In our project, we want to transfer the realtime video data through wifi, and we are using the USB wifi card. We have found that the kernel will hangs up if we encode the video data and send the encoded data through the USB wifi card. But if we just only encode the video data or send data through the USB wifi card, the kernel won't hangs up. At last, we have found that the kernel will hangs up as long as we encode the video data or decode the video file when we send data through USB wifi card. We guess the problem maybe come from the video encode/decode module and the USB module. Based on the above guess, we also do an another test---copying data from the NFS file system to the USB flash disk while encoding/decoding, the kernel hangs up too. So we summarize that the problem coming from the encode/decode module and the USB module.
After that, we find a kernel patch. Now, the kernel won't hangs up if we copy data from NFS file system to the USB flash disk while encoding/decoding. But the kernel still hangs up if we send data through USB wifi card while encoding/decoding!
Is there anyone who has encountered this problem?
