Message-ID: <418F1DEB.7000905@avantwave.com>
Date: Mon, 08 Nov 2004 15:19:07 +0800
From: mike <mikelee@avantwave.com>
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To: Linux kernel mailing <linux-kernel@vger.kernel.org>
Subject: About Tasklet scheduling
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Dear all

    I am new to kernel driver development. Thanks for any help.

    I am modifing a USB Ramdisk to a USB mass storage(MTD) driver in a 
dragonball ARM9 platform.  I stop when using tasklet. The USB driver 
setup with endpoint 1 and 2 to be Interrupt IN and OUT point. So when 
ever there is a interrupt , I schedule the tasklet to read or write with 
semphone variable protection.
    The problem i am facing is that the read/write process is TOO SLOW 
for the host to response. I have tried to not use tasklet and call the 
read/write function directly, it works with small file but "schedule in 
interrupt" oops prompt out when transfer a large file . I have also try 
to use spin_lock_irqsave.. but it will stop the interrupt...

    I am in a hurry on this. Please give me a hand.

    Thanks

Mike,Lee
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