Message-ID: <BDE817654148D51189AC00306E063AAE054619@exchange.store-age.com>
From: Alexander Sandler <ASandler@store-age.com>
To: "Linux Kernel Mailing List (E-mail)" <linux-kernel@vger.kernel.org>
Subject: 2.4.17: Bug?
Date: Sun, 3 Feb 2002 18:04:10 +0200 
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Sender: linux-kernel-owner@vger.kernel.org

Hi all.

I found something that looks like a bug.

The configuration is the following:
Dual CPU machine with Linux RedHat 7.1 running kernel 2.4.17 
(official), connected to SAN with two FC-HBAs (QLogic 2200).

Bug appears when I am starting two processes, first doing I/O 
to first LUN through first HBA and second doing I/O to second 
LUN through second HBA. When I am disconnecting first HBA 
from the SAN, machine getting into four minute SCSI error 
recovery and then first process exits with I/O error as it 
should, while second process getting stacked and never 
returns (this is the problem - it should continue doing I/O 
like nothing happend).

This problem appearing on SMP kernel. On UP kernel, 
everything works fine.
I found this while I was working on volume manager driver. 
This driver should be able to do fail over to another HBA (if 
available) in case of error.

I have all required hardware and software to work out this 
problem so I'll be glad to give a hand to who ever can 
(should?) or/and will start working on this.

Alexandr Sandler.
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