From: Ingo Molnar <mingo@elte.hu> To: Linus Torvalds <torvalds@transmeta.com> Subject: [patch] swap-speedup-2.4.3-B3 Date: Tue, 24 Apr 2001 07:44:45 +0200 (CEST) Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Linux Kernel List <linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>, Marcelo Tosatti <marcelo@conectiva.com.br>, Rik van Riel <riel@conectiva.com.br>, Szabolcs Szakacsits <szaka@f-secure.com> the latest swap-speedup patch can be found at: http://people.redhat.com/mingo/swap-speedup/swap-speedup-2.4.3-B3 (the patch is against 2.4.4-pre6 or 2.4.3-ac13.) -B3 includes Marcelo's patch for another area that blocks unnecesserily on locked swapcache pages: async swapcache readahead. Marcello did some tests which shows that this fix brought some nice improvements too. "make -j32 bzImage" using 128MB mem, 128MB swap, 4 CPUs: stock 2.4.3-ac13 ---------------- real 4m0.678s user 4m2.870s sys 0m38.920s swap-speedup-A2 --------------- real 3m24.190s user 4m1.070s sys 0m31.950s swap-speedup-B3 (A2 + Marcelo's swapin-readahead non-blocking patch) --------------- real 3m7.410s user 4m0.940s sys 0m28.680s ie. for this kernel compile test: swap-speedup-A2 is a 18% speedup relative to stock 2.4.3-ac13 swap-speedup-B3 is a 28% speedup relative to stock 2.4.3-ac13 and the amount of CPU time spent in the kernel has been reduced significantly as well. I believe all the correctness and SMP-locking issues have been taken care of in -B3 as well. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/