Glibc tests status

posix/bug-ga2

With Google DNS (8.8.8.8 in /etc/resolv.conf) I see:

# .../build/posix/bug-ga2
Temporary failure in name resolution
# echo $?
0

With Synopsys DNS (via my laptop 10.42.0.1) test immediately succeeds:

# .../build/posix/bug-ga2
# echo $?
0

stdio-common/bug22

Needs 2 Gb of memory for 1 user-space process which we cannot provide on HSDK w/o HIGHMEM/PAE40.

See https://sourceware.org/git/?p=glibc.git;a=blob;f=stdio-common/bug22.c The last printf after preprocessor looks like that:

fprintf (fp, "%1073741825d %1073741825d", 1, 1);

So we're going to print 2 numbers (that's not really important) of size (INT_MAX / 2) + 2 (=1073741825). And that's what we get during execution:

mmap2(NULL, 1073750016, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory)
mmap2(NULL, 1073881088, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM (Cannot allocate memory)

Obviosly we cannot allocate even 1Gb buffer if we only have 750Mb free:

# free
             total       used       free     shared    buffers     cached
Mem:        772960      24760     748200      13312          0      13664
-/+ buffers/cache:      11096     761864
Swap:            0          0          0

So to make this test executed normally we need to get more memory with either PAE40 or SWAP but...

1. PAE40 will need IOC to be disabled and given we extensively use Networking for glibc I will be surprised if we don't see more weird issues here and there, so probably not the best option.
2. SWAP we may try but that will slow-down execution quite a lot and for that test there's a timeout value of 60 seconds, see https://sourceware.org/git/?p=glibc.git;a=blob;f=stdio-common/bug22.c#l54

So I'd suggest to keep stdio-common/bug22 as a known FAIL for our current limited platform.