[PATCH v3 4/5] malloc: Add Huge Page support for mmap()

[Matheus Castanho]

Adhemerval Zanella <adhemerval.zanella@linaro.org> writes:

> On 26/08/2021 15:35, Matheus Castanho wrote:
>>
>> Hi Adhemerval,
>>
>> I gave this new version a try and I'm still hitting the
>> malloc/tst-free-errno* test failures on ppc64le as before [1][2]. I
>> tried to debug it but I failed to find the root cause so far.
>>
>> I could not reproduce it on x86_64 either, only ppc64le. Please let me
>> know if there's any test I can run to help.
>>
>> [1] https://sourceware.org/pipermail/libc-alpha/2021-August/130321.html
>> [2] https://sourceware.org/pipermail/libc-alpha/2021-August/130344.html
>
> I need to send an updated version of the 5/5. But is it the same failure
> as before?

For malloc/tst-free-errno*, yes. The others were fixed in the new
version. And these happen even without 5/5.

$ GLIBC_TUNABLES="glibc.malloc.hugetlb=2" make test t=malloc/tst-free-errno
[...]
double free or corruption (out)
make[2]: Leaving directory '/home/mscastanho/src/glibc/malloc'
FAIL: malloc/tst-free-errno
original exit status 1
Didn't expect signal from child: got `Aborted'

$ GLIBC_TUNABLES="glibc.malloc.hugetlb=2" make test t=malloc/tst-free-errno-mcheck
[...]
memory clobbered past end of allocated block
make[2]: Leaving directory '/home/mscastanho/src/glibc/malloc'
FAIL: malloc/tst-free-errno-mcheck
original exit status 1
Didn't expect signal from child: got `Aborted'

$ GLIBC_TUNABLES="glibc.malloc.hugetlb=2" make test t=malloc/tst-free-errno-malloc-check
[...]
make[2]: Leaving directory '/home/mscastanho/src/glibc/malloc'
FAIL: malloc/tst-free-errno-malloc-check
original exit status 1
error: xmmap.c:29: mmap of 16908288 bytes, prot=0x3, flags=0x32: Device or resource busy
error: 1 test failures

> Unfortunately the powerpc machines I have access don't have
> any large page configured, and I couldn't reproduced this issue on
> aarch64 as well.

--
Matheus Castanho