Re: [PATCH v6 5/6] mm: secretmem: use PMD-size pages to amortize direct map fragmentation
From: Peter Zijlstra <peterz@infradead.org>
Date: 2020-09-30 10:44:12
Also in:
linux-arch, linux-arm-kernel, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml, nvdimm
On Wed, Sep 30, 2020 at 01:20:31PM +0300, Mike Rapoport wrote:
I tried to dig the regression report in the mailing list, and the best I could find is https://lore.kernel.org/lkml/20190823052335.572133-1-songliubraving@fb.com/ (local) which does not mention the actual performance regression but it only complaints about kernel text mapping being split into 4K pages. Any chance you have the regression report handy?
I think the saga started here: 20190820075128.2912224-1-songliubraving@fb.com 20190820202314.1083149-1-songliubraving@fb.com 20190823052335.572133-1-songliubraving@fb.com After that Thomas did the patch I referred to earlier and I endeavoured to rewrite x86-ftrace. I added Song to CC, maybe he can remember more.