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[XFS] Allocate the struct xfs_ail

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Rather than embedding the struct xfs_ail in the struct xfs_mount, allocate
it during AIL initialisation. Add a back pointer to the struct xfs_ail so
that we can pass around the xfs_ail and still be able to access the
xfs_mount if need be. This is th first step involved in isolating the AIL
implementation from the surrounding filesystem code.

SGI-PV: 988143

SGI-Modid: xfs-linux-melb:xfs-kern:32346a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
This commit is contained in:
David Chinner
2008-10-30 17:38:26 +11:00
committed by Lachlan McIlroy
parent a7444053fb
commit 82fa901245
4 changed files with 77 additions and 65 deletions
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28
fs/xfs/linux-2.6/xfs_super.c
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@@ -814,18 +814,18 @@ xfs_setup_devices(
*/
void
xfsaild_wakeup(
xfs_mount_t *mp,
struct xfs_ail *ailp,
xfs_lsn_t threshold_lsn)
{
mp->m_ail.xa_target = threshold_lsn;
wake_up_process(mp->m_ail.xa_task);
ailp->xa_target = threshold_lsn;
wake_up_process(ailp->xa_task);
}
int
xfsaild(
void *data)
{
xfs_mount_t *mp = (xfs_mount_t *)data;
struct xfs_ail *ailp = data;
xfs_lsn_t last_pushed_lsn = 0;
long tout = 0;
@@ -837,11 +837,11 @@ xfsaild(
/* swsusp */
try_to_freeze();
ASSERT(mp->m_log);
if (XFS_FORCED_SHUTDOWN(mp))
ASSERT(ailp->xa_mount->m_log);
if (XFS_FORCED_SHUTDOWN(ailp->xa_mount))
continue;
tout = xfsaild_push(mp, &last_pushed_lsn);
tout = xfsaild_push(ailp, &last_pushed_lsn);
}
return 0;
@@ -849,20 +849,20 @@ xfsaild(
int
xfsaild_start(
xfs_mount_t *mp)
struct xfs_ail *ailp)
{
mp->m_ail.xa_target = 0;
mp->m_ail.xa_task = kthread_run(xfsaild, mp, "xfsaild");
if (IS_ERR(mp->m_ail.xa_task))
return -PTR_ERR(mp->m_ail.xa_task);
ailp->xa_target = 0;
ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
if (IS_ERR(ailp->xa_task))
return -PTR_ERR(ailp->xa_task);
return 0;
}
void
xfsaild_stop(
xfs_mount_t *mp)
struct xfs_ail *ailp)
{
kthread_stop(mp->m_ail.xa_task);
kthread_stop(ailp->xa_task);
}