Re: Linux 2.3.31 bug using large memory

Nagy Tibor (nagyt@otpbank.hu)
Fri, 10 Dec 1999 09:09:02 +0100

Lincoln Dale wrote:
>
> Nagy,
>
> i believe this to be normal behaviour.
>
> applications that use brk()/sbrk() can only allocate up to ~730mb.
> for a single application to use more memory, it needs to allocate memory
> using something like mmap().
>
> take a look at how dlmalloc works - and see what happens.
>
> cheers,
>
> lincoln.

Hi Lincoln,

may be, you are right. Really after consuming about 700-800M the system
crashes.

I must note, that the 2.2.1[123] kernel hes been working well with 2GB
memory for a long time.

Tibor
>
> At 10:06 09/12/99 +0100, Nagy Tibor wrote:
> >[1.] One line summary of the problem:
> >
> >The Linux kernel crashes using a lot of of memory.
> >
> >[2.] Full description of the problem/report:
> >
> >On a Dell PowerEdge 6300 (4 CPU Xeon 550 MHz 4 GB RAM) the kernel is not
> >able to allocate more memory after passing a certain amonunt of
> >memory.
> >This results, that no more processes can be started:
> > fork: Cannot allocate memory.
> ..
> >The output of the vmstat at crashing:
> >
> > 0 1 0 0 3273564 634264 30204 0 0 19062 0 409 610
> > 0 4 96
> > 0 1 0 0 3252320 653080 30204 0 0 18816 0 405 612
> > 0 4 96
> > 0 1 0 0 3230800 672140 30204 0 0 19062 0 403 610
> > 0 9 91
> > 0 1 0 0 3209480 691024 30204 0 0 18882 0 402 611
> > 0 7 93
> > 0 1 0 0 3188096 709964 30204 0 0 19004 0 405 612
> > 0 7 93
> > 0 1 0 0 3166644 728964 30204 0 0 18938 0 405 611
> > 0 8 92
> >/proc: Cannot allocate memory

-- 
------------------------------------------------------------------------
Tibor Nagy
Director of Card and Core Banking Systems Development Project
National Savings and Commercial Bank Ltd (OTP Bank)
H-1051 Budapest Nador u. 16.
Tel: 00 36 1 374 6990	Fax: 00 36 1 374 6981	E-mail: nagyt@otpbank.hu
------------------------------------------------------------------------


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/