xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ceph: show tasks waiting on caps in debugfs caps file

Browse Source 
Add some visibility of tasks that are waiting for caps to the "caps"
debugfs file. Display the tgid of the waiting task, inode number, and
the caps the task needs and wants.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton
2019-11-20 12:00:59 -05:00
committed by Ilya Dryomov
parent ad8c28a9eb
commit 3a3430affc
4 changed files with 40 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
fs/ceph/debugfs.c
View File

@@ -139,6 +139,7 @@ static int caps_show(struct seq_file *s, void *p)
struct ceph_fs_client *fsc = s->private;
struct ceph_mds_client *mdsc = fsc->mdsc;
int total, avail, used, reserved, min, i;
struct cap_wait *cw;
ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
seq_printf(s, "total\t\t%d\n"
@@ -166,6 +167,18 @@ static int caps_show(struct seq_file *s, void *p)
}
mutex_unlock(&mdsc->mutex);
seq_printf(s, "\n\nWaiters:\n--------\n");
seq_printf(s, "tgid ino need want\n");
seq_printf(s, "-----------------------------------------------------\n");
spin_lock(&mdsc->caps_list_lock);
list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
seq_printf(s, "%-13d0x%-17lx%-17s%-17s\n", cw->tgid, cw->ino,
ceph_cap_string(cw->need),
ceph_cap_string(cw->want));
}
spin_unlock(&mdsc->caps_list_lock);
return 0;
}