From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx204.postini.com [74.125.245.204]) by kanga.kvack.org (Postfix) with SMTP id 1A2206B00E7 for ; Mon, 14 May 2012 04:45:14 -0400 (EDT) From: Minchan Kim Subject: [PATCH 3/3] x86: Support local_flush_tlb_kernel_range Date: Mon, 14 May 2012 17:45:33 +0900 Message-Id: <1336985134-31967-3-git-send-email-minchan@kernel.org> In-Reply-To: <1336985134-31967-1-git-send-email-minchan@kernel.org> References: <1336985134-31967-1-git-send-email-minchan@kernel.org> Sender: owner-linux-mm@kvack.org List-ID: To: Greg Kroah-Hartman Cc: Nitin Gupta , Seth Jennings , Dan Magenheimer , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Minchan Kim , Thomas Gleixner , Ingo Molnar , Tejun Heo , David Howells , x86@kernel.org The zsmalloc [un]maps non-physical contiguos pages to contiguous virual address frequently so it needs frequent tlb-flush. Now x86 doesn't support common utility function for flushing just a few tlb entries so zsmalloc have been used set_pte and __flush_tlb_one which are x86 specific functions. It means zsmalloc have a dependency with x86. This patch adds new function, local_flush_tlb_kernel_range which are good candidate for being common utility function because other architecture(ex, MIPS, sh, unicore32, arm, score) already have supportd it. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Tejun Heo Cc: David Howells Cc: x86@kernel.org Signed-off-by: Minchan Kim --- arch/x86/include/asm/tlbflush.h | 12 ++++++++++++ drivers/staging/zsmalloc/Kconfig | 2 +- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h index 4ece077..6e1253a 100644 --- a/arch/x86/include/asm/tlbflush.h +++ b/arch/x86/include/asm/tlbflush.h @@ -172,4 +172,16 @@ static inline void flush_tlb_kernel_range(unsigned long start, flush_tlb_all(); } +static inline void local_flush_tlb_kernel_range(unsigned long start, + unsigned long end) +{ + if (cpu_has_invlpg) { + while (start < end) { + __flush_tlb_single(start); + start += PAGE_SIZE; + } + } else + local_flush_tlb(); +} + #endif /* _ASM_X86_TLBFLUSH_H */ diff --git a/drivers/staging/zsmalloc/Kconfig b/drivers/staging/zsmalloc/Kconfig index def2483..29819b8 100644 --- a/drivers/staging/zsmalloc/Kconfig +++ b/drivers/staging/zsmalloc/Kconfig @@ -3,7 +3,7 @@ config ZSMALLOC # arch dependency is because of the use of local_unmap_kernel_range # in zsmalloc-main.c. # TODO: implement local_unmap_kernel_range in all architecture. - depends on (ARM || MIPS || SUPERH) + depends on (ARM || MIPS || SUPERH || X86) default n help zsmalloc is a slab-based memory allocator designed to store -- 1.7.9.5 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org