Re: [PATCH v2 0/4] Speed up boot with faster linear map creation

[Itaru Kitayama <itaru.kitayama@linux.dev>]

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> On Apr 10, 2024, at 8:30, Itaru Kitayama <itaru.kitayama@linux.dev> wrote:
> 
> Hi David,
> 
>> On Apr 9, 2024, at 23:45, David Hildenbrand <david@redhat.com> wrote:
>> 
>> On 09.04.24 16:39, Ryan Roberts wrote:
>>> On 09/04/2024 15:29, David Hildenbrand wrote:
>>>> On 09.04.24 16:13, Ryan Roberts wrote:
>>>>> On 09/04/2024 12:51, David Hildenbrand wrote:
>>>>>> On 09.04.24 13:29, David Hildenbrand wrote:
>>>>>>> On 09.04.24 13:22, David Hildenbrand wrote:
>>>>>>>> On 09.04.24 12:13, Itaru Kitayama wrote:
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>>> On Apr 9, 2024, at 19:04, Ryan Roberts <ryan.roberts@arm.com> wrote:
>>>>>>>>>> 
>>>>>>>>>> On 09/04/2024 01:10, Itaru Kitayama wrote:
>>>>>>>>>>> Hi Ryan,
>>>>>>>>>>> 
>>>>>>>>>>>> On Apr 8, 2024, at 16:30, Ryan Roberts <ryan.roberts@arm.com> wrote:
>>>>>>>>>>>> 
>>>>>>>>>>>> On 06/04/2024 11:31, Itaru Kitayama wrote:
>>>>>>>>>>>>> Hi Ryan,
>>>>>>>>>>>>> 
>>>>>>>>>>>>> On Sat, Apr 06, 2024 at 09:32:34AM +0100, Ryan Roberts wrote:
>>>>>>>>>>>>>> Hi Itaru,
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> On 05/04/2024 08:39, Itaru Kitayama wrote:
>>>>>>>>>>>>>>> On Thu, Apr 04, 2024 at 03:33:04PM +0100, Ryan Roberts wrote:
>>>>>>>>>>>>>>>> Hi All,
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> It turns out that creating the linear map can take a significant
>>>>>>>>>>>>>>>> proportion of
>>>>>>>>>>>>>>>> the total boot time, especially when rodata=full. And most of the
>>>>>>>>>>>>>>>> time is spent
>>>>>>>>>>>>>>>> waiting on superfluous tlb invalidation and memory barriers. This
>>>>>>>>>>>>>>>> series reworks
>>>>>>>>>>>>>>>> the kernel pgtable generation code to significantly reduce the number
>>>>>>>>>>>>>>>> of those
>>>>>>>>>>>>>>>> TLBIs, ISBs and DSBs. See each patch for details.
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> The below shows the execution time of map_mem() across a couple of
>>>>>>>>>>>>>>>> different
>>>>>>>>>>>>>>>> systems with different RAM configurations. We measure after applying
>>>>>>>>>>>>>>>> each patch
>>>>>>>>>>>>>>>> and show the improvement relative to base (v6.9-rc2):
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>>                   | Apple M2 VM | Ampere Altra| Ampere Altra| Ampere
>>>>>>>>>>>>>>>> Altra
>>>>>>>>>>>>>>>>                   | VM, 16G     | VM, 64G     | VM, 256G    | Metal,
>>>>>>>>>>>>>>>> 512G
>>>>>>>>>>>>>>>> ---------------|-------------|-------------|-------------|-------------
>>>>>>>>>>>>>>>>                   |   ms    (%) |   ms    (%) |   ms    (%) |
>>>>>>>>>>>>>>>> ms    (%)
>>>>>>>>>>>>>>>> ---------------|-------------|-------------|-------------|-------------
>>>>>>>>>>>>>>>> base           |  153   (0%) | 2227   (0%) | 8798   (0%) | 17442
>>>>>>>>>>>>>>>> (0%)
>>>>>>>>>>>>>>>> no-cont-remap  |   77 (-49%) |  431 (-81%) | 1727 (-80%) |  3796
>>>>>>>>>>>>>>>> (-78%)
>>>>>>>>>>>>>>>> batch-barriers |   13 (-92%) |  162 (-93%) |  655 (-93%) |  1656
>>>>>>>>>>>>>>>> (-91%)
>>>>>>>>>>>>>>>> no-alloc-remap |   11 (-93%) |  109 (-95%) |  449 (-95%) |  1257
>>>>>>>>>>>>>>>> (-93%)
>>>>>>>>>>>>>>>> lazy-unmap     |    6 (-96%) |   61 (-97%) |  257 (-97%) |   838
>>>>>>>>>>>>>>>> (-95%)
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> This series applies on top of v6.9-rc2. All mm selftests pass. I've
>>>>>>>>>>>>>>>> compile and
>>>>>>>>>>>>>>>> boot tested various PAGE_SIZE and VA size configs.
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> ---
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> Changes since v1 [1]
>>>>>>>>>>>>>>>> ====================
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>>      - Added Tested-by tags (thanks to Eric and Itaru)
>>>>>>>>>>>>>>>>      - Renamed ___set_pte() -> __set_pte_nosync() (per Ard)
>>>>>>>>>>>>>>>>      - Reordered patches (biggest impact & least controversial first)
>>>>>>>>>>>>>>>>      - Reordered alloc/map/unmap functions in mmu.c to aid reader
>>>>>>>>>>>>>>>>      - pte_clear() -> __pte_clear() in clear_fixmap_nosync()
>>>>>>>>>>>>>>>>      - Reverted generic p4d_index() which caused x86 build error.
>>>>>>>>>>>>>>>> Replaced with
>>>>>>>>>>>>>>>>        unconditional p4d_index() define under arm64.
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> [1]
>>>>>>>>>>>>>>>> https://lore.kernel.org/linux-arm-kernel/20240326101448.3453626-1-ryan.roberts@arm.com/<https://lore.kernel.org/linux-arm-kernel/20240326101448.3453626-1-ryan.roberts@arm.com/>
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>>>>> Ryan
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> Ryan Roberts (4):
>>>>>>>>>>>>>>>>      arm64: mm: Don't remap pgtables per-cont(pte|pmd) block
>>>>>>>>>>>>>>>>      arm64: mm: Batch dsb and isb when populating pgtables
>>>>>>>>>>>>>>>>      arm64: mm: Don't remap pgtables for allocate vs populate
>>>>>>>>>>>>>>>>      arm64: mm: Lazily clear pte table mappings from fixmap
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> arch/arm64/include/asm/fixmap.h  |   5 +-
>>>>>>>>>>>>>>>> arch/arm64/include/asm/mmu.h     |   8 +
>>>>>>>>>>>>>>>> arch/arm64/include/asm/pgtable.h |  13 +-
>>>>>>>>>>>>>>>> arch/arm64/kernel/cpufeature.c   |  10 +-
>>>>>>>>>>>>>>>> arch/arm64/mm/fixmap.c           |  11 +
>>>>>>>>>>>>>>>> arch/arm64/mm/mmu.c              | 377 +++++++++++++++++++++++--------
>>>>>>>>>>>>>>>> 6 files changed, 319 insertions(+), 105 deletions(-)
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>>> -- 
>>>>>>>>>>>>>>>> 2.25.1
>>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>> 
>>>>>>>>>>>>>>> I've build and boot tested the v2 on FVP, base is taken from your
>>>>>>>>>>>>>>> linux-rr repo. Running run_vmtests.sh on v2 left some gup longterm not
>>>>>>>>>>>>>>> oks, would you take a look at it? The mm ksefltests used is from your
>>>>>>>>>>>>>>> linux-rr repo too.
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Thanks for taking a look at this.
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> I can't reproduce your issue unfortunately; steps as follows on Apple
>>>>>>>>>>>>>> M2 VM:
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Config: arm64 defconfig + the following:
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> # Squashfs for snaps, xfs for large file folios.
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_SQUASHFS_LZ4
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_SQUASHFS_LZO
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_SQUASHFS_XZ
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_SQUASHFS_ZSTD
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_XFS_FS
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> # For general mm debug.
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_DEBUG_VM
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_DEBUG_VM_MAPLE_TREE
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_DEBUG_VM_RB
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_DEBUG_VM_PGFLAGS
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_DEBUG_VM_PGTABLE
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_PAGE_TABLE_CHECK
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> # For mm selftests.
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_USERFAULTFD
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_TEST_VMALLOC
>>>>>>>>>>>>>> ./scripts/config --enable CONFIG_GUP_TEST
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Running on VM with 12G memory, split across 2 (emulated) NUMA nodes
>>>>>>>>>>>>>> (needed by
>>>>>>>>>>>>>> some mm selftests), with kernel command line to reserve hugetlbs and
>>>>>>>>>>>>>> other
>>>>>>>>>>>>>> features required by some mm selftests:
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> "
>>>>>>>>>>>>>> transparent_hugepage=madvise earlycon root=/dev/vda2 secretmem.enable
>>>>>>>>>>>>>> hugepagesz=1G hugepages=0:2,1:2 hugepagesz=32M hugepages=0:2,1:2
>>>>>>>>>>>>>> default_hugepagesz=2M hugepages=0:64,1:64 hugepagesz=64K
>>>>>>>>>>>>>> hugepages=0:2,1:2
>>>>>>>>>>>>>> "
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Ubuntu userspace running off XFS rootfs. Build and run mm selftests
>>>>>>>>>>>>>> from same
>>>>>>>>>>>>>> git tree.
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Although I don't think any of this config should make a difference to
>>>>>>>>>>>>>> gup_longterm.
>>>>>>>>>>>>>> 
>>>>>>>>>>>>>> Looks like your errors are all "ftruncate() failed". I've seen this
>>>>>>>>>>>>>> problem on
>>>>>>>>>>>>>> our CI system. There it is due to running the tests from NFS file
>>>>>>>>>>>>>> system. What
>>>>>>>>>>>>>> filesystem are you using? Perhaps you are sharing into the FVP using
>>>>>>>>>>>>>> 9p? That
>>>>>>>>>>>>>> might also be problematic.
>>>>>>>>>>>>> 
>>>>>>>>>>>>> That was it. This time I booted up the kernel including your series on
>>>>>>>>>>>>> QEMU on my M1 and executed the gup_longterm program without the ftruncate
>>>>>>>>>>>>> failures. When testing your kernel on FVP, I was executing the script
>>>>>>>>>>>>> from the FVP's host filesystem using 9p.
>>>>>>>>>>>> 
>>>>>>>>>>>> I'm not sure exactly what the root cause is. Perhaps there isn't enough
>>>>>>>>>>>> space on
>>>>>>>>>>>> the disk? It might be worth enhancing the error log to provide the
>>>>>>>>>>>> errno in
>>>>>>>>>>>> tools/testing/selftests/mm/gup_longterm.c.
>>>>>>>>>>>> 
>>>>>>>>>>> 
>>>>>>>>>>> Attached is the strace’d gup_longterm executiong log on your
>>>>>>>>>>> pgtable-boot-speedup-v2 kernel.
>>>>>>>>>> 
>>>>>>>>>> Sorry are you saying that it only fails with the pgtable-boot-speedup-v2
>>>>>>>>>> patch
>>>>>>>>>> set applied? I thought we previously concluded that it was independent of
>>>>>>>>>> that?
>>>>>>>>>> I was under the impression that it was filesystem related and not something
>>>>>>>>>> that
>>>>>>>>>> I was planning to investigate.
>>>>>>>>> 
>>>>>>>>> No, irrespective of the kernel, if using 9p on FVP the test program fails.
>>>>>>>>> It is indeed 9p filesystem related, as I switched to using NFS all the
>>>>>>>>> issues are gone.
>>>>>>>> 
>>>>>>>> Did it never work on 9p? If so, we might have to SKIP that test.
>>>>>>>> 
>>>>>>>> openat(AT_FDCWD, "gup_longterm.c_tmpfile_BLboOt", O_RDWR|O_CREAT|O_EXCL,
>>>>>>>> 0600) = 3
>>>>>>>> unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_BLboOt", 0) = 0
>>>>>>>> fstatfs(3, 0xffffe505a840)              = -1 EOPNOTSUPP (Operation not
>>>>>>>> supported)
>>>>>>>> ftruncate(3, 4096)                      = -1 ENOENT (No such file or
>>>>>>>> directory)
>>>>>>> 
>>>>>>> Note: I'm wondering if the unlinkat here is the problem that makes
>>>>>>> ftruncate() with 9p result in weird errors (e.g., the hypervisor
>>>>>>> unlinked the file and cannot reopen it for the fstatfs/ftruncate. ...
>>>>>>> which gives us weird errors here).
>>>>>>> 
>>>>>>> Then, we should lookup the fs type in run_with_local_tmpfile() before
>>>>>>> the unlink() and simply skip the test if it is 9p.
>>>>>> 
>>>>>> The unlink with 9p most certainly was a known issue in the past:
>>>>>> 
>>>>>> https://gitlab.com/qemu-project/qemu/-/issues/103
>>>>>> 
>>>>>> Maybe it's still an issue with older hypervisors (QEMU?)? Or it was never
>>>>>> completely resolved?
>>>>> 
>>>>> I believe Itaru is running on FVP (Fixed Virtual Platform - "fast model" -
>>>>> Arm's architecture emulator). So QEMU won't be involved here. The FVP emulates
>>>>> a 9p device, so perhaps the bug is in there.
>>>> 
>>>> Very likely.
>>>> 
>>>>> 
>>>>> Note that I see lots of "fallocate() failed" failures in gup_longterm when
>>>>> running on our CI system. This is a completely different setup; Real HW with
>>>>> Linux running bare metal using an NFS rootfs. I'm not sure if this is related.
>>>>> Logs show it failing consistently for the "tmpfile" and "local tmpfile" test
>>>>> configs. I also see a couple of these fails in the cow tests.
>>>> 
>>>> What is the fallocate() errno you are getting? strace log would help (to see if
>>>> statfs also fails already)! Likely a similar NFS issue.
>>> Unfortunately this is a system I don't have access to. I've requested some of
>>> this triage to be done, but its fairly low priority unfortunately.
>> 
>> To work around these BUGs (?) elsewhere, we could simply skip the test if get_fs_type() is not able to detect the FS type. Likely that's an early indicator that the unlink() messed something up.
>> 
>> ... doesn't feel right, though.
> 
> I think it’s a good idea so that the mm kselftests results look reasonable. Since you’re an expert on GUP-fast (or fast-GUP?), when you update the code, could you print out errno as well like the split_huge_page_test.c does?
> 
> Thanks,
> Itaru.

David, attached is the straced execution log of the gup_longterm kselftest over the NFS case.
I’m running the program on FVP, let me know if you need other logs or test results.  

Thanks,
Itaru.


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execve("./gup_longterm", ["./gup_longterm"], 0xfffff6515bf0 /* 12 vars */) = 0
brk(NULL)                               = 0xaaaad667d000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xffffbb911000
faccessat(AT_FDCWD, "/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\260\265\2\0\0\0\0\0"..., 832) = 832
newfstatat(3, "", {st_mode=S_IFREG|0755, st_size=1605640, ...}, AT_EMPTY_PATH) = 0
mmap(NULL, 1650608, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xffffbb77e000
mmap(0xffffbb900000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x182000) = 0xffffbb900000
mmap(0xffffbb905000, 49072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffffbb905000
close(3)                                = 0
set_tid_address(0xffffbb911ef0)         = 24635
set_robust_list(0xffffbb911f00, 24)     = 0
rseq(0xffffbb912540, 0x20, 0, 0xd428bc00) = 0
mprotect(0xffffbb900000, 12288, PROT_READ) = 0
mprotect(0xaaaacb0ef000, 4096, PROT_READ) = 0
mprotect(0xffffbb93c000, 8192, PROT_READ) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
openat(AT_FDCWD, "/sys/kernel/mm/hugepages/", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0
getrandom("\x07\x03\x22\xbd\xf2\x68\x38\x0d", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0xaaaad667d000
brk(0xaaaad669e000)                     = 0xaaaad669e000
getdents64(3, 0xaaaad667d2d0 /* 6 entries */, 32768) = 208
newfstatat(1, "", {st_mode=S_IFIFO|0600, st_size=0, ...}, AT_EMPTY_PATH) = 0
getdents64(3, 0xaaaad667d2d0 /* 0 entries */, 32768) = 0
close(3)                                = 0
openat(AT_FDCWD, "/sys/kernel/debug/gup_test", O_RDWR) = -1 ENOENT (No such file or directory)
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_WMLTNf", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_WMLTNf", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb400000
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_inQHdT", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_inQHdT", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb400000
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_IJd9EX", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_IJd9EX", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb400000
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_qh3L7P", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_qh3L7P", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xffffbb400000
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
close(3)                                = 0
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
openat(AT_FDCWD, "gup_longterm.c_tmpfile_2Alu3T", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_2Alu3T", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb400000
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
write(1, "# [INFO] detected hugetlb page s"..., 4096# [INFO] detected hugetlb page size: 2048 KiB
# [INFO] detected hugetlb page size: 32768 KiB
# [INFO] detected hugetlb page size: 64 KiB
# [INFO] detected hugetlb page size: 1048576 KiB
TAP version 13
1..56
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd
ok 1 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with tmpfile
ok 2 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with local tmpfile
ok 3 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 4 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 5 # SKIP need more free huge pages
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 6 # SKIP need more free huge pages
# [RUN] R/W longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 7 # SKIP need more free huge pages
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd
ok 8 # SKIP gup_test not available
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with tmpfile
ok 9 # SKIP gup_test not available
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with local tmpfile
ok 10 # SKIP gup_test not available
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 11 # SKIP gup_test not available
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 12 # SKIP need more free huge pages
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 13 # SKIP need more free huge pages
# [RUN] R/W longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 14 # SKIP need more free huge pages
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd
ok 15 # SKIP gup_test not available
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with tmpfile
ok 16 # SKIP gup_test not available
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with local tmpfile
ok 17 # SKIP gup_test not available
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 18 # SKIP gup_test not available
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 19 # SKIP need more free huge pages
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 20 # SKIP need more free huge pages
# [RUN] R/O longterm GUP pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 21 # SKIP need more free huge pages
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd
ok 22 # SKIP gup_test not available
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with tmpfile
ok 23 # SKIP gup_test not available
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with local tmpfile
ok 24 # SKIP gup_test not available
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (2048 kB)
ok 25 # SKIP gup_test not available
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (32768 kB)
ok 26 # SKIP need more free huge pages
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (64 kB)
ok 27 # SKIP need more free huge pages
# [RUN] R/O longterm GUP-fast pin in MAP_SHARED file mapping ... with memfd hugetlb (1048576 kB)
ok 28 # SKIP need more free huge pages
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd
ok 29 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with tmpfile
ok 30 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with local tmpfile
ok 31 # SKIP gup_test not available
# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
ok 32 # SKIP gup_test not available
) = 4096
write(1, "# [RUN] R/W longterm GUP pin in "..., 91# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 91
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 33 # SKIP need more free huge"..., 39ok 33 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP pin in "..., 88# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 88
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 34 # SKIP need more free huge"..., 39ok 34 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP pin in "..., 93# [RUN] R/W longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 93
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 35 # SKIP need more free huge"..., 39ok 35 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 77# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd
) = 77
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 36 # SKIP gup_test not availa"..., 36ok 36 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 79# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with tmpfile
) = 79
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 37 # SKIP gup_test not availa"..., 36ok 37 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 85# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with local tmpfile
) = 85
openat(AT_FDCWD, "gup_longterm.c_tmpfile_SKHXe1", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_SKHXe1", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 38 # SKIP gup_test not availa"..., 36ok 38 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 95# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
) = 95
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb400000
write(1, "ok 39 # SKIP gup_test not availa"..., 36ok 39 # SKIP gup_test not available
) = 36
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 96# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 96
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 40 # SKIP need more free huge"..., 39ok 40 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 93# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 93
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 41 # SKIP need more free huge"..., 39ok 41 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/W longterm GUP-fast pi"..., 98# [RUN] R/W longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 98
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 42 # SKIP need more free huge"..., 39ok 42 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 72# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd
) = 72
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 43 # SKIP gup_test not availa"..., 36ok 43 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 74# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with tmpfile
) = 74
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 44 # SKIP gup_test not availa"..., 36ok 44 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 80# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with local tmpfile
) = 80
openat(AT_FDCWD, "gup_longterm.c_tmpfile_YUsLWy", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_YUsLWy", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 45 # SKIP gup_test not availa"..., 36ok 45 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 90# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
) = 90
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb400000
write(1, "ok 46 # SKIP gup_test not availa"..., 36ok 46 # SKIP gup_test not available
) = 36
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 91# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 91
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 47 # SKIP need more free huge"..., 39ok 47 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 88# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 88
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 48 # SKIP need more free huge"..., 39ok 48 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP pin in "..., 93# [RUN] R/O longterm GUP pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 93
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 49 # SKIP need more free huge"..., 39ok 49 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 77# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd
) = 77
memfd_create("test", 0)                 = 3
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x4c9de942, 0x9353d673]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 50 # SKIP gup_test not availa"..., 36ok 50 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 79# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with tmpfile
) = 79
openat(AT_FDCWD, "/tmp", O_RDWR|O_EXCL|O_TMPFILE, 0600) = 3
fcntl(3, F_GETFL)                       = 0x424002 (flags O_RDWR|O_LARGEFILE|O_TMPFILE)
fstatfs(3, {f_type=TMPFS_MAGIC, f_bsize=4096, f_blocks=416015, f_bfree=415997, f_bavail=415997, f_files=416015, f_ffree=416009, f_fsid={val=[0x8e6b7ce6, 0xe1737440]}, f_namelen=255, f_frsize=4096, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 51 # SKIP gup_test not availa"..., 36ok 51 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 85# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with local tmpfile
) = 85
openat(AT_FDCWD, "gup_longterm.c_tmpfile_sYGgQd", O_RDWR|O_CREAT|O_EXCL, 0600) = 3
unlinkat(AT_FDCWD, "gup_longterm.c_tmpfile_sYGgQd", 0) = 0
fstatfs(3, {f_type=NFS_SUPER_MAGIC, f_bsize=1048576, f_blocks=112200, f_bfree=27954, f_bavail=23296, f_files=7307264, f_ffree=4724815, f_fsid={val=[0, 0]}, f_namelen=255, f_frsize=1048576, f_flags=ST_VALID|ST_RELATIME}) = 0
ftruncate(3, 4096)                      = 0
fallocate(3, 0, 0, 4096)                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb77d000
write(1, "ok 52 # SKIP gup_test not availa"..., 36ok 52 # SKIP gup_test not available
) = 36
munmap(0xffffbb77d000, 4096)            = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 95# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (2048 kB)
) = 95
memfd_create("test", MFD_HUGETLB|21<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=2097152, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x10, 0]}, f_namelen=255, f_frsize=2097152, f_flags=ST_VALID}) = 0
ftruncate(3, 2097152)                   = 0
fallocate(3, 0, 0, 2097152)             = 0
mmap(NULL, 2097152, PROT_READ|PROT_WRITE, MAP_PRIVATE, 3, 0) = 0xffffbb400000
write(1, "ok 53 # SKIP gup_test not availa"..., 36ok 53 # SKIP gup_test not available
) = 36
munmap(0xffffbb400000, 2097152)         = 0
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 96# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (32768 kB)
) = 96
memfd_create("test", MFD_HUGETLB|25<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=33554432, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x12, 0]}, f_namelen=255, f_frsize=33554432, f_flags=ST_VALID}) = 0
ftruncate(3, 33554432)                  = 0
fallocate(3, 0, 0, 33554432)            = -1 ENOSPC (No space left on device)
write(1, "ok 54 # SKIP need more free huge"..., 39ok 54 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 93# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (64 kB)
) = 93
memfd_create("test", MFD_HUGETLB|16<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=65536, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x13, 0]}, f_namelen=255, f_frsize=65536, f_flags=ST_VALID}) = 0
ftruncate(3, 65536)                     = 0
fallocate(3, 0, 0, 65536)               = -1 ENOSPC (No space left on device)
write(1, "ok 55 # SKIP need more free huge"..., 39ok 55 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# [RUN] R/O longterm GUP-fast pi"..., 98# [RUN] R/O longterm GUP-fast pin in MAP_PRIVATE file mapping ... with memfd hugetlb (1048576 kB)
) = 98
memfd_create("test", MFD_HUGETLB|30<<MFD_HUGE_SHIFT) = 3
fstatfs(3, {f_type=HUGETLBFS_MAGIC, f_bsize=1073741824, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={val=[0x11, 0]}, f_namelen=255, f_frsize=1073741824, f_flags=ST_VALID}) = 0
ftruncate(3, 1073741824)                = 0
fallocate(3, 0, 0, 1073741824)          = -1 ENOSPC (No space left on device)
write(1, "ok 56 # SKIP need more free huge"..., 39ok 56 # SKIP need more free huge pages
) = 39
close(3)                                = 0
write(1, "# Totals: pass:0 fail:0 xfail:0 "..., 56# Totals: pass:0 fail:0 xfail:0 xpass:0 skip:56 error:0
) = 56
exit_group(0)                           = ?
+++ exited with 0 +++

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> 
>> 
>> -- 
>> Cheers,
>> 
>> David / dhildenb