Re: [rfc] approach to pull writepage out of reclaim

[Christoph Lameter <cl@linux-foundation.org>]

Matthew Wilcox wrote:
> On Thu, Oct 09, 2008 at 12:06:15PM -0500, Christoph Lameter wrote:
>> Nick Piggin wrote:
>>
>>> So. Firstly, what I'm looking at is doing swap writeout from pdflush. This
>>> patch does that (working in concept, but pdflush and background writeout
>>> from dirty inode list isn't really up to the task, might scrap it and do the
>>> writeout from kswap). But writeout from radix-tree should actually be able to
>>> give better swapout pattern than LRU writepage as well.
>> Patch is missing from the message.
> 
> It's no longer acceptable to post descriptions of what you're about to
> do?  You have to invest lots of time into creating a patch and testing that
> it works before posting it (only to have it shot down because someone
> disagrees with the design of your solution)?  Really?

The text says that a patch was included.... So I was expecting it....

But the problem you mention is real. Tried numerous times to get a conceptual
discussion going without a patch. Usually that does not lead to anything.