On Wed, Sep 12, 2012 at 07:16:28AM +0200, Eric Dumazet wrote: > On Tue, 2012-09-11 at 16:25 -0700, Andrew Morton wrote: > > > Asking for a 256k allocation is pretty crazy - this is an operating > > system kernel, not a userspace application. > > > > I'm wondering if this is due to a recent change, but I'm having trouble > > working out where the allocation call site is. > > -- > > (Adding Marc Merlin to CC, since he reported same problem) > > Thats the firmware loading in iwlwifi driver. Not sure if it can use SG. > > drivers/net/wireless/iwlwifi/iwl-drv.c > > iwl_alloc_ucode() -> iwl_alloc_fw_desc() -> dma_alloc_coherent() > > It seems some sections of /lib/firmware/iwlwifi*.ucode files are above > 128 Kbytes, so dma_alloc_coherent() try order-5 allocations Thanks for looping me in, yes, this looks very familiar to me :) In the other thread, Johannes Berg gave me this patch which is supposed to help: http://p.sipsolutions.net/11ea33b376a5bac5.txt Unfortunately due to very long work days, I haven't had the time to try it out yet, but I will soon. Would that help in this case too? And to answer David Rientjes, I also have compaction on: gandalfthegreat:~# zgrep CONFIG_COMPACTION /proc/config.gz CONFIG_COMPACTION=y Full config: http://marc.merlins.org/tmp/config-3.5.2-amd64-preempt-noide-20120731 If that helps for comparison, my thread is here: http://www.spinics.net/lists/linux-wireless/msg96438.html Thanks, Marc -- "A mouse is a device used to point at the xterm you want to type in" - A.S.R. Microsoft is to operating systems .... .... what McDonalds is to gourmet cooking Home page: http://marc.merlins.org/ -- 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=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>