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Oracle Linux 5.8 UEK2 Hung While Attempting To Re-Connect To CIFS Share (Doc ID 2547979.1)

Last updated on JUNE 04, 2020

Applies to:

Linux OS - Version Oracle Linux 5.8 with Unbreakable Enterprise Kernel [2.6.32] to Oracle Linux 5.8 with Unbreakable Enterprise Kernel [2.6.39] [Release OL5U8]
Oracle VM - Version 3.2.8 and later
Linux x86-64
samba-3.0.33-3.37.el5.x86_64
samba-client-3.0.33-3.37.el5.x86_64
samba-common-3.0.33-3.37.el5.x86_64

Symptoms

The Linux VM running OL5.8 UEK2 VM went un-responsive after losing connection to a CIFS share.
The Linux VM reported cpu spike in SAR reports before hung.
The OVM Server did not record any abnormal load or issues at that time.

Several stack traces found in the Linux VMs:

Dec 24 18:45:53 <hostname> kernel: [] cifs_reconnect_tcon+0xa0/0x2a0 [cifs]
Dec 24 18:45:53 <hostname> kernel: [] ? add_wait_queue_exclusive+0x60/0x60
Dec 24 18:45:54 <hostname> kernel: [] smb_init+0x3a/0x70 [cifs]
Dec 24 18:45:54 <hostname> kernel: [] CIFSSMBQPathInfo+0xcc/0x2c0 [cifs]
Dec 24 18:45:55 <hostname> kernel: [] cifs_get_inode_info+0x3c6/0x490 [cifs]

Cause

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In this Document
Symptoms
Cause
Solution


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