linux-kernel - Re: [PATCH 2/2] drm: Revert syncobj timeline changes.

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Message-ID: <6773eadb-5c15-8168-9bba-5e1cfd1c3194@amd.com>
Date:   Fri, 21 Dec 2018 18:45:08 +0000
From:   "Koenig, Christian" <Christian.Koenig@....com>
To:     Dmitry Osipenko <digetx@...il.com>, Eric Anholt <eric@...olt.net>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>
CC:     Daniel Vetter <daniel.vetter@...ll.ch>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Jason Ekstrand <jason@...kstrand.net>
Subject: Re: [PATCH 2/2] drm: Revert syncobj timeline changes.

Am 21.12.18 um 19:35 schrieb Dmitry Osipenko:
> On 21.12.2018 21:27, Christian König wrote:
>> Am 19.12.18 um 18:53 schrieb Dmitry Osipenko:
>>> [SNIP]
>>>> @@ -931,9 +718,6 @@ static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs,
>>>>          if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) {
>>>>            for (i = 0; i < count; ++i) {
>>>> -            if (entries[i].fence)
>>>> -                continue;
>>>> -
>>>>                drm_syncobj_fence_get_or_add_callback(syncobjs[i],
>>>>                                      &entries[i].fence,
>>>>                                      &entries[i].syncobj_cb,
>>> Hello,
>>>
>>> The above three removed lines we added in commit 337fe9f5c1e7de ("drm/syncobj: Don't leak fences when WAIT_FOR_SUBMIT is set") that fixed a memleak. Removal of the lines returns the memleak because of disbalanced fence refcounting and it looks like they were removed unintentionally in this patch.
>> That was already fixed with 61a98b1b9a8c7 drm/syncobj: remove drm_syncobj_cb and cleanup.
>>
>> This cleanup removed all the duplicate checking and is now adding the callback only once.
> Okay, though that commit is not in linux-next. I assume it will show up eventually.

Need to double check, that could indeed be a problem.

Christian.