Hi David,
Le 30/03/2016 03:50, David Sterba a écrit : > On Tue, Mar 29, 2016 at 07:04:10PM -1000, Jean-Denis Girard wrote: >> >> [ 3734.651439] btrfs: page allocation failure: order:4, mode:0x2404040 > > Order 4 is 64k, and most probably it's the allocation of a nodesize, the > IP offset in the function is close to beginning, there are two other > allocations that are served from the slab. > > So do you have a filesystem with a 64k nodesize? Just checking. Yes, I do. Both the main filesystem and the backup filesystem were created with btrfs -4.4 using: mkfs.btrfs --nodesize 64K ... > The memory is fragmented so a contiguous 64k cannot be found, what we > can do is a fallback to vmalloc, that can assemble th 64k memory from > smaller pages. I'll send a patch. Great! Thanks, -- Jean-Denis Girard SysNux Systèmes Linux en Polynésie française http://www.sysnux.pf/ Tél: +689 40.50.10.40 / GSM: +689 87.79.75.27
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