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FW: 2.4.18-14 kernel stuck during ext3 umount with ping still responding



> 
> Hi,
> 
> I'm running a 2.4.18-14 kernel with a heavy IO profile using 
> ext3 over RAID 0+1 volumes. 
> 
> From time to time I get a black screen stuck machine while 
> trying to umount a volume during an IO workload (as part of a 
> failback solution - but after killing all IO processes ), 
> with ping still responding, but everything else mostly dead. 
> 
> I tried using the forcedumount patch to solve this problem - 
> to no avail. Also tried upgrading the qlogic drivers to the 
> latest drivers from Qlogic. 
> 
> After one of the occurences I managed to get some output 
> using the sysrq keys. 
> 
> This seems similar to what is described in 
> http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=77508 but 
> there is no solution yet...
> 
> What I have here is what I managed to copy down (for some 
> reason pgup/pgdown didn't work so not all information is 
> full...) and my sorted /proc/ksyms together with a manual 
> lookup of the call trace:
> 
> process umount
> EIP c01190b8			(set_running_and_schedule)
> call trace:
> c01144c9	f25f9ec0	IO_APIC_get_PCI_irq_vector
> c010a8b0	f25f9ed0	enable_irq
> c014200c	f25f9ef0	fsync_buffers_list
> c0155595	f25f9efc	clear_inode
> c015553d	f25f9f2c	invalidate_inodes
> c01461d8	f25f9f78	get_super
> c014a629	f25f9f94	path_release
> c0157c58	f25f9fc0	sys_umount
> c0108cab			sys_sigaltstack
> 
> 
> attached /proc/ksyms | sort
>  <<ksyms>> 
> Any idea what can cause this ? 
> 
> 
> Thanks,
> Yuval
> 
> 
> --
> Yuval Yeret
> Exanet
> yuval exanet com
> http://www.exanet.com
> Tel.  972-9-9717782
> Fax. 972-9-9717778
> 
> 
>  <<Yuval Yeret (E-mail).vcf>> 

Attachment: ksyms
Description: ksyms

BEGIN:VCARD
VERSION:2.1
N:Yeret;Yuval
FN:Yuval Yeret (E-mail)
ORG:Exanet
TITLE:Clustering and Platform Team Leader
TEL;WORK;VOICE:972-9-9717782
TEL;CELL;VOICE:972-54-802458
TEL;WORK;FAX:972-9-9717778
ADR;WORK;ENCODING=QUOTED-PRINTABLE:;;9 hamanofim st=0D=0Ap.o. 4064;Herzelia;;46140;Israel
LABEL;WORK;ENCODING=QUOTED-PRINTABLE:9 hamanofim st=0D=0Ap.o. 4064=0D=0AHerzelia 46140=0D=0AIsrael
EMAIL;PREF;INTERNET:mailto:yuval exanet com
REV:20020903T070728Z
END:VCARD

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