Jesse Brandeburg wrote:
On 10/23/05, Robert Hancock <[email protected]> wrote:
John Bäckstrand wrote:
Im seeing a massive amount of page allocation failures with 2.6.14-rc5,
and also earlier kernels, see "E1000 - page allocation failure - saga
[snip]
It looks like you have enough memory free - the problem is that the
driver is allocating a block of memory with order 3, which is 8 pages.
Quite likely there are not enough contiguous free pages to satisfy that.
That's an awful big buffer size for a packet - I assume you're using
jumbo frames or something? Ideally the driver and hardware should be
able to allocate a buffer for those packets in multiple chunks, but I
have no idea if this is possible.
the latest e1000 driver (6.2.15) from http://sf.net/projects/e1000
fixes this by using multiple descriptors for jumbo frames, therefore
only doing order 0 (single page) page allocations.
let us know how it goes.
BTW why is this so much more common with recent kernels?
I don't know why it's more common, but I agree that it seems so. I have
speculated that it may be related to 4k stack, but I can't even generate
a credible wild-ass guess on that, much less find any evidence, so I
doubt that's much if any correlation.
Getting memory a page at a time is ugly, but it will probably work just
fine.
--
-bill davidsen ([email protected])
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me
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