Commit-ID: cd4996dce18b619bd7b3acf75c91f49c77f05a97 Gitweb: http://git.kernel.org/tip/cd4996dce18b619bd7b3acf75c91f49c77f05a97 Author: Dave Hansen <[email protected]> AuthorDate: Sun, 7 Jun 2015 11:37:04 -0700 Committer: Ingo Molnar <[email protected]> CommitDate: Tue, 9 Jun 2015 12:24:32 +0200
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 <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Dave Hansen <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/include/asm/trace/mpx.h | 16 ++++++++++++++++ arch/x86/mm/mpx.c | 1 + 2 files changed, 17 insertions(+) diff --git a/arch/x86/include/asm/trace/mpx.h b/arch/x86/include/asm/trace/mpx.h index c13c6fa..173dd3b 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 55729ee..c17fd27 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
