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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2015-06-07 11:37:04 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-06-09 12:24:32 +0200 |
| commit | cd4996dce18b619bd7b3acf75c91f49c77f05a97 (patch) | |
| tree | a6c7e86ec06dd96684b9968b92336ee0f700579d | |
| parent | 2a1dcb1f796ad37028df37d96fc7c5b6b1705a43 (diff) | |
| download | linux-cd4996dce18b619bd7b3acf75c91f49c77f05a97.tar.bz2 | |
x86/mpx: Trace allocation of new bounds tables
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>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave@sr71.net>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20150607183704.EC23A93E@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/include/asm/trace/mpx.h | 16 | ||||
| -rw-r--r-- | arch/x86/mm/mpx.c | 1 |
2 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/include/asm/trace/mpx.h b/arch/x86/include/asm/trace/mpx.h index c13c6fa3fa92..173dd3ba108c 100644 --- a/arch/x86/include/asm/trace/mpx.h +++ b/arch/x86/include/asm/trace/mpx.h @@ -95,6 +95,22 @@ DEFINE_EVENT(mpx_range_trace, mpx_unmap_search, 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 --git a/arch/x86/mm/mpx.c b/arch/x86/mm/mpx.c index 55729ee9263e..c17fd27579af 100644 --- a/arch/x86/mm/mpx.c +++ b/arch/x86/mm/mpx.c @@ -483,6 +483,7 @@ static int allocate_bt(long __user *bd_entry) 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); |