linux-kernel - [PATCH 5.15 693/846] drm/nouveau/kms/nv04: use vzalloc for nv04

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Message-Id: <20220124184124.950008539@linuxfoundation.org>
Date:   Mon, 24 Jan 2022 19:43:30 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, "Nathan E. Egge" <unlord@...h.org>,
        Ilia Mirkin <imirkin@...m.mit.edu>,
        Ben Skeggs <bskeggs@...hat.com>,
        Karol Herbst <kherbst@...hat.com>
Subject: [PATCH 5.15 693/846] drm/nouveau/kms/nv04: use vzalloc for nv04_display

From: Ilia Mirkin <imirkin@...m.mit.edu>

commit bd6e07e72f37f34535bec7eebc807e5fcfe37b43 upstream.

The struct is giant, and triggers an order-7 allocation (512K). There is
no reason for this to be kmalloc-type memory, so switch to vmalloc. This
should help loading nouveau on low-memory and/or long-running systems.

Reported-by: Nathan E. Egge <unlord@...h.org>
Signed-off-by: Ilia Mirkin <imirkin@...m.mit.edu>
Cc: stable@...r.kernel.org
Signed-off-by: Ben Skeggs <bskeggs@...hat.com>
Reviewed-by: Karol Herbst <kherbst@...hat.com>
Signed-off-by: Karol Herbst <kherbst@...hat.com>
Link: https://gitlab.freedesktop.org/drm/nouveau/-/merge_requests/10
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/nouveau/dispnv04/disp.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/nouveau/dispnv04/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv04/disp.c
@@ -205,7 +205,7 @@ nv04_display_destroy(struct drm_device *
 	nvif_notify_dtor(&disp->flip);
 
 	nouveau_display(dev)->priv = NULL;
-	kfree(disp);
+	vfree(disp);
 
 	nvif_object_unmap(&drm->client.device.object);
 }
@@ -223,7 +223,7 @@ nv04_display_create(struct drm_device *d
 	struct nv04_display *disp;
 	int i, ret;
 
-	disp = kzalloc(sizeof(*disp), GFP_KERNEL);
+	disp = vzalloc(sizeof(*disp));
 	if (!disp)
 		return -ENOMEM;