Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757330Ab2FYQs2 (ORCPT ); Mon, 25 Jun 2012 12:48:28 -0400 Received: from e5.ny.us.ibm.com ([32.97.182.145]:57783 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757169Ab2FYQs1 (ORCPT ); Mon, 25 Jun 2012 12:48:27 -0400 From: Seth Jennings To: Greg Kroah-Hartman Cc: Seth Jennings , Andrew Morton , Dan Magenheimer , Konrad Rzeszutek Wilk , Nitin Gupta , Minchan Kim , Robert Jennings , linux-mm@kvack.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/3] zsmalloc: remove x86 dependency Date: Mon, 25 Jun 2012 11:14:35 -0500 Message-Id: <1340640878-27536-1-git-send-email-sjenning@linux.vnet.ibm.com> X-Mailer: git-send-email 1.7.9.5 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12062516-5930-0000-0000-000009425CEA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2159 Lines: 55 This patchset continues/adapts Minchan Kim's work to remove the x86 dependency from zsmalloc. However, instead of whitelisting archs with support for local_tlb_flush_kernel_range() in the zsmalloc Kconfig, this patchset allows zsmalloc to work with all archs through the addition of a generic/portable page mapping methods (i.e. memcpy) when the required tlb flushing functionality is not supported by the arch. The arch advertises support for local_tlb_flush_kernel_range() by defining __HAVE_LOCAL_FLUSH_TLB_KERNEL_RANGE The third patch in the set adds local_tlb_flush_kernel_range() support to x86. In my single-threaded tests using zcache, using the pte/tlb mapping method was 40% faster than the generic method. So while the third patch is optional, it is highly recommended. Alex Shi is working on a large x86 patchset that includes functionality similar to the third patch, however, it seems that this patchset is getting very little attention and includes much more than is needed for zsmalloc's purposes. https://lkml.org/lkml/2012/6/12/116 Future work: - Add __HAVE_LOCAL_FLUSH_TLB_KERNEL_RANGE definition to archs that already have local_tlb_flush_kernel_range() - Add mapping mode flags (RO, WO, RW) to zs_map_object() to avoid unnecessary copies in the generic case Based on Greg's staging-next. Seth Jennings (3): zram/zcache: swtich Kconfig dependency from X86 to ZSMALLOC zsmalloc: add generic path and remove x86 dependency x86: add local_tlb_flush_kernel_range() arch/x86/include/asm/tlbflush.h | 21 +++++ drivers/staging/zcache/Kconfig | 5 +- drivers/staging/zram/Kconfig | 5 +- drivers/staging/zsmalloc/Kconfig | 4 - drivers/staging/zsmalloc/zsmalloc-main.c | 136 ++++++++++++++++++++++++------ drivers/staging/zsmalloc/zsmalloc_int.h | 5 +- 6 files changed, 138 insertions(+), 38 deletions(-) -- 1.7.9.5 -- 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/