Hi
On 11/03/2009 05:17 PM, Sharyathi Nagesh wrote:
> Hi
> We observed that LTP test cases are failing when run on some of
> the distros
>
> Problem Statement:
>
> I observed that test cases mbind01.c and get_mempolicy01.c are
> failing during call to get_mempolicy() with error -EINVAL.
> In the kernel code the error comes from
> ----------------------------------------------------------------
>
> SYSCALL_DEFINE5(get_mempolicy, int __user *, policy,
> unsigned long __user *, nmask, unsigned long, maxnode,
> unsigned long, addr, unsigned long, flags)
> {
> int err;
> int uninitialized_var(pval);
> nodemask_t nodes;
>
> if (nmask != NULL && maxnode < MAX_NUMNODES)
> return -EINVAL;
> <== in the kernel code,
> MAX_NUMNODES comes to 512
Is it better that "MAX_NUMNODES" get from configure file?
For different platforms may have different MAX_NUMNODES.
Regards--
Liu Bo
> ----------------------------------------------------------------
> Analysis:
>
> When kernel config option 'configure maximum number of SMP
> processors and NUMA node' is set MAX_NUMNODES will be initialized to
> 512 and any call to get_mempolicy() with maxnode value less than that
> cause the test to fail.
> ----------------------------------------------------------------
> Fix:
> increase the default maxnode value in the test case to reflect
> this value. maxnode value comes from numaif.h and this patch increase
> the value to 512 from earlier 128.
>
> Note:
> I will submit it in the format, once the patch is accepted
>
> Thanks
> Yeehaw
>
> ------------------------------------------------------------------------
>
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