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SubjectRe: Linux 2.4.23-rc5
Hi!

I was investigating memory allocation problems on my systems.
And I only figured out that I'm using quite up-to-date kernel - 2.4.22.

This is my post from another thread:

> Vanilla 2.4.22 (this is x86) (with HZ=1024, if it does matter).
>
> after '# echo -1 >/proc/sys/vm/overcommit_memory'
> 1. test app with memory touch still gets killed by
> oom_killer. (so no malloc() == NULL)
> 2. test app w/o memory touch still can happily allocate 2.8GB
> of memory (x86 - looks like 3/1 memory split) and only then
> gets NULL pointer - oom_killer is silent.

"overcommit_memory < 0" supposed to not allow apps to overallocate
memory - but still it works not like it is said in
Documentation/filesystems/proc.txt.
So apps which try to be MM friendly can silently break due to
very-very lazy memory allocation in kernel. Not nice when malloc() says
"everything is fine!".

[ Just checked: with overcommit==-1, as soon app trying to touch
those magic 2.8GB of memory, it gets killed by oom_killer. This is
totally wrong... ]

Probably fix docs at least... :-(

Marcelo Tosatti wrote:
>
> Hi,
>
> Yet another thing showed up (possible data corruption on x86-64), so here
> goes -rc5.
>
>
> Summary of changes from v2.4.23-rc4 to v2.4.23-rc5
> ============================================
>
> Andi Kleen:
> o Fix 32bit truncate64 on x86-64
>
> Marcelo Tosatti:
> o Felix Radensky: Remove debugging printk from agpgart
> o Changed EXTRAVERSION to -rc5
>
>
>
> -
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