xfs: add blockdev name to kthreads
This allows to see in `ps` and similar tools which kthreads are
allotted to which block device/filesystem, similar to what jbd2
does. As the process name is a fixed 16-char array, no extra
space is needed in tasks.
PID TTY STAT TIME COMMAND
2 ? S 0:00 [kthreadd]
197 ? S 0:00 \_ [jbd2/sda2-8]
198 ? S 0:00 \_ [ext4-dio-unwrit]
204 ? S 0:00 \_ [flush-8:0]
2647 ? S 0:00 \_ [xfs_mru_cache]
2648 ? S 0:00 \_ [xfslogd/0]
2649 ? S 0:00 \_ [xfsdatad/0]
2650 ? S 0:00 \_ [xfsconvertd/0]
2651 ? S 0:00 \_ [xfsbufd/ram0]
2652 ? S 0:00 \_ [xfsaild/ram0]
2653 ? S 0:00 \_ [xfssyncd/ram0]
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Reviewed-by: Dave Chinner <david@fromorbit.com>
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c
index 44c2b0e..f7ecc44 100644
--- a/fs/xfs/linux-2.6/xfs_buf.c
+++ b/fs/xfs/linux-2.6/xfs_buf.c
@@ -1614,7 +1614,8 @@
STATIC int
xfs_alloc_delwrite_queue(
- xfs_buftarg_t *btp)
+ xfs_buftarg_t *btp,
+ const char *fsname)
{
int error = 0;
@@ -1622,7 +1623,7 @@
INIT_LIST_HEAD(&btp->bt_delwrite_queue);
spin_lock_init(&btp->bt_delwrite_lock);
btp->bt_flags = 0;
- btp->bt_task = kthread_run(xfsbufd, btp, "xfsbufd");
+ btp->bt_task = kthread_run(xfsbufd, btp, "xfsbufd/%s", fsname);
if (IS_ERR(btp->bt_task)) {
error = PTR_ERR(btp->bt_task);
goto out_error;
@@ -1635,7 +1636,8 @@
xfs_buftarg_t *
xfs_alloc_buftarg(
struct block_device *bdev,
- int external)
+ int external,
+ const char *fsname)
{
xfs_buftarg_t *btp;
@@ -1647,7 +1649,7 @@
goto error;
if (xfs_mapping_buftarg(btp, bdev))
goto error;
- if (xfs_alloc_delwrite_queue(btp))
+ if (xfs_alloc_delwrite_queue(btp, fsname))
goto error;
xfs_alloc_bufhash(btp, external);
return btp;
diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h
index 386e736..5fbecef 100644
--- a/fs/xfs/linux-2.6/xfs_buf.h
+++ b/fs/xfs/linux-2.6/xfs_buf.h
@@ -390,7 +390,7 @@
/*
* Handling of buftargs.
*/
-extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *, int);
+extern xfs_buftarg_t *xfs_alloc_buftarg(struct block_device *, int, const char *);
extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *);
extern void xfs_wait_buftarg(xfs_buftarg_t *);
extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int);
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 29f1edc..e8ad6dd 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -789,18 +789,18 @@
* Setup xfs_mount buffer target pointers
*/
error = ENOMEM;
- mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0);
+ mp->m_ddev_targp = xfs_alloc_buftarg(ddev, 0, mp->m_fsname);
if (!mp->m_ddev_targp)
goto out_close_rtdev;
if (rtdev) {
- mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1);
+ mp->m_rtdev_targp = xfs_alloc_buftarg(rtdev, 1, mp->m_fsname);
if (!mp->m_rtdev_targp)
goto out_free_ddev_targ;
}
if (logdev && logdev != ddev) {
- mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1);
+ mp->m_logdev_targp = xfs_alloc_buftarg(logdev, 1, mp->m_fsname);
if (!mp->m_logdev_targp)
goto out_free_rtdev_targ;
} else {
@@ -902,7 +902,8 @@
struct xfs_ail *ailp)
{
ailp->xa_target = 0;
- ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild");
+ ailp->xa_task = kthread_run(xfsaild, ailp, "xfsaild/%s",
+ ailp->xa_mount->m_fsname);
if (IS_ERR(ailp->xa_task))
return -PTR_ERR(ailp->xa_task);
return 0;
diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c
index a427c63..a7ba355 100644
--- a/fs/xfs/linux-2.6/xfs_sync.c
+++ b/fs/xfs/linux-2.6/xfs_sync.c
@@ -660,7 +660,7 @@
mp->m_sync_work.w_syncer = xfs_sync_worker;
mp->m_sync_work.w_mount = mp;
mp->m_sync_work.w_completion = NULL;
- mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd");
+ mp->m_sync_task = kthread_run(xfssyncd, mp, "xfssyncd/%s", mp->m_fsname);
if (IS_ERR(mp->m_sync_task))
return -PTR_ERR(mp->m_sync_task);
return 0;