From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752988AbbDAAqZ (ORCPT ); Tue, 31 Mar 2015 20:46:25 -0400 Received: from mga01.intel.com ([192.55.52.88]:10843 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752881AbbDAAqT (ORCPT ); Tue, 31 Mar 2015 20:46:19 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,503,1422950400"; d="scan'208";a="701158918" Subject: [PATCH 06/16] x86, mpx: trace allocation of new bounds tables To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, tglx@linutronix.de, Dave Hansen , dave.hansen@linux.intel.com From: Dave Hansen Date: Tue, 31 Mar 2015 17:46:31 -0700 References: <20150401004623.894DF37A@viggo.jf.intel.com> In-Reply-To: <20150401004623.894DF37A@viggo.jf.intel.com> Message-Id: <20150401004631.5BD41E85@viggo.jf.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dave Hansen Bounds tables are a significant consumer of memory. It is important to know when they are being allocated. Add a trace point to trace whenever an allocation occurs and also its virtual address. Signed-off-by: Dave Hansen --- b/arch/x86/include/asm/trace/mpx.h | 16 ++++++++++++++++ b/arch/x86/mm/mpx.c | 1 + 2 files changed, 17 insertions(+) diff -puN arch/x86/include/asm/trace/mpx.h~trace_mpx_new_bounds_table arch/x86/include/asm/trace/mpx.h --- a/arch/x86/include/asm/trace/mpx.h~trace_mpx_new_bounds_table 2015-03-31 16:41:57.623342307 -0700 +++ b/arch/x86/include/asm/trace/mpx.h 2015-03-31 16:41:57.627342488 -0700 @@ -85,6 +85,22 @@ DEFINE_EVENT(mpx_range_trace, mpx_unmap_ TP_ARGS(start, end) ); +TRACE_EVENT(mpx_new_bounds_table, + + TP_PROTO(unsigned long table_vaddr), + TP_ARGS(table_vaddr), + + TP_STRUCT__entry( + __field(unsigned long, table_vaddr) + ), + + TP_fast_assign( + __entry->table_vaddr = table_vaddr; + ), + + TP_printk("table vaddr:%p", (void *)__entry->table_vaddr) +); + #else /* diff -puN arch/x86/mm/mpx.c~trace_mpx_new_bounds_table arch/x86/mm/mpx.c --- a/arch/x86/mm/mpx.c~trace_mpx_new_bounds_table 2015-03-31 16:41:57.624342353 -0700 +++ b/arch/x86/mm/mpx.c 2015-03-31 16:41:57.628342533 -0700 @@ -485,6 +485,7 @@ static int allocate_bt(long __user *bd_e ret = -EINVAL; goto out_unmap; } + trace_mpx_new_bounds_table(bt_addr); return 0; out_unmap: vm_munmap(bt_addr & MPX_BT_ADDR_MASK, MPX_BT_SIZE_BYTES); _