Re: jemalloc SEGV problem

[Channa <channa.kad%gmail.com@localhost>]

Hi,
Ya i understand but when i changed the pagesize to 64K in mips arch
 and retained the macro CHUNK_2POW_DEFAULT as present in jemalloc.c
original file.I dint get any seg fault.

But when i changed the pagesize again to 4K i got SEGV.

Regards,
Channa


2008/11/14 Christos Zoulas <christos%zoulas.com@localhost>:
> On Nov 14, 12:30pm, channa.kad%gmail.com@localhost (Channa) wrote:
> -- Subject: Re: jemalloc SEGV problem
>
> | Hi,
> | Yes in understand i have not changed any arch specific macros.
> | I have one small question
> | In my system the pagesize is 4K so the change to the macro
> |
> | #define CHUNK_2POW_DEFAULT 20  <---- As in Original jemalloc.c
> |
> | to
> |
> | #define CHUNK_2POW_DEFAULT 12  <---- As in my environment
> |
> | is relevant?
> | Do you any comments on it??
>
> The pagesize is 4K on i386 and it uses CHUNK_2POW_DEFAULT 20. I don't
> see how those are related the comment for CHUNK_2POW_DEFAULT is:
>
>  * Size and alignment of memory chunks that are allocated by the OS's virtual
>  * memory system.
>
> Which is not necessarily the pagesize. I think that what's happening here
> is that during initialization some computed value overflows, so you end
> up trying to allocate or access something you cannot so it fails.
>
> christos
>