Messages in this thread | | | Date | Fri, 27 Oct 2006 23:09:05 -0600 | From | Grant Grundler <> | Subject | Re: [patch] drivers: wait for threaded probes between initcall levels |
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On Fri, Oct 27, 2006 at 04:06:26PM -0700, Andrew Morton wrote: > On Fri, 27 Oct 2006 23:59:30 +0100 > Alan Cox <alan@lxorguk.ukuu.org.uk> wrote: > > > Ar Gwe, 2006-10-27 am 11:42 -0700, ysgrifennodd Andrew Morton: > > > IOW, we want to be multithreaded _within_ an initcall level, but not between > > > different levels. > > > > Thats actually insufficient. We have link ordered init sequences in > > large numbers of driver subtrees (ATA, watchdog, etc). We'll need > > several more initcall layers to fix that. > > > > It would be nice to express those dependencies in some clearer and less > fragile manner than link order. I guess finer-grained initcall levels > would do that, but it doesn't scale very well.
Would making use of depmod data be a step in the right direction? ie nic driver calls extern function (e.g. pci_enable_device()) and therefore must depend on module which provides that function.
My guess is this probably isn't 100% sufficient to replace all initcall levels. But likely sufficient within a given initcall level. My main concern are circular dependencies (which are rare).
> But whatever. I think multithreaded probing just doesn't pass the > benefit-versus-hassle test, sorry. Make it dependent on CONFIG_GREGKH ;)
Isn't already? :)
I thought parallel PCI and SCSI probing on system with multiple NICs and "SCSI" storage requires udev to create devices with consistent naming.
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