On Friday 27 February 2004 15:24, Benoît Lefebvre wrote:
> Hi,
>
> Consider the following lines of code from mlock.c
>
> asmlinkage long sys_mlockall(int flags)
> {
> unsigned long lock_limit;
> ...
>
> lock_limit = current->rlim[RLIMIT_MEMLOCK].rlim_cur;
> lock_limit >>= PAGE_SHIFT;
> ...
> if (current->mm->total_vm > lock_limit)
> goto out;
> ...
>
> My question is about "lock_limit >>= PAGE_SHIFT;". I dont understand
> why this line is needed. Why we cannot just compare rlim_cur with
> current->mm->total_vm?
If you did, would you not be comparing bytes to pages?
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