[LTP] about hugetlbfs

[LTP] about hugetlbfs

[lina.zhao]

Hi all,

I have some problem about hugetlbfs test.

In hugeshmat01.c
the attach address for shmat is 0x90000eee .
But for mips32_Linux system ,the user pthread space is 
0x00000000~0x7fffffff,
so 0x90000eee exceed the space ,the test will always failed on mips_32.

In hugemmap02.c
#define LOW_ADDR2      (void *)(0x90000000)
#define LOW_ADDR       (void *)(0x80000000)
addr = mmap(LOW_ADDR, PAGE_SIZE, PROT_READ,
                            MAP_SHARED | MAP_FIXED, nfildes, 0);
addr2 = mmap(LOW_ADDR2, MAP_SIZE, PROT_READ | PROT_WRITE,
                            MAP_SHARED, fildes, 0);

 /* 32-bit process */
                if (addr2 > 0){
                        tst_resm(TCONF, "huge mmap() failed to test the 
scenario");
                        continue;
                } else if (addr == 0) {
                        tst_resm(TPASS, "huge mmap() succeeded for 32-bit");
                } else {
                        tst_resm(TFAIL, "huge mmap() unexpectedly failed 
%s for 32-bit, errno=%d : %s",
                                TEMPFILE, errno, strerror(errno));
                }

the 0x90000000  and 0x80000000 also exceed mips32 user pthread space , 
so I changed them .
but add2 always return 717225984, no matter what I allocate to LOW_ADDR2.
at last ,I changed LOW_ADDR2 to NULL, it also returned 717225984.

in the function ,why addr2> 0 then error happens?
why addr should be 0? it is what exactly the LOW_ADDR assigns.

Thanks and Best Regards,
Lina

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