From: Nicholas Mc Guire <hofrat@osadl.org>
To: Jon Mason <jdmason@kudzu.us>
Cc: Dave Jiang <dave.jiang@intel.com>,
Allen Hubbe <Allen.Hubbe@emc.com>,
Logan Gunthorpe <logang@deltatee.com>,
Arnd Bergmann <arnd@arndb.de>,
Sudip Mukherjee <sudipm.mukherjee@gmail.com>,
linux-ntb@googlegroups.com, linux-kernel@vger.kernel.org,
Nicholas Mc Guire <hofrat@osadl.org>
Subject: [PATCH 2/2] ntb: make DMA_OUT_RESOURCE_TO HZ independent
Date: Mon, 22 Aug 2016 18:51:36 +0200 [thread overview]
Message-ID: <1471884696-25558-2-git-send-email-hofrat@osadl.org> (raw)
In-Reply-To: <1471884696-25558-1-git-send-email-hofrat@osadl.org>
schedule_timeout_* takes a timeout in jiffies but the code currently is
passing in a constant which makes this timeout HZ dependent, so pass it
through msecs_to_jiffies() to fix this up.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
---
Problem found by coccinelle script
The below patch sets the timeout to 50ms - not clear what HZ setting was
assumed during design/testing, so this needs an ack by someone who knows
the driver and can confirm that 50ms is reasonable to wait on DMA retries.
Patch was compile tested with: x86_64_defconfig + CONFIG_NTB=m,
CONFIG_NTB_PERF=m
Patch is against 4.8.0-rc2 (localversion-next is -next-20160822)
drivers/ntb/test/ntb_perf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index 6a50f20..e065b69 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -72,7 +72,7 @@
#define MAX_THREADS 32
#define MAX_TEST_SIZE SZ_1M
#define MAX_SRCS 32
-#define DMA_OUT_RESOURCE_TO 50
+#define DMA_OUT_RESOURCE_TO msecs_to_jiffies(50)
#define DMA_RETRIES 20
#define SZ_4G (1ULL << 32)
#define MAX_SEG_ORDER 20 /* no larger than 1M for kmalloc buffer */
--
2.1.4
next prev parent reply other threads:[~2016-08-22 16:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-22 16:51 [PATCH 1/2] ntb_transport: " Nicholas Mc Guire
2016-08-22 16:51 ` Nicholas Mc Guire [this message]
2016-08-22 16:58 ` [PATCH 2/2] ntb: " Jiang, Dave
2016-08-23 16:43 ` Jon Mason
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