Re: Estrange behaviour of pre9-1

[Roger Larsson <roger.larsson@norran.net>]

Linus Torvalds wrote:
> 
> On 16 May 2000, Juan J. Quintela wrote:
> > Hi
> >
> > linus> That is indeed what my shink_mmap() suggested change does (ie make
> > linus> "sync_page_buffers()" wait for old locked buffers).
> >
> > But your change wait for *all* locked buffers, I want to start several
> > writes asynchronously and then wait for one of them.
> 
> This is pretty much exactly what my change does - no need to be
> excessively clever.
> 
> Remember, we walk the LRU list from the "old" end, and whenever we hita
> dirty buffer we will write it out asynchronously. AND WE WILL MOVE IT TO
> THE TOP OF THE LRU QUEUE!
> 

Not in my recently released patch [Improved LRU shrink_mmap...].
It keeps the dirty (to be cleaned) pages in the old end.
I do not scan for dirty pages but it can easily be added - tonight.

/RogerL

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