Messages in this thread | | | Date | Thu, 17 Aug 2006 09:49:24 -0700 (PDT) | Subject | GadgetFS AIO problem | From | shankar@mistrals ... |
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Hi Greg, This is regarding debugging a problem in GadgetFS AIO functionality. I'm working on an developing a USB user space driver on top of the GadgetFS Driver on Linux Kernel version 2.6.10. I'm using the AIO support of the GadgetFS driver in my design. When I make a io_getevents call from the user space, it hangs and never returns. I see that there is a patch released to fix this on 2.6.17 kernel (http://www.kernel.org/pub/linux/kernel/people/gregkh/usb/2.6/2.6.17/). I tried applying the following of patches in the same order as mentioned below
usb-gadgetfs-highspeed-bugfix.patch (all the Hunks succeed) gadgetfs-fix-memory-leaks.patch (2 out of 6 Hunks, #4 and #6 FAILED) gadgetfs-fix-aio-interface-bugs.patch (all the Hunks succeed)
After applying the patches, I get some memory faults when the io_submit is called. But the io_getevetns returns without reading any data. I don't know whether it matters, but the libaio version that I use is libaio-0.3.99.
Please advice me on whether I'm applying the patches in the correct order or am I missing something here. If some one can give me a direction on how to go about fixing this, it would be great.
Please mark a copy of your reply to my email id: shankar@mistralsoftware.com
Thanks and Regards, Shankar
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