lkml.org 
[lkml]   [2005]   [Dec]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 02/12] mm: supporting variables and functions for balanced zone aging
On Fri, Dec 02, 2005 at 03:18:11AM +0100, Andrea Arcangeli wrote:
> On Fri, Dec 02, 2005 at 10:04:07AM +0800, Wu Fengguang wrote:
> > btw, maybe it's time to lower the low_mem_reserve.
> > There should be no need to keep ~50M free memory with the balancing patch.
>
> low_mem_reserve is indipendent from shrink_cache, because shrink_cache can't
> free unfreeable pinned memory.
>
> If you want to remove low_mem_reserve you'd better start by adding
> migration of memory across the zones with pte updates etc... That would
> at least mitigate the effect of anonymous memory w/o swap. But
> low_mem_reserve is still needed for all other kind of allocations like
> kmalloc or pci_alloc_consistent (i.e. not relocatable) etc...

Thanks for the clarification, I was concerning too much ;)

Regards,
Wu
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-12-02 03:39    [W:0.097 / U:0.636 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site