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From: Tejun Heo <tj@kernel.org>
To: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>
Cc: intel-xe@lists.freedesktop.org,
	"Natalie Vock" <natalie.vock@gmx.de>,
	"Johannes Weiner" <hannes@cmpxchg.org>,
	"Michal Koutný" <mkoutny@suse.com>,
	cgroups@vger.kernel.org, "Huang Rui" <ray.huang@amd.com>,
	"Matthew Brost" <matthew.brost@intel.com>,
	"Matthew Auld" <matthew.auld@intel.com>,
	"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
	"Maxime Ripard" <mripard@kernel.org>,
	"Thomas Zimmermann" <tzimmermann@suse.de>,
	"Simona Vetter" <simona@ffwll.ch>,
	"David Airlie" <airlied@gmail.com>,
	"Christian König" <christian.koenig@amd.com>,
	"Thadeu Lima de Souza Cascardo" <cascardo@igalia.com>,
	"Alex Deucher" <alexander.deucher@amd.com>,
	"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
	dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 3/6] cgroup/dmem: Add reclaim callback for lowering max below current usage
Date: Mon, 6 Jul 2026 09:25:10 -1000	[thread overview]
Message-ID: <akwBFlw8MwhrwsRu@slm.duckdns.org> (raw)
In-Reply-To: <20260703130541.2686-4-thomas.hellstrom@linux.intel.com>

Hello,

On Fri, Jul 03, 2026 at 03:05:38PM +0200, Thomas Hellström wrote:
> Also honor O_NONBLOCK so that if that flag is set during the
> max value write, no reclaim is initiated. The idea is to avoid
> charging the reclaim cost to the writer of the max value.

Is this really necessary? I'm not necessarily against it but this is trivial
to work around from userspace and feels like a gratuitous addition. What's
the use case?

Thanks.

-- 
tejun

  parent reply	other threads:[~2026-07-06 19:25 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-03 13:05 [PATCH v7 0/6] Add reclaim to the dmem cgroup controller Thomas Hellström
2026-07-03 13:05 ` [PATCH v7 1/6] drm/amdgpu: Fix init ordering in amdgpu_vram_mgr_init() Thomas Hellström
2026-07-03 13:08   ` Christian König
2026-07-03 13:11     ` Thomas Hellström
2026-07-03 13:26   ` sashiko-bot
2026-07-03 13:05 ` [PATCH v7 2/6] cgroup/dmem: Introduce struct dmem_cgroup_init for region initialization Thomas Hellström
2026-07-03 13:05 ` [PATCH v7 3/6] cgroup/dmem: Add reclaim callback for lowering max below current usage Thomas Hellström
2026-07-03 13:24   ` sashiko-bot
2026-07-06 19:25   ` Tejun Heo [this message]
2026-07-07  7:20     ` Thomas Hellström
2026-07-03 13:05 ` [PATCH v7 4/6] drm/ttm: Hook up a cgroup-aware reclaim callback for the dmem controller Thomas Hellström
2026-07-03 13:19   ` sashiko-bot
2026-07-03 13:05 ` [PATCH v7 5/6] drm/xe: Wire up dmem cgroup reclaim for VRAM manager Thomas Hellström
2026-07-03 13:05 ` [PATCH v7 6/6] drm/amdgpu: " Thomas Hellström
2026-07-03 13:25   ` sashiko-bot
2026-07-03 13:27 ` ✗ CI.checkpatch: warning for Add reclaim to the dmem cgroup controller (rev7) Patchwork
2026-07-03 13:28 ` ✓ CI.KUnit: success " Patchwork
2026-07-03 14:11 ` ✓ Xe.CI.BAT: " Patchwork
2026-07-03 14:37 ` [PATCH v7 0/6] Add reclaim to the dmem cgroup controller Thadeu Lima de Souza Cascardo
2026-07-04  0:07 ` ✗ Xe.CI.FULL: failure for Add reclaim to the dmem cgroup controller (rev7) Patchwork

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