Re: [patch] fs: improved handling of page and buffer IO errors

[Matthew Wilcox <matthew@wil.cx>]

On Wed, Oct 22, 2008 at 04:02:22PM +0200, Miklos Szeredi wrote:
> On Wed, 22 Oct 2008, Matthew Wilcox wrote:
> > On Wed, Oct 22, 2008 at 01:48:29PM +0100, Jamie Lokier wrote:
> > > Matthew Wilcox wrote:
> > > > Careful with those slurs you're throwing around.  PA-RISC carefully
> > > > aligns its mmaps so they are coherent.
> > > 
> > > (Unless you use MAP_FIXED?)
> > 
> > Doctor, it hurts when I point this gun at my foot and pull the trigger
> > ...
> 
> And remap_file_pages() also.  Neither that nor MAP_FIXED are widely
> used, but still, coherency is not a completely solved issue.

remap_file_pages() only hurts if you map the same page more than once
(which is permitted, but again, I don't think anyone actually does
that).

-- 
Matthew Wilcox				Intel Open Source Technology Centre
"Bill, look, we understand that you're interested in selling us this
operating system, but compare it to ours.  We can't possibly take such
a retrograde step."

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