kmemtrace: Core implementation.

kmemtrace provides tracing for slab allocator functions, such as kmalloc,
kfree, kmem_cache_alloc, kmem_cache_free etc.. Collected data is then fed
to the userspace application in order to analyse allocation hotspots,
internal fragmentation and so on, making it possible to see how well an
allocator performs, as well as debug and profile kernel code.

Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>

1 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e0f346d201ed..542c2d8843db 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -49,6 +49,7 @@ parameter is applicable:
         ISAPNP  ISA PnP code is enabled.
         ISDN    Appropriate ISDN support is enabled.
         JOY     Appropriate joystick support is enabled.
+        KMEMTRACE kmemtrace is enabled.
         LIBATA  Libata driver is enabled
         LP      Printer support is enabled.
         LOOP    Loopback device support is enabled.
@@ -1018,6 +1019,15 @@ and is between 256 and 4096 characters. It is defined in the file
                         use the HighMem zone if it exists, and the Normal
                         zone if it does not.
 
+        kmemtrace.enable=       [KNL,KMEMTRACE] Format: { yes | no }
+                                Controls whether kmemtrace is enabled
+                                at boot-time.
+
+        kmemtrace.subbufs=n     [KNL,KMEMTRACE] Overrides the number of
+                        subbufs kmemtrace's relay channel has. Set this
+                        higher than default (KMEMTRACE_N_SUBBUFS in code) if
+                        you experience buffer overruns.
+
         movablecore=nn[KMG]     [KNL,X86-32,IA-64,PPC,X86-64] This parameter
                         is similar to kernelcore except it specifies the
                         amount of memory used for migratable allocations.