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tracing: add flag output for kmem events 

This patch changes the output for gfp_flags from being a simple hex value
to the actual names.

  gfp_flags=GFP_ATOMIC  instead of gfp_flags=00000020

And even

  gfp_flags=GFP_KERNEL instead of gfp_flags=000000d0

(Thanks to Frederic Weisbecker for pointing out that the first version
 had a bad order of GFP masks)

[ Impact: more human readable output from tracer ]

Acked-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Steven Rostedt 2009-05-15 16:16:30 -04:00 committed by Frederic Weisbecker
parent 937cdb9db7
commit 62ba180e80
1 changed files with 45 additions and 8 deletions
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53
include/trace/events/kmem.h
View File

@ -7,6 +7,43 @@
#undef TRACE_SYSTEM
#define TRACE_SYSTEM kmem
/*
* The order of these masks is important. Matching masks will be seen
* first and the left over flags will end up showing by themselves.
*
* For example, if we have GFP_KERNEL before GFP_USER we wil get:
*
* GFP_KERNEL|GFP_HARDWALL
*
* Thus most bits set go first.
*/
#define show_gfp_flags(flags) \
(flags) ? __print_flags(flags, "|", \
{(unsigned long)GFP_HIGHUSER_MOVABLE, "GFP_HIGHUSER_MOVABLE"}, \
{(unsigned long)GFP_HIGHUSER, "GFP_HIGHUSER"}, \
{(unsigned long)GFP_USER, "GFP_USER"}, \
{(unsigned long)GFP_TEMPORARY, "GFP_TEMPORARY"}, \
{(unsigned long)GFP_KERNEL, "GFP_KERNEL"}, \
{(unsigned long)GFP_NOFS, "GFP_NOFS"}, \
{(unsigned long)GFP_ATOMIC, "GFP_ATOMIC"}, \
{(unsigned long)GFP_NOIO, "GFP_NOIO"}, \
{(unsigned long)__GFP_HIGH, "GFP_HIGH"}, \
{(unsigned long)__GFP_WAIT, "GFP_WAIT"}, \
{(unsigned long)__GFP_IO, "GFP_IO"}, \
{(unsigned long)__GFP_COLD, "GFP_COLD"}, \
{(unsigned long)__GFP_NOWARN, "GFP_NOWARN"}, \
{(unsigned long)__GFP_REPEAT, "GFP_REPEAT"}, \
{(unsigned long)__GFP_NOFAIL, "GFP_NOFAIL"}, \
{(unsigned long)__GFP_NORETRY, "GFP_NORETRY"}, \
{(unsigned long)__GFP_COMP, "GFP_COMP"}, \
{(unsigned long)__GFP_ZERO, "GFP_ZERO"}, \
{(unsigned long)__GFP_NOMEMALLOC, "GFP_NOMEMALLOC"}, \
{(unsigned long)__GFP_HARDWALL, "GFP_HARDWALL"}, \
{(unsigned long)__GFP_THISNODE, "GFP_THISNODE"}, \
{(unsigned long)__GFP_RECLAIMABLE, "GFP_RECLAIMABLE"}, \
{(unsigned long)__GFP_MOVABLE, "GFP_MOVABLE"} \
) : "GFP_NOWAIT"
TRACE_EVENT(kmalloc,
TP_PROTO(unsigned long call_site,
@ -33,12 +70,12 @@ TRACE_EVENT(kmalloc,
__entry->gfp_flags = gfp_flags;
),
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x",
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s",
__entry->call_site,
__entry->ptr,
__entry->bytes_req,
__entry->bytes_alloc,
__entry->gfp_flags)
show_gfp_flags(__entry->gfp_flags))
);
TRACE_EVENT(kmem_cache_alloc,
@ -67,12 +104,12 @@ TRACE_EVENT(kmem_cache_alloc,
__entry->gfp_flags = gfp_flags;
),
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x",
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s",
__entry->call_site,
__entry->ptr,
__entry->bytes_req,
__entry->bytes_alloc,
__entry->gfp_flags)
show_gfp_flags(__entry->gfp_flags))
);
TRACE_EVENT(kmalloc_node,
@ -104,12 +141,12 @@ TRACE_EVENT(kmalloc_node,
__entry->node = node;
),
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x node=%d",
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d",
__entry->call_site,
__entry->ptr,
__entry->bytes_req,
__entry->bytes_alloc,
__entry->gfp_flags,
show_gfp_flags(__entry->gfp_flags),
__entry->node)
);
@ -142,12 +179,12 @@ TRACE_EVENT(kmem_cache_alloc_node,
__entry->node = node;
),
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%08x node=%d",
TP_printk("call_site=%lx ptr=%p bytes_req=%zu bytes_alloc=%zu gfp_flags=%s node=%d",
__entry->call_site,
__entry->ptr,
__entry->bytes_req,
__entry->bytes_alloc,
__entry->gfp_flags,
show_gfp_flags(__entry->gfp_flags),
__entry->node)
);