Messages in this thread | | | Date | Wed, 9 Nov 2005 08:55:16 +0100 (CET) | From | Oliver Neukum <> | Subject | Re: userspace block driver? |
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On Wed, 9 Nov 2005, Jeff Garzik wrote:
> > Has anybody put any thought towards how a userspace block driver would work? > > Consider a block device implemented via an SSL network connection. I don't > want to put SSL in the kernel, which means the only other alternative is to > pass data to/from a userspace daemon.
I am afraid this is impossible without some heavy infrastructure work. You will almost inevitably deadlock. Yes, you can mlock() your driver, but that still will not tell the kernel that GFP_KERNEL must be replaced with GFP_NOIO if it is triggered by syscalls you are doing.
Regards Oliver
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