Messages in this thread | | | Date | Tue, 12 Aug 2008 04:36:03 -0700 | From | Arjan van de Ven <> | Subject | Re: [patch 1/2] fastboot: Add a module parameter to skip probing of specific ports |
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On Tue, 12 Aug 2008 08:39:03 +0100 Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Mon, 11 Aug 2008 15:36:41 -0700 > Arjan van de Ven <arjan@infradead.org> wrote: > > > > > From: Kristen Accardi <kristen.c.accardi@intel.com> > > Subject: [PATCH] libata: Add a module parameter to skip probing of > > specific ports > > > > Port probing by libata can easily take 10% or more of the kernel > > boot time (2%+ of total). For cases where one knows there is nothing > > connected to certain ports (for example on netbooks) this is a waste > > of boot time. > > > > This patch adds a module parameter that allows the admin to specify > > to skip ports (specified by a bitmask) and recoup this boot time. > > This capability is potentially also useful to get systems to boot > > for cases where port-probing on a certain ports causes crashes. > > > > A follow-on patch will add the capability to use DMI identification > > to automate this for certain known systems. > > What happens if I plug in an additional libata using device ?
on an eeepc ? ;)
at least for the command line option the owner (or whoever sets up grub) knows the order and could adjust. For the DMI patch you do have a point.
> What > defines the probe order here particularly as people are pushing for > parallel probing of multiple devices.
the patches I'm pushing for this don't change probe order; that has been tried before and wasn't a great success.
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