From 5ad08be7e34fc6f3c6936ac40063ea839d4ce0d2 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 7 Apr 2017 11:25:51 +0100
Subject: [PATCH] drm/i915: Break up long runs of freeing objects
Git-commit: 5ad08be7e34fc6f3c6936ac40063ea839d4ce0d2
Patch-mainline: v4.13-rc1
References: FATE#322643 bsc#1055900
Before freeing the next batch of objects from the worker, check if the
worker's timeslice has expired and if so, defer the next batch to the
next invocation of the worker.
Suggested-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170407102552.5781-3-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/i915/i915_gem.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4374,8 +4374,11 @@ static void __i915_gem_free_work(struct
* unbound now.
*/
- while ((freed = llist_del_all(&i915->mm.free_list)))
+ while ((freed = llist_del_all(&i915->mm.free_list))) {
__i915_gem_free_objects(i915, freed);
+ if (need_resched())
+ break;
+ }
}
static void __i915_gem_free_object_rcu(struct rcu_head *head)