Re: writeback list

["Stephen C. Tweedie" <sct@redhat.com>]

Hi,

On Thu, Jul 13, 2000 at 04:30:35PM -0300, Rik van Riel wrote:
> 
> we may have forgotten something in our new new vm design from
> last weekend. While we have the list head available to put
> pages in the writeback list, we don't have an entry in to put
> the timestamp of the write in struct_page...

It shouldn't matter.  Just assume something like the 30-second sync.
You can keep placeholders in the list for that, or even do something
like have multiple lists, one for the current 30-seconds being synced,
one for the next sync.  You can do the same for 5-second metadata
syncs too if you want; just use separate lists.  It perturbs the LRU a
bit, but then we also have page aging so that's not too bad.  (Are you
planning on using the age values in the inactive list, btw?)

Cheers,
 Stephen
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