On Mon, Mar 23, 2020 at 05:05:03PM +0900, Jaewon Kim wrote: > In Android system ion system heap size is huge like hundreds of MB. To > know overal system memory usage, include ion system heap size in > proc/meminfo_extra. > > To include heap size, use register_meminfo_extra introduced in previous > patch. > > Prior to register we need to add stats to show the ion heap usage. Add > total_allocated into ion heap and count it on allocation and freeing. In > a ion heap using ION_HEAP_FLAG_DEFER_FREE, a buffer can be freed from > user but still live on deferred free list. Keep stats until the buffer > is finally freed so that we can cover situation of deferred free thread > stuck problem. > > i.e) cat /proc/meminfo_extra | grep IonSystemHeap > IonSystemHeap: 242620 kB > > i.e.) show_mem on oom > <6>[ 420.856428] Mem-Info: > <6>[ 420.856433] IonSystemHeap:32813kB > > Signed-off-by: Jaewon Kim <jaewon31.kim@xxxxxxxxxxx> > --- > drivers/staging/android/ion/ion.c | 2 ++ > drivers/staging/android/ion/ion.h | 1 + > drivers/staging/android/ion/ion_system_heap.c | 2 ++ > 3 files changed, 5 insertions(+) Does this really give the proper granularity that ion users have? I thought they wanted to know what each heap was doing. Also, this code should be deleted really soon now, so I would not make any core changes to the kernel based on it at all. thanks, greg k-h
