commit [7db8889a: mm: have order > 0 compaction start off where it left]
introduced a caching mechanism to reduce the amount work the free page
scanner does in compaction. However, it has a problem. Consider two process
simultaneously scanning free pages
On Wed, Aug 08, 2012 at 08:08:44PM +0100, Mel Gorman wrote:
> commit [7db8889a: mm: have order > 0 compaction start off where it left]
> introduced a caching mechanism to reduce the amount work the free page
> scanner does in compaction. However, it has a problem. Consider two process
>
On Thu, Aug 09, 2012 at 09:23:28AM +0100, Mel Gorman wrote:
> On Thu, Aug 09, 2012 at 09:12:12AM +0900, Minchan Kim wrote:
> > >
> > >
> > > Second, it updates compact_cached_free_pfn in a more limited set of
> > > circumstances.
> > >
> > > If a scanner has wrapped, it updates
On Thu, Aug 09, 2012 at 09:12:12AM +0900, Minchan Kim wrote:
> >
> >
> > Second, it updates compact_cached_free_pfn in a more limited set of
> > circumstances.
> >
> > If a scanner has wrapped, it updates compact_cached_free_pfn to the end
> > of the zone. When a wrapped scanner isolates a
On Thu, Aug 09, 2012 at 09:12:12AM +0900, Minchan Kim wrote:
SNIP
Second, it updates compact_cached_free_pfn in a more limited set of
circumstances.
If a scanner has wrapped, it updates compact_cached_free_pfn to the end
of the zone. When a wrapped scanner isolates a page, it
On Thu, Aug 09, 2012 at 09:23:28AM +0100, Mel Gorman wrote:
On Thu, Aug 09, 2012 at 09:12:12AM +0900, Minchan Kim wrote:
SNIP
Second, it updates compact_cached_free_pfn in a more limited set of
circumstances.
If a scanner has wrapped, it updates compact_cached_free_pfn to the
On Wed, Aug 08, 2012 at 08:08:44PM +0100, Mel Gorman wrote:
commit [7db8889a: mm: have order 0 compaction start off where it left]
introduced a caching mechanism to reduce the amount work the free page
scanner does in compaction. However, it has a problem. Consider two process
simultaneously
commit [7db8889a: mm: have order 0 compaction start off where it left]
introduced a caching mechanism to reduce the amount work the free page
scanner does in compaction. However, it has a problem. Consider two process
simultaneously scanning free pages
Hi Mel,
On Wed, Aug 08, 2012 at 08:08:44PM +0100, Mel Gorman wrote:
> commit [7db8889a: mm: have order > 0 compaction start off where it left]
> introduced a caching mechanism to reduce the amount work the free page
> scanner does in compaction. However, it has a problem. Consider two process
>
commit [7db8889a: mm: have order > 0 compaction start off where it left]
introduced a caching mechanism to reduce the amount work the free page
scanner does in compaction. However, it has a problem. Consider two process
simultaneously scanning free pages
commit [7db8889a: mm: have order 0 compaction start off where it left]
introduced a caching mechanism to reduce the amount work the free page
scanner does in compaction. However, it has a problem. Consider two process
simultaneously scanning free pages
Hi Mel,
On Wed, Aug 08, 2012 at 08:08:44PM +0100, Mel Gorman wrote:
commit [7db8889a: mm: have order 0 compaction start off where it left]
introduced a caching mechanism to reduce the amount work the free page
scanner does in compaction. However, it has a problem. Consider two process
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