Messages in this thread | | | Date | Wed, 08 Apr 2009 08:56:51 +0800 | From | Miao Xie <> | Subject | Re: [RFC][PATCH 0/3] cpuset,mm: fix memory spread bug |
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on 2009-4-8 5:04 Christoph Lameter wrote: > Interesting patch set but I cannot find parts 2 and 3. The locking changes > get rid of the generation scheme in cpusets which is a good thing if it > works right.
Sorry for the late reply and my mistake. The following URLs is the patches' address.
patch 1: restructure the function cpuset_update_task_memory_state() http://marc.info/?l=linux-kernel&m=123910183705576&w=2
patch 2: update tasks' page/slab spread flags in time http://marc.info/?l=linux-kernel&m=123910199505770&w=2
patch 3: update tasks' mems_allowed in time http://marc.info/?l=linux-mm&m=123910199605776&w=2
Thanks Miao
> > On Tue, 7 Apr 2009, Miao Xie wrote: > >> The kernel still allocated the page caches on old node after modifying its >> cpuset's mems when 'memory_spread_page' was set, or it didn't spread the page >> cache evenly over all the nodes that faulting task is allowed to usr after >> memory_spread_page was set. it is caused by the old mem_allowed and flags >> of the task, the current kernel doesn't updates them unless some function >> invokes cpuset_update_task_memory_state(), it is too late sometimes.We must >> update the mem_allowed and the flags of the tasks in time. >> >> Slab has the same problem. >> >> The following patches fix this bug by updating tasks' mem_allowed and spread >> flag after its cpuset's mems or spread flag is changed. >> >> patch 1: restructure the function cpuset_update_task_memory_state() >> patch 2: update tasks' page/slab spread flags in time >> patch 3: update tasks' mems_allowed in time >> >> >> -- >> To unsubscribe, send a message with 'unsubscribe linux-mm' in >> the body to majordomo@kvack.org. For more info on Linux MM, >> see: http://www.linux-mm.org/ . >> Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a> >> > > >
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