Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932600AbaJWMvl (ORCPT ); Thu, 23 Oct 2014 08:51:41 -0400 Received: from lgeamrelo04.lge.com ([156.147.1.127]:63726 "EHLO lgeamrelo04.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932432AbaJWMve (ORCPT ); Thu, 23 Oct 2014 08:51:34 -0400 X-Original-SENDERIP: 165.186.175.39 X-Original-MAILFROM: gioh.kim@lge.com From: Gioh Kim To: Greg Kroah-Hartman , John Stultz , Rebecca Schultz Zavin Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, gunho.lee@lge.com, gioh.kim@lge.com Subject: [RFC 2/2] staging: ion: debugfs to shrink pool Date: Thu, 23 Oct 2014 21:52:20 +0900 Message-Id: <1414068740-9553-3-git-send-email-gioh.kim@lge.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1414068740-9553-1-git-send-email-gioh.kim@lge.com> References: <1414068740-9553-1-git-send-email-gioh.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch creates debugfs files, /sys/kernel/debug/ion/heaps/system_shrink, to shrink pool or get pool size. Reading the file returns pool size and writing occurs to shrink pool. Signed-off-by: Gioh Kim --- drivers/staging/android/ion/ion.c | 31 ++++++++----------------------- 1 file changed, 8 insertions(+), 23 deletions(-) diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 290d4d2..ecc1121 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -1463,43 +1463,29 @@ static const struct file_operations debug_heap_fops = { .release = single_release, }; -#ifdef DEBUG_HEAP_SHRINKER static int debug_shrink_set(void *data, u64 val) { struct ion_heap *heap = data; - struct shrink_control sc; int objs; - sc.gfp_mask = -1; - sc.nr_to_scan = 0; - - if (!val) - return 0; - - objs = heap->shrinker.shrink(&heap->shrinker, &sc); - sc.nr_to_scan = objs; + if (val) + objs = val; + else + objs = heap->ops->shrink(heap, __GFP_HIGHMEM, 0); - heap->shrinker.shrink(&heap->shrinker, &sc); + (void)heap->ops->shrink(heap, __GFP_HIGHMEM, objs); return 0; } static int debug_shrink_get(void *data, u64 *val) { struct ion_heap *heap = data; - struct shrink_control sc; - int objs; - - sc.gfp_mask = -1; - sc.nr_to_scan = 0; - - objs = heap->shrinker.shrink(&heap->shrinker, &sc); - *val = objs; + *val = heap->ops->shrink(heap, __GFP_HIGHMEM, 0); return 0; } DEFINE_SIMPLE_ATTRIBUTE(debug_shrink_fops, debug_shrink_get, debug_shrink_set, "%llu\n"); -#endif void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap) { @@ -1534,8 +1520,7 @@ void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap) path, heap->name); } -#ifdef DEBUG_HEAP_SHRINKER - if (heap->shrinker.shrink) { + if (heap->ops->shrink) { char debug_name[64]; snprintf(debug_name, 64, "%s_shrink", heap->name); @@ -1550,7 +1535,7 @@ void ion_device_add_heap(struct ion_device *dev, struct ion_heap *heap) path, debug_name); } } -#endif + up_write(&dev->lock); } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/