Re: Buffer and Page cache coherent? was: Strange IDE performancechange in 2.6.1-rc1 (again)

[Andrew Morton]

Mike Fedyk <mfedyk@xxxxxxxxxxxxx> wrote:
>
> So in what way is the buffer cache coherent with the pagecache?
> 

There is no "buffer cache" in Linux.  There is a pagecache for /etc/passwd
and there is a pagecache for /dev/hda1.  They are treated pretty much
identically.  The kernel attaches buffer_heads to those pagecache pages
when needed - generally when it wants to deal with individual disk blocks.

>  Any progress on that pagecache coherent block relocation patch you had for
>  ext3? :)

No.
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