On Wed, 08 Feb 2012 03:04:18 +0100, sandeep patil <psandeep.s@xxxxxxxxx> wrote:
There's another problem I am facing with zone watermarks and CMA. Test details: Memory : 480 MB of total memory, 128 MB CMA region Test case : around 600 MB of file transfer over USB RNDIS onto target System Load : ftpd with console running on target. No one is doing CMA allocations except for the DMA allocations done by the drivers. Result : After about 300MB transfer, I start getting GFP_ATOMIC allocation failures. This only happens if CMA region is reserved.
[...]
Total memory available is way above the zone watermarks. So, we ended up starving UNMOVABLE/RECLAIMABLE atomic allocations that cannot fallback on CMA region.
This looks like something Mel warned me about. I don't really have a good solution for that yet. ;/ -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +----<email/xmpp: mpn@xxxxxxxxxx>--------------ooO--(_)--Ooo-- -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
