Re: [LTP] [PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()

Re: [LTP] [PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()

[kernel test robot]

Hello,

kernel test robot noticed "ltp.hugemmap06.fail" on:

commit: d793398401db9fb81084bd4fe2f782342201df18 ("[PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()")
url: https://github.com/intel-lab-lkp/linux/commits/Liam-R-Howlett/mm-mmap-Correctly-position-vma_iterator-in-__split_vma/20240711-075019
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/all/20240710192250.4114783-15-Liam.Howlett@oracle.com/
patch subject: [PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()

in testcase: ltp
version: ltp-x86_64-14c1f76-1_20240706
with following parameters:

	test: hugetlb/hugemmap06



compiler: gcc-13
test machine: 8 threads 1 sockets Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz (Ivy Bridge) with 16G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)



If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202407162022.5a730c37-oliver.sang@intel.com


Running tests.......
<<<test_start>>>
tag=hugemmap06 stime=1721029963
cmdline="hugemmap06"
contacts=""
analysis=exit
<<<test_output>>>
tst_hugepage.c:84: TINFO: 255 hugepage(s) reserved
tst_test.c:1803: TINFO: LTP version: 20240524-71-g361f6ad13
tst_test.c:1647: TINFO: Timeout per run is 0h 00m 30s
hugemmap06.c:114: TPASS: No regression found
hugemmap06.c:114: TPASS: No regression found
hugemmap06.c:114: TPASS: No regression found
hugemmap06.c:114: TPASS: No regression found
hugemmap06.c:100: TFAIL: mmap failed: ENOMEM (12)

HINT: You _MAY_ be missing kernel fixes:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f522c3ac00a4
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9119a41e9091
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7b24d8616be3
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1406ec9ba6c6

Summary:
passed   4
failed   1
broken   0
skipped  0
warnings 0
incrementing stop
<<<execution_status>>>
initiation_status="ok"
duration=10 termination_type=exited termination_id=1 corefile=no
cutime=2 cstime=629
<<<test_end>>>
INFO: ltp-pan reported some tests FAIL
LTP Version: 20240524-71-g361f6ad13

       ###############################################################

            Done executing testcases.
            LTP Version:  20240524-71-g361f6ad13
       ###############################################################



The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240716/202407162022.5a730c37-oliver.sang@intel.com



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https://github.com/intel/lkp-tests/wiki


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Re: [LTP] [PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()

[Liam R. Howlett via ltp]

* kernel test robot <oliver.sang@intel.com> [240716 08:47]:
> 
> 
> Hello,
> 
> kernel test robot noticed "ltp.hugemmap06.fail" on:

Hello Robot!

Thank you for finding this, it will certainly help me improve my next
revision of my series!

> 
> commit: d793398401db9fb81084bd4fe2f782342201df18 ("[PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()")
> url: https://github.com/intel-lab-lkp/linux/commits/Liam-R-Howlett/mm-mmap-Correctly-position-vma_iterator-in-__split_vma/20240711-075019
> base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
> patch link: https://lore.kernel.org/all/20240710192250.4114783-15-Liam.Howlett@oracle.com/
> patch subject: [PATCH v4 14/21] mm/mmap: Avoid zeroing vma tree in mmap_region()
> 
> in testcase: ltp
> version: ltp-x86_64-14c1f76-1_20240706
> with following parameters:
> 
> 	test: hugetlb/hugemmap06
> 
> 
> 

This is because I am trying to set up a MAP_FIXED huge page before
hugetlb_vm_op_close() is called, which removes the reserved huge pages.

I will address this in v5.

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