On Thu, 2008-05-01 at 21:23 +0100, Martin Habets wrote:
> The fixed address passed to mmap() should be aligned to the value of SHMLBA
> as defined in sys/shm.h.
> See Documentation/cachetlb.txt in the kernel for the explanation behind this.
> On most architectures this value is the page size, but not on all.
>
> Regards,
> Martin
>
> Signed-off-by: Martin Habets <[EMAIL PROTECTED]>
Thanks for pointing that out. Both shmt09 and mmap01 patches has been
applied.
Regards--
Subrata
>
> Index: ltp/testcases/kernel/syscalls/mmap/mmap01.c
> ===================================================================
> --- ltp.orig/testcases/kernel/syscalls/mmap/mmap01.c 2008-05-01
> 21:03:51.000000000 +0100
> +++ ltp/testcases/kernel/syscalls/mmap/mmap01.c 2008-05-01
> 21:10:45.000000000 +0100
> @@ -81,6 +81,7 @@
> #include <stdint.h>
> #include <sys/stat.h>
> #include <sys/mman.h>
> +#include <sys/shm.h>
>
> #include "test.h"
> #include "usctest.h"
> @@ -267,14 +268,16 @@
> }
>
> /*
> - * Initialize addr to align with the first page boundary above the
> - * break address of the process.
> + * Initialize addr to align with the first segment boundary address
> + * above the break address of the process.
> */
> - addr = (void *) (((intptr_t)sbrk(0) + (page_sz - 1)) & ~(page_sz - 1));
> + addr = (void *) (((intptr_t)sbrk(0) + (SHMLBA - 1)) & ~(SHMLBA - 1));
>
> - /* Increase the break address of the process by 2 page size bytes */
> - if ((intptr_t)sbrk(2 * page_sz) == -1) {
> - tst_brkm(TFAIL, cleanup, "sbrk(2 * page_sz) failed");
> + /* Set the break address of the process to the addr plus one
> + * page size.
> + */
> + if ((intptr_t)sbrk(SHMLBA + page_sz) == -1) {
> + tst_brkm(TFAIL, cleanup, "sbrk(SHMLBA + page_sz) failed");
> }
>
> /* Initialize one page region from addr with 'A' */
>
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