linux-kernel - [PATCH v2 1/1] nouveau: ratelimit IRQ messages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1286197890-23227-1-git-send-email-jslaby@suse.cz>
Date:	Mon,  4 Oct 2010 15:11:30 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	airlied@...hat.com
Cc:	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	jirislaby@...il.com, Ben Skeggs <bskeggs@...hat.com>,
	Marcin Slusarz <marcin.slusarz@...il.com>
Subject: [PATCH v2 1/1] nouveau: ratelimit IRQ messages

There are two messages in the ISR of nouveau which might be printed out
hundred times in a second. Ratelimit them. (We need to move
nouveau_ratelimit to the top of the file.)

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Ben Skeggs <bskeggs@...hat.com>
Cc: Marcin Slusarz <marcin.slusarz@...il.com>
---
 drivers/gpu/drm/nouveau/nouveau_irq.c |   23 +++++++++++++----------
 1 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_irq.c b/drivers/gpu/drm/nouveau/nouveau_irq.c
index 794b0ee..5b097b4 100644
--- a/drivers/gpu/drm/nouveau/nouveau_irq.c
+++ b/drivers/gpu/drm/nouveau/nouveau_irq.c
@@ -41,6 +41,13 @@
 #include "nouveau_connector.h"
 #include "nv50_display.h"
 
+static DEFINE_RATELIMIT_STATE(nouveau_ratelimit_state, 3 * HZ, 20);
+
+static int nouveau_ratelimit(void)
+{
+	return __ratelimit(&nouveau_ratelimit_state);
+}
+
 void
 nouveau_irq_preinstall(struct drm_device *dev)
 {
@@ -200,7 +207,9 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
 		}
 
 		if (status & NV_PFIFO_INTR_DMA_PUSHER) {
-			NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n", chid);
+			if (nouveau_ratelimit())
+				NV_INFO(dev, "PFIFO_DMA_PUSHER - Ch %d\n",
+						chid);
 
 			status &= ~NV_PFIFO_INTR_DMA_PUSHER;
 			nv_wr32(dev, NV03_PFIFO_INTR_0,
@@ -227,8 +236,9 @@ nouveau_fifo_irq_handler(struct drm_device *dev)
 		}
 
 		if (status) {
-			NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
-				status, chid);
+			if (nouveau_ratelimit())
+				NV_INFO(dev, "PFIFO_INTR 0x%08x - Ch %d\n",
+					status, chid);
 			nv_wr32(dev, NV03_PFIFO_INTR_0, status);
 			status = 0;
 		}
@@ -505,13 +515,6 @@ nouveau_pgraph_intr_notify(struct drm_device *dev, uint32_t nsource)
 		nouveau_graph_dump_trap_info(dev, "PGRAPH_NOTIFY", &trap);
 }
 
-static DEFINE_RATELIMIT_STATE(nouveau_ratelimit_state, 3 * HZ, 20);
-
-static int nouveau_ratelimit(void)
-{
-	return __ratelimit(&nouveau_ratelimit_state);
-}
-
 
 static inline void
 nouveau_pgraph_intr_error(struct drm_device *dev, uint32_t nsource)
-- 
1.7.3.1


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/