On 9/28/26 05:26, Martin Cracauer wrote: > Add a test that asserts that functionality needed for generational > garbage collection works. Namely to implement a write barrier using > userfaultfd instead of using segmentation faults. The planned target > is the GC in SBCL. > > The real GC will initially fill heap pages by using on-demand loading > of pages from an image file, either via mmap(2) or using userfaultfd > to decompress a page read from an image file made from individually > compressed blocks. This test doesn't do that so that it needs no disk > I/O and no decompression library. Instead, a fault will be filled by > copying page content from prepared pages in the heap. > > Assisted-by: Anthropic:Opus-5.5 > Signed-off-by: Martin Cracauer <[email protected]> > --- > tools/testing/selftests/mm/Makefile | 1 + > tools/testing/selftests/mm/uffd-missing-wp.c | 413 +++++++++++++++++++ > 2 files changed, 414 insertions(+) > create mode 100644 tools/testing/selftests/mm/uffd-missing-wp.c
Isn't something like that a better fit for LTP? -- Cheers, David
