[Bugme-new] [Bug 6731] New: mptscsih: ERROR -getFreeChainBuffer

[bugme-daemon at bugzilla.kernel.org]

http://bugzilla.kernel.org/show_bug.cgi?id=6731

           Summary: mptscsih: ERROR -getFreeChainBuffer
    Kernel Version: 2.6.17,1
            Status: NEW
          Severity: normal
             Owner: io_scsi at kernel-bugs.osdl.org
         Submitter: g.marshall at dalmany.co.uk


Most recent kernel where this bug did not occur: unknown
Distribution: gentoo
Hardware Environment: x86_64 Dual Core AMD Opteron Processor 265, LSI20320RB
(SN:P055445105)
ioc0: 53C1030: Capabilities={Initiator,Target}
scsi2 : ioc0: LSI53C1030, FwRev=01032700h, Ports=1, MaxQ=255, IRQ=18
Vendor: IFT       Model: A16U-G2421        Rev: 347D
Jun 22 08:13:13 db2 kernel:   Type:   Direct-Access                      ANSI
SCSI revision: 03

Software Environment: gentoo
Problem Description: Heavy disk I/O causes MPT driver to produce the following
error.
ERROR - Chain Buffer Needed
ERROR - getFreeChainBuffer

Jun 22 09:26:40 db2 kernel: mptscsih: ioc0: SG: Chain Required! sg done 3
Jun 22 09:26:40 db2 kernel: mptscsih: ioc0: ERROR - Chain Buffer Needed,
RequestNB=3 sgeOffset=84
Jun 22 09:26:40 db2 kernel: mptscsih: ioc0: getFreeChainBuffer called
Jun 22 09:26:40 db2 kernel: mptscsih: ioc0: ERROR - getFreeChainBuffer
chainBuf=ffff810103908920 ChainBuffer=ffff8101039087a0 offset=384 chain_idx=4
Jun 22 09:26:40 db2 kernel:   Current buff @ ffff810103906754 (index 0xa8)<6> 
Chain buff @ ffff810103908920 (index 0x4)
Jun 22 09:26:40 db2 kernel: mptscsih: ioc0: SG: Chain Required! sg done 7


kern.log with mpt debug will be attached.

Steps to reproduce:
cp or mv a largeish (>8Gb) file.

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