On 02/03/2014 08:45 AM, Joonsoo Kim wrote:
On Wed, Jan 29, 2014 at 05:52:41PM +0100, Vlastimil Babka wrote:
On 01/10/2014 09:48 AM, Joonsoo Kim wrote:
On Thu, Jan 09, 2014 at 09:27:20AM +, Mel Gorman wrote:
On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
Hello,
I found some
On Wed, Jan 29, 2014 at 05:52:41PM +0100, Vlastimil Babka wrote:
> On 01/10/2014 09:48 AM, Joonsoo Kim wrote:
> >On Thu, Jan 09, 2014 at 09:27:20AM +, Mel Gorman wrote:
> >>On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
> >>>Hello,
> >>>
> >>>I found some weaknesses on handling mi
On Wed, Jan 29, 2014 at 05:52:41PM +0100, Vlastimil Babka wrote:
> On 01/10/2014 09:48 AM, Joonsoo Kim wrote:
> >On Thu, Jan 09, 2014 at 09:27:20AM +, Mel Gorman wrote:
> >>On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
> >>>Hello,
> >>>
> >>>I found some weaknesses on handling mi
On 01/10/2014 09:48 AM, Joonsoo Kim wrote:
On Thu, Jan 09, 2014 at 09:27:20AM +, Mel Gorman wrote:
On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
Hello,
I found some weaknesses on handling migratetype during code review and
testing CMA.
First, we don't have any synchronizati
On Fri, Jan 10, 2014 at 09:48:34AM +, Mel Gorman wrote:
> On Fri, Jan 10, 2014 at 05:48:55PM +0900, Joonsoo Kim wrote:
> > On Thu, Jan 09, 2014 at 09:27:20AM +, Mel Gorman wrote:
> > > On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
> > > > Hello,
> > > >
> > > > I found some
On Fri, Jan 10, 2014 at 05:48:55PM +0900, Joonsoo Kim wrote:
> On Thu, Jan 09, 2014 at 09:27:20AM +, Mel Gorman wrote:
> > On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
> > > Hello,
> > >
> > > I found some weaknesses on handling migratetype during code review and
> > > testing
On Thu, Jan 09, 2014 at 09:27:20AM +, Mel Gorman wrote:
> On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
> > Hello,
> >
> > I found some weaknesses on handling migratetype during code review and
> > testing CMA.
> >
> > First, we don't have any synchronization method on get/set
2014/1/9 Michal Nazarewicz :
> On Thu, Jan 09 2014, Joonsoo Kim wrote:
>> Third, there is the problem on buddy allocator. It doesn't consider
>> migratetype when merging buddy, so pages from cma or isolate region can
>> be moved to other migratetype freelist. It makes CMA failed over and over.
>>
On Thu, Jan 09, 2014 at 04:04:40PM +0900, Joonsoo Kim wrote:
> Hello,
>
> I found some weaknesses on handling migratetype during code review and
> testing CMA.
>
> First, we don't have any synchronization method on get/set pageblock
> migratetype. When we change migratetype, we hold the zone lock
On Thu, Jan 09 2014, Joonsoo Kim wrote:
> Third, there is the problem on buddy allocator. It doesn't consider
> migratetype when merging buddy, so pages from cma or isolate region can
> be moved to other migratetype freelist. It makes CMA failed over and over.
> To prevent it, the buddy allocator
Hello,
I found some weaknesses on handling migratetype during code review and
testing CMA.
First, we don't have any synchronization method on get/set pageblock
migratetype. When we change migratetype, we hold the zone lock. So
writer-writer race doesn't exist. But while someone changes migratetyp
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