Messages in this thread | | | Date | Mon, 4 Dec 2017 13:33:56 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH v2 4/5] mm: memory_hotplug: Add memory hotremove probe device |
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On Mon 04-12-17 11:51:29, Andrea Reale wrote: > On Thu 30 Nov 2017, 15:49, Michal Hocko wrote: > > On Thu 23-11-17 11:14:52, Andrea Reale wrote: > > > Adding a "remove" sysfs handle that can be used to trigger > > > memory hotremove manually, exactly simmetrically with > > > what happens with the "probe" device for hot-add. > > > > > > This is usueful for architecture that do not rely on > > > ACPI for memory hot-remove. > > > > As already said elsewhere, this really has to check the online status of > > the range and fail some is still online. > > > > This is actually still done in remove_memory() (patch 2/5) with > walk_memory_range. We just return an error rather than BUGing(). > > Or are you referring to something else?
But you are not returning that error to the caller, are you?
[...] > > > + nid = memory_add_physaddr_to_nid(phys_addr); > > > + ret = lock_device_hotplug_sysfs(); > > > + if (ret) > > > + return ret; > > > + > > > + remove_memory(nid, phys_addr, > > > + MIN_MEMORY_BLOCK_SIZE * sections_per_block); > > > + unlock_device_hotplug(); > > > + return count;
-- Michal Hocko SUSE Labs
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