On 5/20/07, Ray Lee <[email protected]> wrote:
On 5/19/07, Al Viro <[email protected]> wrote:
> On Sat, May 19, 2007 at 11:16:59PM -0700, Ray Lee wrote:
> > Ken? Ball's in your court. As the patch isn't providing a killer
> > feature for 2.6.22, I'd suggest just reverting it for now until the
> > issues are ironed out.
>
> Hold it. The real question here is which logics do we want there.
> IOW, and how many device nodes do we want to appear and _when_ do
> we want them to appear?
The when part is what looks to make it racy. I'm guessing that we're
relying on udev to create those loop nodes. If so, I think any scheme
that creates more on demand would give transient mount errors while
it's waiting on udev to create more nodes.
Perhaps if we were to start with 8 loop nodes at init (as we have in
2.6.21), and then always maintain a margin of 8 (or 4, or...) when
they start being used or detached?
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Until the tools can request dynamic loop device allocation from the
kernel before they want to use the device, you can create as many as
needed "static" loop* nodes in /lib/udev/devices/, which will be
copied to /dev/ early on every bootup.
Kay
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