Messages in this thread | | | Date | Mon, 25 Apr 2005 10:42:13 -0400 | From | William Park <> | Subject | Re: rootdelay |
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On Mon, Apr 25, 2005 at 11:45:59AM +0200, David N. Welton wrote: > Daniel Drake <dsd@gentoo.org> writes: > > [ Please CC replies to me - thanks! ] > > > Hi David, > > > David N. Welton wrote: > > > > [ Please CC replies to me, thanks! ] > > > > Hi, I was looking at your patch: > > > > http://lkml.org/lkml/2005/1/21/132 Very small, which is nice. I > > > > was wondering if there were any interest in my own efforts in that > > > direction: > > > > http://dedasys.com/freesoftware/patches/blkdev_wakeup.patch which > > > > is far more intrusive, and perhaps isn't good kernel programming > > > style, but, on the other hand, is the optimal solution in terms of > > > boot time because it wakes up the boot process right when the > > > device comes on line. Since I saw your patch included, it looks > > > like there is interest in this, and I'd toot my own horn once more > > > before just leaving my patch to the bit rot of the ages... > > > Thanks! > > > As simple as it may be, it's a bit of a shame that we actually need > > rootdelay as its something that the kernel should do > > automatically. At the time when we last discussed it, we didn't come > > up with a better (and safe) way to handle it, but I don't think we > > considered anything like your implementation. > > > I've CC'd a few people who were involved the last time around to see > > if they have any input for you. > > Thanks! I don't wish to be a pest, but not having heard a "no", I'll > send another ping out. Perhaps a simple description is better than > the patch for busy people: > > In init/do_mounts.c, mount_root does an interruptible_sleep_on a > wait queue, and goes on about its business after register_blkdev > in drivers/block/genhd.c does a wake_up_interruptible on it, so > that mounting the root device happens exactly when it needs to, no > sooner, no later, and doesn't depend on any fiddly timing issues.
Post your patch to the list, and I'll get it from a newsgroup.
-- William Park <opengeometry@yahoo.ca>, Toronto, Canada Slackware Linux -- because it works. - 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/
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