed_work(xfs_syncd_wq, &ailp->xa_work, 0);
smp_wmb();
wake_up_process(ailp->xa_task);
}
/*
......@@ -813,9 +817,18 @@ xfs_trans_ail_init(
INIT_LIST_HEAD(&ailp->xa_ail);
INIT_LIST_HEAD(&ailp->xa_cursors);
spin_lock_init(&ailp->xa_lock);
INIT_DELAYED_WORK(&ailp->xa_work, xfs_ail_worker);
ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild/%s",
ailp->xa_mount->m_fsname);
if (IS_ERR(ailp->xa_task))
goto out_free_ailp;
mp->m_ail = ailp;
return 0;
out_free_ailp:
kmem_free(ailp);
return ENOMEM;
}
void
......@@ -824,6 +837,6 @@ xfs_trans_ail_destroy(
{
struct xfs_ail *ailp = mp->m_ail;
cancel_delayed_work_sync(&ailp->xa_work);
kthread_stop(ailp->xa_task);
kmem_free(ailp);
}
......@@ -64,23 +64,17 @@ struct xfs_ail_cursor {
*/
struct xfs_ail {
struct xfs_mount *xa_mount;
struct task_struct *xa_task;
struct list_head xa_ail;
xfs_lsn_t xa_target;
struct list_head xa_cursors;
spinlock_t xa_lock;
struct delayed_work xa_work;
xfs_lsn_t xa_last_pushed_lsn;
unsigned long xa_flags;
};
#define XFS_AIL_PUSHING_BIT 0
/*
* From xfs_trans_ail.c
*/
extern struct workqueue_struct *xfs_ail_wq; /* AIL workqueue */
void xfs_trans_ail_update_bulk(struct xfs_ail *ailp,
struct xfs_ail_cursor *cur,
struct xfs_log_item **log_items, int nr_items,
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment