On Sun 01-10-17 12:26:47, Pavel Machek wrote: > Hi! > > > I inserted u-SD card, only to realize that it is not detected as it > > should be. And dmesg indeed reveals: > > Tetsuo asked me to report this to linux-mm. > > But 2^4 is 16 pages, IIRC that can't be expected to work reliably, and > thus this sounds like MMC bug, not mm bug.
Well, I cannot comment on why MMC needs such a large allocation and whether it can safely fall back to vmalloc but __GFP_RETRY_MAYFAIL might help to try harder and require compaction to do more work. Relying on that for correctness is, of course, a different story and a very unreliable under memory pressure or long term fragmented memory. -- Michal Hocko SUSE Labs
