Re: Unresponiveness of 2.4.16

[Andrew Morton]

Andreas Dilger wrote:
> 
> On Nov 28, 2001  12:31 -0800, Andrew Morton wrote:
> > write-cluster.patch
> >       ext2 metadata prereading and various other hacks which
> >       prevent writes from stumbling over reads, and thus ruining
> >       write clustering.  This patch is in the early prototype stage
> 
> Shouldn't the ext2_inode_preread() code use "ll_rw_block(READ_AHEAD,...)"
> just to be proper?
> 

Yes, especially now the request queues are shorter than they have
historically been.  READA also needs to be propagated through the
pagecache readhead, which may prove tricky.

But so little code is actually using READA at this stage that I didn't
bother - I first need to go through those paths and make sure that they
are in fact complete, working and useful...

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