Hi, I'm seeing following tests failing on ppc64: HUGETLB_ELFMAP=W linkhuge_rw (16M: 32): Failed to map hugepage segment 0: 2f000000-31000000 (errno=16) HUGETLB_ELFMAP=RW linkhuge_rw (16M: 32): Failed to map hugepage segment 1: 2f000000-31000000 (errno=16) HUGETLB_ELFMAP=W HUGETLB_MINIMAL_COPY=no linkhuge_rw (16M: 32): Failed to map hugepage segment 0: 2f000000-31000000 (errno=16) HUGETLB_ELFMAP=RW HUGETLB_MINIMAL_COPY=no linkhuge_rw (16M: 32): Failed to map hugepage segment 1: 2f000000-31000000 (errno=16) HUGETLB_ELFMAP=RW HUGETLB_MINIMAL_COPY=no linkhuge_rw (16M: 32): Failed to map hugepage segment 1: 2f000000-31000000 (errno=16) HUGETLB_SHARE=0 HUGETLB_ELFMAP=W linkhuge_rw (16M: 32): Failed to map hugepage segment 0: 2f000000-31000000 (errno=16) HUGETLB_SHARE=1 HUGETLB_ELFMAP=W linkhuge_rw (16M: 32): Failed to map hugepage segment 0: 2f000000-31000000 (errno=16) HUGETLB_SHARE=1 HUGETLB_ELFMAP=RW linkhuge_rw (16M: 32): Failed to map hugepage segment 1: 2f000000-31000000 (errno=16)
# cat /proc/meminfo | grep Huge HugePages_Total: 50 HugePages_Free: 50 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 16384 kB # uname -r 3.5.0-0.23.el7.ppc64 # git describe 2.13-8-g03687a4 (origin/next) Here is partial output of first one running via strace: # env LD_LIBRARY_PATH=/root/libhugetlbfs/obj32/ HUGETLB_ELFMAP=W strace ./obj32/linkhuge_rw ... mmap(NULL, 0, PROT_NONE, MAP_FILE, 0, 0) = -1 EINVAL (Invalid argument) munmap(0x2fff0000, 262144) = 0 mmap(0x2f000000, 33554432, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0) = -1 EBUSY (Device or resource busy) I identified this part as remap_segments() in elflink.c. The way I understand it, this code munmaps ordinary page and places hugepage in its place. This is process memory map just before remap_segments(): 0fea0000-0feb0000 r-xp 00000000 fd:01 2759809 /root/libhugetlbfs/obj32/libhugetlbfs.so 0feb0000-0fec0000 r--p 00010000 fd:01 2759809 /root/libhugetlbfs/obj32/libhugetlbfs.so 0fec0000-0fed0000 rw-p 00020000 fd:01 2759809 /root/libhugetlbfs/obj32/libhugetlbfs.so 0fee0000-0fef0000 r-xp 00000000 fd:01 2759837 /root/libhugetlbfs/obj32/libhugetlbfs_privutils.so 0fef0000-0ff00000 r--p 00000000 fd:01 2759837 /root/libhugetlbfs/obj32/libhugetlbfs_privutils.so 0ff00000-0ff10000 rw-p 00010000 fd:01 2759837 /root/libhugetlbfs/obj32/libhugetlbfs_privutils.so 0ff20000-0ff30000 r-xp 00000000 fd:01 1855297 /usr/lib/libdl-2.15.so 0ff30000-0ff40000 r--p 00000000 fd:01 1855297 /usr/lib/libdl-2.15.so 0ff40000-0ff50000 rw-p 00010000 fd:01 1855297 /usr/lib/libdl-2.15.so 0ff60000-0ff80000 r-xp 00000000 fd:01 1855317 /usr/lib/libpthread-2.15.so 0ff80000-0ff90000 r--p 00010000 fd:01 1855317 /usr/lib/libpthread-2.15.so 0ff90000-0ffa0000 rw-p 00020000 fd:01 1855317 /usr/lib/libpthread-2.15.so 0ffb0000-0ffe0000 r-xp 00000000 fd:01 1837414 /usr/lib/ld-2.15.so 0ffe0000-0fff0000 r--p 00020000 fd:01 1837414 /usr/lib/ld-2.15.so 0fff0000-10000000 rw-p 00030000 fd:01 1837414 /usr/lib/ld-2.15.so 10000000-10020000 r-xp 00000000 fd:01 2760027 /root/libhugetlbfs/tests/obj32/linkhuge_rw 2fff0000-30000000 r--p 0fff0000 fd:01 2760027 /root/libhugetlbfs/tests/obj32/linkhuge_rw 30000000-30020000 rw-p 10000000 fd:01 2760027 /root/libhugetlbfs/tests/obj32/linkhuge_rw 30020000-30030000 rwxp 00000000 00:00 0 30180000-301b0000 rwxp 00000000 00:00 0 [heap] f7ae0000-f7c80000 r-xp 00000000 fd:01 1855284 /usr/lib/libc-2.15.so f7c80000-f7c90000 r--p 001a0000 fd:01 1855284 /usr/lib/libc-2.15.so f7c90000-f7ca0000 rw-p 001b0000 fd:01 1855284 /usr/lib/libc-2.15.so ff820000-ff850000 rw-p 00000000 00:00 0 [stack] The area munmap() removes is 0x2fff0000-0x30030000, so 2 huge pages of size 16M are needed as replacement. But they can't fit in, because mmap(0x2f000000, 33554432, ...) is mapping area "0x2f000000-0x31000000", which collides with [heap]. Is this a known limitation/bug? Regards, Jan ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Libhugetlbfs-devel mailing list Libhugetlbfs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libhugetlbfs-devel
