On Tue, Nov 06, 2012 at 10:28:45PM +0100, S?ren Moch wrote: > resent as plain text, sorry. > > > > For Armada 370/XP we have the same problem that for the commit > > cb01b63, so we applied the same solution: "The default 256 KiB > > coherent pool may be too small for some of the Kirkwood devices, so > > increase it to make sure that devices will be able to allocate their > > buffers with GFP_ATOMIC flag" > > I see a regression from linux-3.5 to linux-3.6 and think there might > be a fundamental problem > with this patch. On my Kirkwood system (guruplug server plus) with > linux-3.6.2 I see following > errors and corresponding malfunction even with further increased > (2M, 4M) pool size: > > Oct 19 00:41:22 guru kernel: ERROR: 4096 KiB atomic DMA coherent > pool is too small! > Oct 19 00:41:22 guru kernel: Please increase it with coherent_pool= > kernel parameter! > > So I had to downgrade to linux-3.5 which is running without problems. > > I use SATA and several DVB sticks (em28xx / drxk and dib0700).
I'm guess its the DVB sticks which are causing the problems. We have a number of kirkwood devices with two SATA devices which had problems until we extended the coherent_pool. The DVB sticks are probably take more coherent RAM. There was also an issue found recently: http://www.spinics.net/lists/arm-kernel/msg203962.html That conversation has gone quiet, but that could be because the participants are at ELCE. Andrew -- 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/
