At 10/20/2012 02:33 AM, KOSAKI Motohiro Wrote: >> I think it again, and found that this check is necessary. Because we only >> lock memory hotplug when offlining pages. Here is the steps to offline and >> remove memory: >> >> 1. lock memory hotplug >> 2. offline a memory section >> 3. unlock memory hotplug >> 4. repeat 1-3 to offline all memory sections >> 5. lock memory hotplug >> 6. remove memory >> 7. unlock memory hotplug >> >> All memory sections must be offlined before removing memory. But we don't >> hold >> the lock in the whole operation. So we should check whether all memory >> sections >> are offlined before step6. > > You should describe the race scenario in the patch description. OK? >
OK Thanks Wen Congyang _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
