Re: [PATCH] mm: sort freelist by rank number

2020-08-19 Thread Pekka Enberg
Hi KyongHo and David, On 07.08.20 09:08, Pekka Enberg wrote: > > > I think having more knowledge of DRAM controller details in the OS > > > would be potentially beneficial for better page allocation policy, so > > > maybe try come up with something more generic, even if the fallback to > > > provi

Re: [PATCH] mm: sort freelist by rank number

2020-08-18 Thread Cho KyongHo
On Mon, Aug 10, 2020 at 09:32:18AM +0200, David Hildenbrand wrote: > On 07.08.20 09:08, Pekka Enberg wrote: > > Hi Cho and David, > > > > On Mon, Aug 3, 2020 at 10:57 AM David Hildenbrand wrote: > >> > >> On 03.08.20 08:10, pullip@samsung.com wrote: > >>> From: Cho KyongHo > >>> > >>> LPDDR5

Re: [PATCH] mm: sort freelist by rank number

2020-08-10 Thread David Hildenbrand
On 07.08.20 09:08, Pekka Enberg wrote: > Hi Cho and David, > > On Mon, Aug 3, 2020 at 10:57 AM David Hildenbrand wrote: >> >> On 03.08.20 08:10, pullip@samsung.com wrote: >>> From: Cho KyongHo >>> >>> LPDDR5 introduces rank switch delay. If three successive DRAM accesses >>> happens and the

Re: [PATCH] mm: sort freelist by rank number

2020-08-07 Thread Pekka Enberg
Hi Cho and David, On Mon, Aug 3, 2020 at 10:57 AM David Hildenbrand wrote: > > On 03.08.20 08:10, pullip@samsung.com wrote: > > From: Cho KyongHo > > > > LPDDR5 introduces rank switch delay. If three successive DRAM accesses > > happens and the first and the second ones access one rank and t

Re: [PATCH] mm: sort freelist by rank number

2020-08-04 Thread Cho KyongHo
On Tue, Aug 04, 2020 at 11:12:55AM +0200, Vlastimil Babka wrote: > On 8/4/20 4:35 AM, Cho KyongHo wrote: > > On Mon, Aug 03, 2020 at 05:45:55PM +0200, Vlastimil Babka wrote: > >> On 8/3/20 9:57 AM, David Hildenbrand wrote: > >> > On 03.08.20 08:10, pullip@samsung.com wrote: > >> >> From: Cho Ky

Re: [PATCH] mm: sort freelist by rank number

2020-08-04 Thread Vlastimil Babka
On 8/4/20 4:35 AM, Cho KyongHo wrote: > On Mon, Aug 03, 2020 at 05:45:55PM +0200, Vlastimil Babka wrote: >> On 8/3/20 9:57 AM, David Hildenbrand wrote: >> > On 03.08.20 08:10, pullip@samsung.com wrote: >> >> From: Cho KyongHo >> >> >> >> LPDDR5 introduces rank switch delay. If three successiv

Re: [PATCH] mm: sort freelist by rank number

2020-08-03 Thread Cho KyongHo
On Mon, Aug 03, 2020 at 05:45:55PM +0200, Vlastimil Babka wrote: > On 8/3/20 9:57 AM, David Hildenbrand wrote: > > On 03.08.20 08:10, pullip@samsung.com wrote: > >> From: Cho KyongHo > >> > >> LPDDR5 introduces rank switch delay. If three successive DRAM accesses > >> happens and the first an

Re: [PATCH] mm: sort freelist by rank number

2020-08-03 Thread Vlastimil Babka
On 8/3/20 9:57 AM, David Hildenbrand wrote: > On 03.08.20 08:10, pullip@samsung.com wrote: >> From: Cho KyongHo >> >> LPDDR5 introduces rank switch delay. If three successive DRAM accesses >> happens and the first and the second ones access one rank and the last >> access happens on the other

Re: [PATCH] mm: sort freelist by rank number

2020-08-03 Thread Cho KyongHo
Hi, On Mon, Aug 03, 2020 at 09:57:10AM +0200, David Hildenbrand wrote: > On 03.08.20 08:10, pullip@samsung.com wrote: > > From: Cho KyongHo > > > > LPDDR5 introduces rank switch delay. If three successive DRAM accesses > > happens and the first and the second ones access one rank and the las

Re: [PATCH] mm: sort freelist by rank number

2020-08-03 Thread David Hildenbrand
On 03.08.20 08:10, pullip@samsung.com wrote: > From: Cho KyongHo > > LPDDR5 introduces rank switch delay. If three successive DRAM accesses > happens and the first and the second ones access one rank and the last > access happens on the other rank, the latency of the last access will > be lon