From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
To: David Miller <davem@davemloft.net>
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: Thu, 2 Apr 2015 08:51:52 -0400 [thread overview]
Message-ID: <20150402125152.GA17528@oracle.com> (raw)
In-Reply-To: <20150331.231224.402909066860518278.davem@davemloft.net>
On (03/31/15 23:12), David Miller wrote:
>
> It's much more amortized with smart buffering strategies, which are
> common on current generation networking cards.
>
> There you only eat one map/unmap per "PAGE_SIZE / rx_pkt_size".
>
> Maybe the infiniband stuff is doing things very suboptimally, and
> actually with that subsystem and drivers absolutely nothing would
> surprise me.
yeh, we are trying to get more info from them about what their
bottle-necks are. Until then, lets just stick with the spin_lock.
do I need to resubmit this without the RFC tag? Perhaps I should
have dropped that some time ago.
--Sowmini
next prev parent reply other threads:[~2015-04-02 12:52 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
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 [this message]
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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