Messages in this thread | | | Date | Mon, 15 Nov 1999 18:32:59 +0100 | From | Manfred Spraul <> | Subject | start_stack question |
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sys_shmat() contains the following lines: /* * If shm segment goes below stack, make sure there is some * space left for the stack to grow (presently 4 pages). */ if (addr < current->mm->start_stack && addr > current->mm->start_stack - PAGE_SIZE*(shp->shm_npages + 4)) goto out_unlock_up;
IMHO the test looks weird, is that really required? * what if the stack is longer than 4 pages? * what if the current process is multi-threaded? * [the line is nearly identical to the test in linux-1.0.9]
Please help, I have not yet read the details of the mmap code.
Thanks, Manfred
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