> -----Original Message----- > From: Dave Hansen [mailto:dave.hansen@xxxxxxxxx] > Sent: Tuesday, July 23, 2013 11:28 AM > To: KY Srinivasan > Cc: Michal Hocko; gregkh@xxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; > devel@xxxxxxxxxxxxxxxxxxxxxx; olaf@xxxxxxxxx; apw@xxxxxxxxxxxxx; > andi@xxxxxxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx; linux-mm@xxxxxxxxx; > kamezawa.hiroyuki@xxxxxxxxx; hannes@xxxxxxxxxxx; yinghan@xxxxxxxxxx; > jasowang@xxxxxxxxxx; kay@xxxxxxxx > Subject: Re: [PATCH 1/1] Drivers: base: memory: Export symbols for onlining > memory blocks > > On 07/23/2013 07:52 AM, KY Srinivasan wrote: > > The current scheme of involving user > > level code to close this loop obviously does not perform well under high > memory pressure. > > Adding memory usually requires allocating some large, contiguous areas > of memory for use as mem_map[] and other VM structures. That's really > hard to do under heavy memory pressure. How are you accomplishing this? I cannot avoid failures because of lack of memory. In this case I notify the host of the failure and also tag the failure as transient. Host retries the operation after some delay. There is no guarantee it will succeed though. K. Y > > > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href