Re: Problem: Out of memory after 2days with 2GB RAM

["Zdenek Kabelac" <zdenek.kabelac@gmail.com>]

2008/6/12 Johannes Berg <johannes@sipsolutions.net>:
> On Thu, 2008-06-12 at 09:38 -0400, Rik van Riel wrote:
>> On Thu, 12 Jun 2008 12:07:34 +0200
>> "Zdenek Kabelac" <zdenek.kabelac@gmail.com> wrote:
>>
>> > It looks like while there was a huge amount of buffers and caches -
>> > system was unable to allocate few pages for kmalloc in iwl3945 driver
>> > after resume.
>>
>> It looks like this is because it wants to allocate 2**5 contiguous
>> pages, which is 128kB of contiguous kernel memory.
>
> 64-bit system I assume?
> The allocation should be 256 * 20 * sizeof(struct sk_buff *).
>
> Try the patch below. It should improve code generation too.

I'll surely try you patch - but is the iwl the only driver which needs
128kB continuous memory chunk?

I think that if the 128kB memchunks are exhausted in 2 days while
there is over 1GB of free RAM in buffers & caches I think some
defragmentation is needed then ?

btw: Does it really means that within those buffers kernel could not
find any adjacent 32 pages which could be made free ?

Zdenek