Yasuaki Ishimatsu hit a allocation failure bug when the numa mapping between CPU and node is changed. This was the last scene: SLUB: Unable to allocate memory on node 2 (gfp=0x80d0) cache: kmalloc-192, object size: 192, buffer size: 192, default order: 1, min order: 0 node 0: slabs: 6172, objs: 259224, free: 245741 node 1: slabs: 3261, objs: 136962, free: 127656
I and Yasuaki have a host which has a feature of node hotplug, this is a fix by me. Tested several patterns of hotplug and I found no issue, now. Of course I read Lai's patch and Tejun's comment. I hope I could reflect them. 1/4 ... add node-hotplug event callback. 2/4 ... add a sanity check (for debug) 3/4 ... remove per-node unbound workqueue if node goes offline. 4/4 ... update per-cpu pool's information and cpumasks, node information based on the latest (cpu, node) information. Thanks, -Kame -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/