Re: journaling & VM (was: Re: reiserfs being part of the kernel: it'snot just the code)

Hi,

On Wed, Jun 07, 2000 at 06:40:24AM -0700, Chris Mason wrote:

Right now, almost of the pinned pages will be buffer cache pages, and only
metadata is logged.  But, sometimes a data block must be flushed before
transaction commit, and those pages are pinned, but can be written at any
time.  I'm not sure I fully understand the issues with doing all the
balancing through the page cache...

In 2.4, it's not a problem in principle to keep the buffer cache pages
on the page cache LRUs, even if they are not on the page cache hash 
lists.

Allocate on flush will be different, and the address_space->pressure()
method makes even more sense there.  Those pages will be on the LRU lists,
and you want the pressure function to be called on each page.

Absolutely.

Cheers,
 Stephen
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