On Wed, Mar 11, 2026 at 9:07 PM Li Wang <[email protected]> wrote: > > test_zswap uses hardcoded values of 4095 and 4096 throughout as page > stride and page size, which are only correct on systems with a 4K page > size. On architectures with larger pages (e.g., 64K on arm64 or ppc64), > these constants cause memory to be touched at sub-page granularity, > leading to inefficient access patterns and incorrect page count > calculations, which can cause test failures. > > Replace all hardcoded 4095 and 4096 values with a global pagesize > variable initialized from sysconf(_SC_PAGESIZE) at startup, and remove > the redundant local sysconf() calls scattered across individual > functions. No functional change on 4K page size systems. > > Signed-off-by: Li Wang <[email protected]> > Cc: Johannes Weiner <[email protected]> > Cc: Michal Hocko <[email protected]> > Cc: Michal Koutný <[email protected]> > Cc: Muchun Song <[email protected]> > Cc: Nhat Pham <[email protected]> > Cc: Tejun Heo <[email protected]> > Cc: Roman Gushchin <[email protected]> > Cc: Shakeel Butt <[email protected]> > Cc: Yosry Ahmed <[email protected]>
It makes more sense to have this patch first, replacing all hardcoded values, then patch 5 doing the necessary changes on top.
