lkml.org 
[lkml]   [2022]   [Oct]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4/7] mm/vmalloc: Use a trace_alloc_vmap_area event
    Date
    This is for debug purpose and is called when an allocation
    attempt occurs. This event gives some information about:
    - a start address of allocated area;
    - a size that is requested;
    - an align that is required;
    - vstart/vend restriction;
    - if an allocation fails.

    Cc: Steven Rostedt <rostedt@goodmis.org>
    Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
    ---
    mm/vmalloc.c | 5 +++++
    1 file changed, 5 insertions(+)

    diff --git a/mm/vmalloc.c b/mm/vmalloc.c
    index 83b54beb12fa..f4397817ccd7 100644
    --- a/mm/vmalloc.c
    +++ b/mm/vmalloc.c
    @@ -43,6 +43,9 @@
    #include <asm/tlbflush.h>
    #include <asm/shmparam.h>

    +#define CREATE_TRACE_POINTS
    +#include <trace/events/vmap.h>
    +
    #include "internal.h"
    #include "pgalloc-track.h"

    @@ -1621,6 +1624,8 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
    size, align, vstart, vend);
    spin_unlock(&free_vmap_area_lock);

    + trace_alloc_vmap_area(addr, size, align, vstart, vend, addr == vend);
    +
    /*
    * If an allocation fails, the "vend" address is
    * returned. Therefore trigger the overflow path.
    --
    2.30.2
    \
     
     \ /
      Last update: 2022-10-17 18:03    [W:3.985 / U:0.188 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site