On Wed, 27 Feb 2013 09:51:39 +0000 Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx> wrote: > On Wed, Feb 27, 2013 at 04:36:47PM +0900, Kyungsik Lee wrote: > > Compiler: Linaro ARM gcc 4.6.2 > > 2. ARMv7, 1.7GHz based board > > Kernel: linux 3.7 > > Uncompressed Kernel Size: 14MB > > Compressed Size Decompression Speed > > LZO 6.0MB 34.1MB/s Old > > ---------------------------------------- > > 6.0MB 34.7MB/s New > > 6.0MB 52.2MB/s(UA) > > ============================================= > > LZ4 6.5MB 86.7MB/s > > UA: Unaligned memory Access support > > That is pretty conclusive - it shows an 8% increase in image size vs a > 66% increase in decompression speed. It will take a _lot_ to offset > that increase in decompression speed. > > So, what I think is that yes, we should accept LZ4 and drop LZO from > the kernel - the "fast but may not be small" compression title has > clearly been taken by LZ4. > > Akpm - what's your thoughts? It sounds like we should merge both. I've sent Linus a little reminder for Markus's 3.9 pull request. Let's get down and review and test this new code? David's review comments were useful. I'd like to also see a Kconfig patch which makes x86 and arm kernels default to the new LZ4 code. Then I can sneak that patch into linux-next so the new code will get some testing. If we don't do that, very few people will run it. -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
