lkml.org 
[lkml]   [2022]   [Sep]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v1 0/7] selftests/vm: test COW handling of anonymous memory
Date
On top of mm-stable.

This is my current set of tests for testing COW handling of anonymous
memory, especially when interacting with GUP. I developed these tests
while working on PageAnonExclusive and managed to clean them up just now.

On current upstream Linux, all tests pass except the hugetlb tests that
rely on vmsplice -- these tests should pass as soon as vmsplice properly
uses FOLL_PIN instead of FOLL_GET.

I'm working on additional tests for COW handling in private mappings,
focusing on long-term R/O pinning e.g., of the shared zeropage, pagecache
pages and KSM pages. These tests, however, will go into a different file.
So this is everything I have regarding tests for anonymous memory.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Nadav Amit <namit@vmware.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Christoph von Recklinghausen <crecklin@redhat.com>
Cc: Don Dutile <ddutile@redhat.com>

David Hildenbrand (7):
selftests/vm: anon_cow: test COW handling of anonymous memory
selftests/vm: factor out pagemap_is_populated() into vm_util
selftests/vm: anon_cow: THP tests
selftests/vm: anon_cow: hugetlb tests
selftests/vm: anon_cow: add liburing test cases
mm/gup_test: start/stop/read functionality for PIN LONGTERM test
selftests/vm: anon_cow: add R/O longterm tests via gup_test

mm/gup_test.c | 140 +++
mm/gup_test.h | 12 +
tools/testing/selftests/vm/.gitignore | 1 +
tools/testing/selftests/vm/Makefile | 25 +-
tools/testing/selftests/vm/anon_cow.c | 1126 ++++++++++++++++++++
tools/testing/selftests/vm/check_config.sh | 31 +
tools/testing/selftests/vm/madv_populate.c | 8 -
tools/testing/selftests/vm/run_vmtests.sh | 3 +
tools/testing/selftests/vm/vm_util.c | 15 +
tools/testing/selftests/vm/vm_util.h | 2 +
10 files changed, 1353 insertions(+), 10 deletions(-)
create mode 100644 tools/testing/selftests/vm/anon_cow.c
create mode 100644 tools/testing/selftests/vm/check_config.sh

--
2.37.3

\
 
 \ /
  Last update: 2022-09-27 13:04    [W:0.076 / U:1.276 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site