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From: kangning <kangning18z@ict.ac.cn>
To: haakon.bugge@oracle.com
Cc: linux-rdma@vger.kernel.org, kangning <kangning18z@ict.ac.cn>
Subject: [PATCH v3] Fix one error in mthca_alloc
Date: Fri, 27 Aug 2021 08:52:28 +0800	[thread overview]
Message-ID: <20210827005228.15671-1-kangning18z@ict.ac.cn> (raw)

drivers/infiniband/hw/mthca/mthca_allocator.c: alloc->last left unchanged in mthca_alloc, which
has impact on performance of function find_next_zero_bit in mthca_alloc.

Signed-off-by: kangning <kangning18z@ict.ac.cn>
---
 
 I squashed two commits into one in this version.
 
 drivers/infiniband/hw/mthca/mthca_allocator.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c
index aef1d274a14e..1141695093e7 100644
--- a/drivers/infiniband/hw/mthca/mthca_allocator.c
+++ b/drivers/infiniband/hw/mthca/mthca_allocator.c
@@ -51,6 +51,9 @@ u32 mthca_alloc(struct mthca_alloc *alloc)
 	}
 
 	if (obj < alloc->max) {
+		alloc->last = obj + 1;
+		if (alloc->last == alloc->max)
+			alloc->last = 0;
 		set_bit(obj, alloc->table);
 		obj |= alloc->top;
 	} else
-- 
2.17.1


             reply	other threads:[~2021-08-27  0:52 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27  0:52 kangning [this message]
2021-08-31  9:52 ` [PATCH v3] Fix one error in mthca_alloc Leon Romanovsky
2021-08-31 10:40   ` 康宁
2021-08-31 12:00     ` Leon Romanovsky
2021-08-31 12:16       ` kangning18z
2021-08-31 10:47   ` 康宁
     [not found]   ` <202109011027459851120@ict.ac.cn>
2021-09-01  7:51     ` Leon Romanovsky

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