On Wed, Oct 02, 2024 at 05:06:22AM +0800, Kairui Song wrote: > From: Kairui Song <kasong@xxxxxxxxxxx> > > This series fixes the page cache corruption issue reported by Christian > Theune [1]. The issue was reported affects kernels back to 5.19. > Current maintained effected branches includes 6.1 and 6.6 and the fix > was included in 6.10 already. > > This series can be applied for both 6.1 and 6.6. > > Patch 3/3 is the fixing patch. It was initially submitted and merge as > an optimization but found to have fixed the corruption by handling race > correctly. > > Patch 1/3 and 2/3 is required for 3/3. > > Patch 3/3 included some unit test code, making the LOC of the backport a > bit higher, but should be OK to be kept, since they are just test code. > > Note there seems still some unresolved problem in Link [1] but that > should be a different issue, and the commits being backported have been > well tested, they fix the corruption issue just fine. > > Link: https://lore.kernel.org/linux-mm/A5A976CB-DB57-4513-A700-656580488AB6@xxxxxxxxxxxxxxx/ [1] > > Kairui Song (3): > mm/filemap: return early if failed to allocate memory for split > lib/xarray: introduce a new helper xas_get_order > mm/filemap: optimize filemap folio adding > > include/linux/xarray.h | 6 +++ > lib/test_xarray.c | 93 ++++++++++++++++++++++++++++++++++++++++++ > lib/xarray.c | 49 ++++++++++++++-------- > mm/filemap.c | 50 ++++++++++++++++++----- > 4 files changed, 169 insertions(+), 29 deletions(-) > > -- > 2.46.1 > > All now queued up, thanks. greg k-h
