Re: sata badness in 2.6.20-rc1? [Was: Re: md patches in -mm]

[Jeff Garzik]

Alan wrote:
> On Fri, 15 Dec 2006 13:39:27 -0800
> Andrew Morton <akpm@xxxxxxxx> wrote:
>
> > On Fri, 15 Dec 2006 13:05:52 -0800
> > Andrew Morton <akpm@xxxxxxxx> wrote:
> >
> > > Jeff, I shall send all the sata patches which I have at you one single time
> > > and I shall then drop the lot.  So please don't flub them.
> > >
> > > I'll then do a rc1-mm2 without them.
> > hm, this is looking like a lot of work for not much gain.  Rafael, are
> > you able to do a quick chop and tell us whether these:
>
> The md one and the long history of reports about parallel I/O causing
> problems sounds a lot more like the kmap stuff you were worried about
> Andrew. I'd be very intereste dto know if it happens on x86_32 built with
> a standard memory split and no highmem....

2.6.20-rc1 works, and 2.6.20-rc1 does not have the kmap_atomic() fix.

Upstream does kmap_atomic(KM_USER0) and -mm does kmap_atomic(KM_IRQ0)

	Jeff



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