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From: Dave Hansen <dave@sr71.net>
To: linux-kernel@vger.kernel.org
Cc: x86@kernel.org, tglx@linutronix.de, Dave Hansen <dave@sr71.net>,
	dave.hansen@linux.intel.com
Subject: [PATCH 11/19] x86, mpx: trace allocation of new bounds tables
Date: Mon, 18 May 2015 23:25:32 -0700	[thread overview]
Message-ID: <20150519062532.B78B40F2@viggo.jf.intel.com> (raw)
In-Reply-To: <20150519062528.E2D5DDFF@viggo.jf.intel.com>


From: Dave Hansen <dave.hansen@linux.intel.com>

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 <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

---

 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	2015-05-18 17:49:01.996560861 -0700
+++ b/arch/x86/include/asm/trace/mpx.h	2015-05-18 17:49:02.001561087 -0700
@@ -94,6 +94,22 @@ 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	2015-05-18 17:49:01.997560906 -0700
+++ b/arch/x86/mm/mpx.c	2015-05-18 17:49:02.001561087 -0700
@@ -483,6 +483,7 @@ 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);
_

  parent reply	other threads:[~2015-05-19  6:27 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-19  6:25 [PATCH 00/19] x86, mpx updates for 4.2 (take 7) Dave Hansen
2015-05-19  6:25 ` [PATCH 01/19] x86, mpx, xsave: Fix up bad get_xsave_addr() assumptions Dave Hansen
2015-05-19  6:25 ` [PATCH 02/19] x86, fpu: Wrap get_xsave_addr() to make it safer Dave Hansen
2015-05-19  8:15   ` Thomas Gleixner
2015-05-19  6:25 ` [PATCH 03/19] x86, mpx: Use new get_xsave_field_ptr() Dave Hansen
2015-05-19  8:16   ` Thomas Gleixner
2015-05-19  6:25 ` [PATCH 04/19] x86, mpx: Cleanup: Do not pass task around when unnecessary Dave Hansen
2015-05-19  8:16   ` Thomas Gleixner
2015-05-19  6:25 ` [PATCH 05/19] x86, mpx: remove redundant MPX_BNDCFG_ADDR_MASK Dave Hansen
2015-05-19  6:25 ` [PATCH 07/19] x86, mpx: boot-time disable Dave Hansen
2015-05-19  6:25 ` [PATCH 06/19] x86, mpx: Restrict mmap size check to bounds tables Dave Hansen
2015-05-19  6:25 ` [PATCH 08/19] x86, mpx: trace #BR exceptions Dave Hansen
2015-05-19  6:25 ` [PATCH 09/19] x86, mpx: trace entry to bounds exception paths Dave Hansen
2015-05-19  8:17   ` Thomas Gleixner
2015-05-19  6:25 ` Dave Hansen [this message]
2015-05-19  6:25 ` [PATCH 10/19] x86, mpx: Trace the attempts to find bounds tables Dave Hansen
2015-05-19  8:17   ` Thomas Gleixner
2015-05-19  6:25 ` [PATCH 13/19] x86, mpx: Add temporary variable to reduce masking Dave Hansen
2015-05-19  6:25 ` [PATCH 12/19] x86: make is_64bit_mm() widely available Dave Hansen
2015-05-19  6:25 ` [PATCH 17/19] x86, mpx: rewrite unmap code Dave Hansen
2015-05-19  6:25 ` [PATCH 15/19] x86, mpx: do 32-bit-only cmpxchg for 32-bit apps Dave Hansen
2015-05-19  8:18   ` Thomas Gleixner
2015-05-19  6:25 ` [PATCH 14/19] x86, mpx: new directory entry to addr helper Dave Hansen
2015-05-19  6:25 ` [PATCH 16/19] x86, mpx: support 32-bit binaries on 64-bit kernel Dave Hansen
2015-05-19  8:21   ` Thomas Gleixner
2015-05-19  6:25 ` [PATCH 18/19] x86, mpx: do not count MPX VMAs as neighbors when unmapping Dave Hansen
2015-05-19  6:25 ` [PATCH 19/19] x86, mpx: allow mixed binaries again Dave Hansen
2015-05-20 10:05 ` [PATCH 00/19] x86, mpx updates for 4.2 (take 7) Ingo Molnar
2015-05-26 16:49   ` Dave Hansen
2015-05-27 12:18     ` Ingo Molnar
  -- strict thread matches above, loose matches on Subject: below --
2015-06-07 18:37 [PATCH 00/19] x86, mpx updates for 4.2 (take 9) Dave Hansen
2015-06-07 18:37 ` [PATCH 11/19] x86, mpx: trace allocation of new bounds tables Dave Hansen
2015-05-27 18:36 [PATCH 00/19] x86, mpx updates for 4.2 (take 8) Dave Hansen
2015-05-27 18:36 ` [PATCH 11/19] x86, mpx: trace allocation of new bounds tables Dave Hansen
2015-05-08 18:59 [PATCH 00/19] x86, mpx updates for 4.2 (take 6) Dave Hansen
2015-05-08 18:59 ` [PATCH 11/19] x86, mpx: trace allocation of new bounds tables Dave Hansen
2015-05-18 21:04   ` Thomas Gleixner

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