Messages in this thread | | | From | Yuhong Bao <> | Subject | RE: [RFC][PATCH] Cross Memory Attach | Date | Sun, 19 Sep 2010 12:20:59 -0700 |
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(Adding Russell King of ARM Linux to CC list)
---------------------------------------- > From: torvalds@linux-foundation.org > Date: Thu, 16 Sep 2010 10:54:29 -0700 > Subject: Re: [RFC][PATCH] Cross Memory Attach > To: peterz@infradead.org > CC: cyeoh@au1.ibm.com; linux-kernel@vger.kernel.org > > On Thu, Sep 16, 2010 at 10:47 AM, Peter Zijlstra wrote: > > On Thu, 2010-09-16 at 10:34 -0700, Linus Torvalds wrote: > >> > >> Of course, these days I would seriously suggest against trying to > >> optimize the kmap() case. It only matters on crap hardware these days. > >> Anybody running HIGHMEM in 2010 and thinks that it makes sense > >> deserves the pain the get. We should not complicate the kernel further > >> for it, and sane architectures will have a no-op kmap(). > > > > OK, fully agreed. Someone ought to tell ARM though :-) > > You know what? I don't care. If the fact that ARM is messing up means > that they will never be able to do well in the micro-server space, > that's _their_ problem. > > I fought HIGHMEM tooth and nail when it appeared originally. I lost, > because we really didn't have any choice. But there is no way I'm > going to say "oh, HIGHMEM still makes sense in 2010 because the ARM > guys are now making all the same mistakes Intel did in 1992". Because > these days we _do_ have a choice. > > And all the rumors are that there will be a 64-bit ARM too. So their > PAE mess will be out before, but nobody sane should really consider it > a primary issue. It will work, but it will work suboptimally. That's > what you get when you have bad hardware design. > > Linus > -- > 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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