On Tue, Sep 20, 2022 at 05:47:33PM -0700, Isaac Manjarres wrote: > On Mon, Jul 18, 2022 at 06:53:43PM +0100, Catalin Marinas wrote: > > So do I but holidays get in the way ;). I plan to refresh my kmalloc > > minalign series at the end of August. > > > > One significant change I have though is that now ARCH_KMALLOC_MINALIGN > > now goes down all the way to 8 and using swiotlb bounce buffering if the > > DMA mapping size is small. > > This sounds like a good idea for optimizing kmalloc's memory usage > beyond what this series originally achieved. I'm sure a few other things > have come up in the meantime, but I was curious to know if you had a > chance to get back to this? I started refreshing the series but I got stuck on having to do bouncing for small buffers even if when they go through the iommu (and I don't have the set up to test it yet). I hope to post something when the merging window closes. In the meantime, I pushed my work-in-progress patches to: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux devel/kmalloc-minalign-v2-wip Apart from the iommu think, I still need to figure out whether with an ARCH_DMA_MINALIGN of 128 we need to disable the kmalloc-192 cache (so far I don't think it's needed). There are no additional changes to the crypto code from the last series, I still set CRYPTO_MINALIGN to ARCH_DMA_MINALIGN (without any other patches, crypto DMA will break; so I need to see how it interacts with Herbert's series). Anyway, I hope for more discussions once 6.1-rc1 is out. -- Catalin
