[PATCH V2 1/4] arm: mvebu: increase atomic coherent pool size for armada 370/XP
smoch at web.de
Tue Nov 6 16:28:45 EST 2012
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
Oct 19 00:41:22 guru kernel: Please increase it with coherent_pool=
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 already sent this bug report to m.szyprowski and
Sebastian suggested to send it to the mailing list and the responsible
Please write to my e-mail directly if you have further questions or
patches for me to test.
More information about the linux-arm-kernel