Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed, Jun 14, 2017 at 11:24:38AM +0200, Michal Hocko wrote: >On Wed 14-06-17 17:12:06, Wei Yang wrote: >> On Wed, Jun 14, 2017 at 08:32:06AM +0200, Michal Hocko wrote: >> >On Wed 14-06-17 14:12:59, Wei Yang wrote: >> >[...] >> >> Hi, Michal >> >> >> >> Not sure you missed this one or you think

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed, Jun 14, 2017 at 11:24:38AM +0200, Michal Hocko wrote: >On Wed 14-06-17 17:12:06, Wei Yang wrote: >> On Wed, Jun 14, 2017 at 08:32:06AM +0200, Michal Hocko wrote: >> >On Wed 14-06-17 14:12:59, Wei Yang wrote: >> >[...] >> >> Hi, Michal >> >> >> >> Not sure you missed this one or you think

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed 14-06-17 17:12:06, Wei Yang wrote: > On Wed, Jun 14, 2017 at 08:32:06AM +0200, Michal Hocko wrote: > >On Wed 14-06-17 14:12:59, Wei Yang wrote: > >[...] > >> Hi, Michal > >> > >> Not sure you missed this one or you think this is fine. > >> > >> Hmm... this will not happen since we must

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed 14-06-17 17:12:06, Wei Yang wrote: > On Wed, Jun 14, 2017 at 08:32:06AM +0200, Michal Hocko wrote: > >On Wed 14-06-17 14:12:59, Wei Yang wrote: > >[...] > >> Hi, Michal > >> > >> Not sure you missed this one or you think this is fine. > >> > >> Hmm... this will not happen since we must

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed, Jun 14, 2017 at 08:32:06AM +0200, Michal Hocko wrote: >On Wed 14-06-17 14:12:59, Wei Yang wrote: >[...] >> Hi, Michal >> >> Not sure you missed this one or you think this is fine. >> >> Hmm... this will not happen since we must offline a whole memory_block? > >yes > >> So the

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed, Jun 14, 2017 at 08:32:06AM +0200, Michal Hocko wrote: >On Wed 14-06-17 14:12:59, Wei Yang wrote: >[...] >> Hi, Michal >> >> Not sure you missed this one or you think this is fine. >> >> Hmm... this will not happen since we must offline a whole memory_block? > >yes > >> So the

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed 14-06-17 14:12:59, Wei Yang wrote: [...] > Hi, Michal > > Not sure you missed this one or you think this is fine. > > Hmm... this will not happen since we must offline a whole memory_block? yes > So the memory_hotplug/unplug unit is memory_block instead of mem_section? yes. -- Michal

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Wed 14-06-17 14:12:59, Wei Yang wrote: [...] > Hi, Michal > > Not sure you missed this one or you think this is fine. > > Hmm... this will not happen since we must offline a whole memory_block? yes > So the memory_hotplug/unplug unit is memory_block instead of mem_section? yes. -- Michal

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Mon, Jun 12, 2017 at 08:49:53AM +0200, Michal Hocko wrote: >On Sat 10-06-17 22:58:21, Wei Yang wrote: >> On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang wrote: >[...] >> > Hmm... one question about the memory_block behavior. >> > >> > In case one memory_block contains more

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Mon, Jun 12, 2017 at 08:49:53AM +0200, Michal Hocko wrote: >On Sat 10-06-17 22:58:21, Wei Yang wrote: >> On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang wrote: >[...] >> > Hmm... one question about the memory_block behavior. >> > >> > In case one memory_block contains more than one memory section.

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Sat, Jun 10, 2017 at 05:56:02PM +0800, Wei Yang wrote: >On Mon, May 15, 2017 at 4:58 PM, Michal Hocko wrote: >> From: Michal Hocko >> >> device memory hotplug hooks into regular memory hotplug only half way. >> It needs memory sections to track struct pages

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Sat, Jun 10, 2017 at 05:56:02PM +0800, Wei Yang wrote: >On Mon, May 15, 2017 at 4:58 PM, Michal Hocko wrote: >> From: Michal Hocko >> >> device memory hotplug hooks into regular memory hotplug only half way. >> It needs memory sections to track struct pages but there is no >> need/desire to

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Sat 10-06-17 22:58:21, Wei Yang wrote: > On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang wrote: [...] > > Hmm... one question about the memory_block behavior. > > > > In case one memory_block contains more than one memory section. > > If one section is "device zone", the

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Sat 10-06-17 22:58:21, Wei Yang wrote: > On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang wrote: [...] > > Hmm... one question about the memory_block behavior. > > > > In case one memory_block contains more than one memory section. > > If one section is "device zone", the whole memory_block is not

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang wrote: > On Mon, May 15, 2017 at 4:58 PM, Michal Hocko wrote: >> From: Michal Hocko >> >> device memory hotplug hooks into regular memory hotplug only half way. >> It needs memory sections

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Sat, Jun 10, 2017 at 5:56 PM, Wei Yang wrote: > On Mon, May 15, 2017 at 4:58 PM, Michal Hocko wrote: >> From: Michal Hocko >> >> device memory hotplug hooks into regular memory hotplug only half way. >> It needs memory sections to track struct pages but there is no >> need/desire to

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Mon, May 15, 2017 at 4:58 PM, Michal Hocko wrote: > From: Michal Hocko > > device memory hotplug hooks into regular memory hotplug only half way. > It needs memory sections to track struct pages but there is no > need/desire to associate those sections with

Re: [PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

On Mon, May 15, 2017 at 4:58 PM, Michal Hocko wrote: > From: Michal Hocko > > device memory hotplug hooks into regular memory hotplug only half way. > It needs memory sections to track struct pages but there is no > need/desire to associate those sections with memory blocks and export > them to

[PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

From: Michal Hocko device memory hotplug hooks into regular memory hotplug only half way. It needs memory sections to track struct pages but there is no need/desire to associate those sections with memory blocks and export them to the userspace via sysfs because they cannot be

[PATCH 04/14] mm, memory_hotplug: get rid of is_zone_device_section

From: Michal Hocko device memory hotplug hooks into regular memory hotplug only half way. It needs memory sections to track struct pages but there is no need/desire to associate those sections with memory blocks and export them to the userspace via sysfs because they cannot be onlined anyway.