Re: [PATCH v1 0/2] Free contiguous order-0 pages efficiently

[Uladzislau Rezki]

On Tue, Jan 06, 2026 at 04:38:39AM +0000, Matthew Wilcox wrote:
> On Mon, Jan 05, 2026 at 04:17:36PM +0000, Ryan Roberts wrote:
> > Hi All,
> > 
> > A recent change to vmalloc caused some performance benchmark regressions (see
> > [1]). I'm attempting to fix that (and at the same time signficantly improve
> 
> Unfortunately, there was no [1] ... I'm not sure this benchmark is
> really doing anything representative.  But the performance improvement
> is certainly welcome; we'd deferred work on that for later.
>
When discussed the high-order preference allocation patch, i noticed
a difference in behaviour right away. Further investigation showed that
the free path also needs to be improved to fully benefit from that change.

I can document the test-cases in the test_vmalloc.c if it helps. Also
i can add more focused benchmarks for allocation and free paths.

--
Uladzislau Rezki