VxVM 5.0MP3RP3(HF5) panic "Oops: 0000 [1] SMP " in [vxio] vol_pageio_sio_start on Linux RHEL5

Article:TECH194126  |  Created: 2012-07-31  |  Updated: 2013-08-17  |  Article URL http://www.symantec.com/docs/TECH194126
Article Type
Technical Solution


Issue



System panic during normal operation:

 

Unable to handle kernel NULL pointer dereference at 0000000000000008 RIP: [<ffffffff88a2d2d1>] :vxio:vol_pageio_sio_start+0x1e/0xe5

PGD 30064ee067 PUD 30064ef067 PMD 0

Oops: 0000 [1] SMP

 

 


Error



Kernel stack trace:

crash> bt
PID: 32521  TASK: ffff8130606d07a0  CPU: 12  COMMAND: "vxiod"
#0 [ffff813055c0db70] crash_kexec at ffffffff800b099c
#1 [ffff813055c0dc30] __die at ffffffff80065137
#2 [ffff813055c0dc70] do_page_fault at ffffffff80067484
#3 [ffff813055c0dd60] error_exit at ffffffff8005dde9
   [exception RIP: vol_pageio_sio_start+30]
   RIP: ffffffff88a2d2d1  RSP: ffff813055c0de10  RFLAGS: 00010282
   RAX: ffffffff88b24c80  RBX: 0000000000000000  RCX: ffff81305a8ae600
   RDX: ffff813055c0dec0  RSI: ffff813055c0dec0  RDI: ffff81298cd48400
   RBP: ffff81298cd48400   R8: ffff812968a4dae0   R9: 0000000000000000
   R10: ffff811a06fab900  R11: 0000000000000060  R12: 0000000000000000
   R13: ffff813055c0dec0  R14: 0000000000000000  R15: 00002aaaab021010
   ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#4 [ffff813055c0de88] voliod_iohandle at ffffffff889081a5 [vxio]
#5 [ffff813055c0deb8] voliod_loop at ffffffff88908499 [vxio]
#6 [ffff813055c0df48] kernel_thread at ffffffff8005dfb1


Environment



RedHat Linux RHEL5, kernel release 2.6.18-308.8.1.el5

VRTSvxvm-common-5.0.30.35-MP3RP3HF5_RHEL5
VRTSvxvm-platform-5.0.30.35-MP3RP3HF5_RHEL5
 


Cause



The reason for panic is an improperly initialized SIO with a missing page for page level I/O. The SIO is in a chain of SIOs associated with DCL (Data Change Log) volume.
 


Solution



 Fix for RedHat Linux is available in 5.0MP4RP1 


Supplemental Materials

SourceETrack
Value2029735
Description

 Similar issue detected on AIX, system panic while trying to create snapshot



Article URL http://www.symantec.com/docs/TECH194126


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