Bug 28479

Summary: [aic7xxx] kernel panic occured when adaptec scsi is accessed
Product: [Retired] Red Hat Linux Reporter: Bill Huang <bhuang>
Component: kernelAssignee: Doug Ledford <dledford>
Status: CLOSED NOTABUG QA Contact: Brock Organ <borgan>
Severity: high Docs Contact:
Priority: high    
Version: 7.3   
Target Milestone: ---   
Target Release: ---   
Hardware: ia64   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2001-02-21 21:32:39 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
kernel panic when access to scsi none

Description Bill Huang 2001-02-20 17:51:44 UTC 
(Originally reported by Hitachi)

Test machine: 8wayIA-64

Bug:Adaptec SCSI driver

Reason:
The new version 6.08BETA of the driver is used in Fisher,actually in this
version,
since distributed commands are too many,buffer(SW IO TLB) of kernel became
not enough and kernel got panic.

Soultions:
Change the default number of distributed commands from 254 to 3.
The patch is attached.
Comment 1 Bill Huang 2001-02-20 17:53:06 UTC 
Created attachment 10540 [details]
kernel panic when access to scsi
Comment 2 Glen Foster 2001-02-21 15:05:06 UTC 
This defect is considered MUST-FIX for Florence Release-Candidate #2
Comment 3 Michael K. Johnson 2001-02-21 17:51:17 UTC 
Please test with wolverine kernel and both aic7xxx and aic7xxx_new
drivers and report any problems with either driver.
Comment 4 Bill Huang 2001-02-21 20:30:09 UTC 
understood.
Comment 5 Bill Huang 2001-02-21 21:30:36 UTC 
Excuse me,which version do you mean?There seems no aicxxx_new included in
Wolverine version.

bash-2.04$ rpm -qlp kernel* | grep aic
/lib/modules/2.4.1-0.1.9/kernel/drivers/scsi/aic7xxx.o
/lib/modules/2.4.1-0.1.9/kernel/drivers/scsi/aic7xxx.o
/lib/modules/2.4.1-0.1.9/kernel/drivers/scsi/aic7xxx.o
/lib/modules/2.4.1-0.1.9BOOT/kernel/drivers/scsi/aic7xxx.o
/lib/modules/2.4.1-0.1.9enterprise/kernel/drivers/scsi/aic7xxx.o
/lib/modules/2.4.1-0.1.9smp/kernel/drivers/scsi/aic7xxx.o
/lib/modules/2.4.1-0.1.9smp/kernel/drivers/scsi/aic7xxx.o

bash-2.04$ pwd
/mnt/test/wolverine/i386/RedHat/RPMS

and the test platform is IA64.....
Comment 6 Bill Huang 2001-02-21 21:32:35 UTC 
Sorry,you mean in rawhide..
Comment 7 Doug Ledford 2001-02-21 23:38:44 UTC 
The patch to change the aic7xxx queue depth is the *wrong* thing to do here. 
You need to fix the core ia64 kernel code, the aic7xxx driver isn't doing
anything wrong.  If needed, someone should take this problem to the ia64 mailing
list and have the kernel people there write a proper fix.  I'm closing this bug
out since it isn't an aic7xxx problem, someone should open a new bug against the
ia64 kernel that the DMA mapping code uses an insufficient map table size and
doesn't dynamically expand it as needed.