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
continues :(". Machine is a 1Ghz Athlon with 256MB RAM. Attached is
example dmesg output. The stack traces come in many variants. Killing
processes using RAM only seems to help temporarily. Ive also tried
setting vm.min_free_kbytes=16384, which used to work pretty well, but
this does not help (atleast not in the state the machine is currently
in, without rebooting).
free currently gives:
total used free shared buffers cached
Mem: 256520 239128 17392 0 5372 67500
-/+ buffers/cache: 166256 90264
Swap: 506036 21248 484788
I havent yet tried rebooting and using the vm.min_free_kbytes=16384 from
scratch, but I think something with the default for this is wrong if it
results in this many page allocation errors. The machine is serving
files from an encrypted partition with reiserfs on it, and I obivously
use the e1000 driver.
---
John Bäckstrand
------------------------------------------------------------------------
[149649.847890] kcryptd/0: page allocation failure. order:3, mode:0x20
..
[149649.849933] Free pages: 16148kB (0kB HighMem)
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.
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from [email protected]
Home Page: http://www.roberthancock.com/
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