lkml.org 
[lkml]   [2005]   [Nov]   [9]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateWed, 9 Nov 2005 08:55:16 +0100 (CET)
FromOliver Neukum <>
SubjectRe: userspace block driver?

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

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-11-09 09:16    [from the cache]
©2003-2008