On Wed, 9 Nov 2016 11:55:31 +0100 Vitaly Wool <vitalyw...@gmail.com> wrote:
> Subject: [PATCH v3] z3fold: use per-page read/write lock I've rewritten the title to "mm/z3fold.c: use per-page spinlock" (I prefer to have "mm" in the title to easily identify it as an MM patch, and using "mm: z3fold: ..." seems odd when the actual pathname conveys the same info.) > > Most of z3fold operations are in-page, such as modifying z3fold > page header or moving z3fold objects within a page. Taking > per-pool spinlock to protect per-page objects is therefore > suboptimal, and the idea of having a per-page spinlock (or rwlock) > has been around for some time. However, adding one directly to the > z3fold header makes the latter quite big on some systems so that > it won't fit in a signle chunk. > > This patch implements spinlock-based per-page locking mechanism > which is lightweight enough to fit into the z3fold header.
