On Feb 16, 2009, at 4:35 PM, M. Warner Losh wrote:
In message: <[email protected]>
Marcel Moolenaar <[email protected]> writes:
:
: On Feb 16, 2009, at 3:13 PM, M. Warner Losh wrote:
:
: > In message: <[email protected]>
: > Marcel Moolenaar <[email protected]> writes:
: > : Before I dig into the code, what's the current status of
: > : root mounts on USB mass storage devices?
: >
: > First, there's a kludge-o-round that is similar to your "sleep 10"
: > that you've added. It loops waiting for more devices to show up
if
: > the desired root file system hasn't appeared yet.
: >
: > There's no way for hot-plug busses to tell the kernel "I've
tried my
: > best to enumerate everything on my bus, and I'm done"
:
: Of course there is. Any and all USB hubs have a certain
: number of ports. You can trivially iterate over all of
: them and declare completion when you've tried them all.
The hot-plug busses know. The mountroot code doesn't have a way to
wait for the hot-plug busses.
Huh?
root_mount_hold() and root_mount_rel() are specifically
designed to inform the mountroot code that it needs to
wait (or that it should go ahead and mount root).
--
Marcel Moolenaar
[email protected]
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