Kernel "BUG: soft lockup" while copy data with scp to CIFS-Share

Solution Verified - Updated -

Issue

  • We use a CIFS share mounted from a NetApp NAS. When we copy (cp) files local to this share everything works fine (75MB/s).
  • But when we use scp to copy data from a remote server directly to the CIFS share, the server starts hanging, and after a while we get the following kernel message:
BUG: soft lockup - CPU#30 stuck for 64s! [rs:main Q:Reg:3020]
  • We get the same result, when we copy (cp) data from a mounted NFS share to the CIFS share instead of scp.

Environment

  • Red Hat Enterprise Linux 6.6 (kernel-2.6.32-504.el6)
  • CIFS share on NetApp NAS (file copy destination)
  • scp from another system (file copy source)
  • NFS from another mountpoint (file copy source)
  • CIFS and Samba package versions:
cifs-utils-4.8.1-19.el6.x86_64
samba-winbind-3.6.23-12.el6.x86_64
samba-winbind-clients-3.6.23-12.el6.x86_64
samba-client-3.6.23-12.el6.x86_64
samba4-libs-4.0.0-64.el6.rc4.x86_64
samba-common-3.6.23-12.el6.x86_64

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content