Michael S. Tsirkin wrote: > vhost net module wants to do copy to/from user from a kernel thread, > which needs use_mm (like what fs/aio has). Move that into mm/ and > export to modules.
Michael, Andrew, I am just curious: Is there any technical reason why a kthread cannot have a long-term use_mm() in effect? (Assuming this makes sense for the design, of course). For the cases there we know the kthread will always service the same context (such as with venettap/vhost, it may make sense to do a use_mm() at init time and just leave it until the thread exits. Will this break anything? Kind Regards, -Greg
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