From: David Miller <davem@davemloft.net>
To: sowmini.varadhan@oracle.com
Cc: aik@au1.ibm.com, anton@au1.ibm.com, paulus@samba.org,
sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v8 RFC 0/3] Generic IOMMU pooled allocator
Date: Tue, 31 Mar 2015 14:08:48 -0400 (EDT) [thread overview]
Message-ID: <20150331.140848.1629977835564626654.davem@davemloft.net> (raw)
In-Reply-To: <20150331180642.GA13314@oracle.com>
From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Date: Tue, 31 Mar 2015 14:06:42 -0400
> Having bravely said that..
>
> the IB team informs me that they see a 10% degradation using
> the spin_lock as opposed to the trylock.
>
> one path going forward is to continue processing this patch-set
> as is. I can investigate this further, and later revise the spin_lock
> to the trylock, after we are certain that it is good/necessary.
>
> thoughts?
Let's address the trylock vs. spin_lock thing later and use plain
spin_lock for now.
next prev parent reply other threads:[~2015-03-31 18:08 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-31 14:40 [PATCH v8 RFC 0/3] Generic IOMMU pooled allocator Sowmini Varadhan
2015-03-31 14:40 ` [PATCH v8 RFC 1/3] sparc: Break up monolithic iommu table/lock into finer graularity pools and lock Sowmini Varadhan
2015-03-31 15:15 ` David Laight
2015-03-31 15:25 ` Sowmini Varadhan
2015-04-02 20:54 ` Benjamin Herrenschmidt
2015-04-02 21:43 ` Sowmini Varadhan
2015-04-02 21:57 ` Benjamin Herrenschmidt
2015-04-02 22:01 ` Benjamin Herrenschmidt
2015-04-02 22:02 ` Benjamin Herrenschmidt
2015-04-02 22:15 ` Sowmini Varadhan
2015-04-02 22:19 ` Benjamin Herrenschmidt
2015-04-02 21:54 ` Sowmini Varadhan
2015-04-02 22:08 ` Benjamin Herrenschmidt
2015-04-03 0:42 ` David Miller
2015-04-03 18:28 ` Sowmini Varadhan
2015-04-03 21:06 ` Benjamin Herrenschmidt
2015-04-03 21:51 ` Sowmini Varadhan
2015-04-04 11:27 ` Sowmini Varadhan
2015-04-04 13:33 ` Benjamin Herrenschmidt
2015-03-31 14:40 ` [PATCH v8 RFC 2/3] sparc: Make sparc64 use scalable lib/iommu-common.c functions Sowmini Varadhan
2015-03-31 14:40 ` [PATCH v8 RFC 3/3] sparc: Make LDC use common iommu poll management functions Sowmini Varadhan
2015-03-31 18:06 ` [PATCH v8 RFC 0/3] Generic IOMMU pooled allocator Sowmini Varadhan
2015-03-31 18:08 ` David Miller [this message]
2015-04-01 1:01 ` Benjamin Herrenschmidt
2015-04-01 1:08 ` Sowmini Varadhan
2015-04-01 3:12 ` David Miller
2015-04-02 12:51 ` Sowmini Varadhan
2015-04-02 16:21 ` David Miller
2015-04-02 20:22 ` Benjamin Herrenschmidt
2015-04-02 20:52 ` Benjamin Herrenschmidt
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