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From: kangning <kangning18z@ict.ac.cn>
To: linux-rdma@vger.kernel.org
Cc: kangning <kangning18z@ict.ac.cn>
Subject: [PATCH] Fix one error in mthca_alloc
Date: Thu, 26 Aug 2021 18:52:15 +0800	[thread overview]
Message-ID: <20210826105215.2001-1-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>
---
 drivers/infiniband/hw/mthca/mthca_allocator.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/infiniband/hw/mthca/mthca_allocator.c b/drivers/infiniband/hw/mthca/mthca_allocator.c
index aef1d274a14e..e81bb0fcd08e 100644
--- a/drivers/infiniband/hw/mthca/mthca_allocator.c
+++ b/drivers/infiniband/hw/mthca/mthca_allocator.c
@@ -51,6 +51,10 @@ 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:[~2021-08-26 10:59 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-26 10:52 kangning [this message]
2021-08-26 12:49 ` [PATCH] Fix one error in mthca_alloc Haakon Bugge

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