From: "Christian König" <christian.koenig@amd.com>
To: Mike Galbraith <efault@gmx.de>, lkml <linux-kernel@vger.kernel.org>
Cc: nouveau@lists.freedesktop.org, Ben Skeggs <bskeggs@redhat.com>,
Dave Airlie <airlied@redhat.com>
Subject: Re: [Nouveau] drm/nouneau: 5.11 cycle regression bisected to 461619f5c324 "drm/nouveau: switch to new allocator"
Date: Wed, 10 Feb 2021 11:52:11 +0100 [thread overview]
Message-ID: <bfd62492-e6a9-3899-dd7d-87b7800f45c7@amd.com> (raw)
In-Reply-To: <2793c200beb530ed4a8ac32c5eea0f5aaa53c7e8.camel@gmx.de>
Am 10.02.21 um 11:46 schrieb Mike Galbraith:
> On Wed, 2021-02-10 at 11:34 +0100, Christian König wrote:
>> What seems to happen here is that your system is low on resources and we
>> just try to free up pages.
> FWIW, box has oodles generic ram free right after boot.
Then I have no idea what happens here.
The returned pages are identical, only the overhead to allocate them is
reduced significantly.
The only other idea I have is that this somehow changes the timing and
exposes a bug somewhere else.
You could try to replace the "for (order = min(MAX_ORDER - 1UL,
__fls(num_pages)); num_pages;" in ttm_pool_alloc() with "for (order = 0;
num_pages;" to get the old behavior.
Regards,
Christian.
>
> -Mike
>
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next prev parent reply other threads:[~2021-02-10 10:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-10 10:13 [Nouveau] drm/nouneau: 5.11 cycle regression bisected to 461619f5c324 "drm/nouveau: switch to new allocator" Mike Galbraith
2021-02-10 10:34 ` Christian König
2021-02-10 10:40 ` Mike Galbraith
2021-02-10 10:42 ` Christian König
2021-02-10 11:06 ` Mike Galbraith
2021-02-10 10:46 ` Mike Galbraith
2021-02-10 10:52 ` Christian König [this message]
2021-02-10 11:22 ` Mike Galbraith
2021-02-10 11:44 ` Christian König
2021-02-10 12:22 ` Mike Galbraith
2021-02-10 13:26 ` Christian König
2021-02-10 15:30 ` Mike Galbraith
2021-02-10 15:34 ` Christian König
2021-02-10 15:37 ` Mike Galbraith
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