From: David Miller <davem@davemloft.net>
To: sowmini.varadhan@oracle.com
Cc: aik@au1.ibm.com, aik@ozlabs.ru, anton@au1.ibm.com,
paulus@samba.org, sparclinux@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: Generic IOMMU pooled allocator
Date: Mon, 23 Mar 2015 19:05:08 +0000 [thread overview]
Message-ID: <20150323.150508.149509757161802782.davem@davemloft.net> (raw)
In-Reply-To: <20150323165406.GG14061@oracle.com>
From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Date: Mon, 23 Mar 2015 12:54:06 -0400
> If it was only an optimization (i.e., removing it would not break
> any functionality), and if this was done for older hardware,
> and *if* we believe that the direction of most architectures is to
> follow the sun4v/HV model, then, given that the sun4u code only uses 1
> arena pool anyway, one thought that I have for refactoring this
> is the following:
Why add performance regressions to old machines who already are
suffering too much from all the bloat we are constantly adding to the
kernel?
WARNING: multiple messages have this Message-ID (diff)
From: David Miller <davem@davemloft.net>
To: sowmini.varadhan@oracle.com
Cc: aik@au1.ibm.com, aik@ozlabs.ru, anton@au1.ibm.com,
paulus@samba.org, sparclinux@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org
Subject: Re: Generic IOMMU pooled allocator
Date: Mon, 23 Mar 2015 15:05:08 -0400 (EDT) [thread overview]
Message-ID: <20150323.150508.149509757161802782.davem@davemloft.net> (raw)
In-Reply-To: <20150323165406.GG14061@oracle.com>
From: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Date: Mon, 23 Mar 2015 12:54:06 -0400
> If it was only an optimization (i.e., removing it would not break
> any functionality), and if this was done for older hardware,
> and *if* we believe that the direction of most architectures is to
> follow the sun4v/HV model, then, given that the sun4u code only uses 1
> arena pool anyway, one thought that I have for refactoring this
> is the following:
Why add performance regressions to old machines who already are
suffering too much from all the bloat we are constantly adding to the
kernel?
next prev parent reply other threads:[~2015-03-23 19:05 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-19 2:25 Generic IOMMU pooled allocator David Miller
2015-03-19 2:25 ` David Miller
2015-03-19 2:46 ` Benjamin Herrenschmidt
2015-03-19 2:46 ` Benjamin Herrenschmidt
2015-03-19 2:50 ` David Miller
2015-03-19 2:50 ` David Miller
2015-03-19 3:01 ` Benjamin Herrenschmidt
2015-03-19 3:01 ` Benjamin Herrenschmidt
2015-03-19 5:27 ` Alexey Kardashevskiy
2015-03-19 5:27 ` Alexey Kardashevskiy
2015-03-19 13:34 ` Sowmini Varadhan
2015-03-19 13:34 ` Sowmini Varadhan
2015-03-22 19:27 ` Sowmini Varadhan
2015-03-22 19:27 ` Sowmini Varadhan
2015-03-23 16:29 ` David Miller
2015-03-23 16:29 ` David Miller
2015-03-23 16:54 ` Sowmini Varadhan
2015-03-23 16:54 ` Sowmini Varadhan
2015-03-23 19:05 ` David Miller [this message]
2015-03-23 19:05 ` David Miller
2015-03-23 19:09 ` Sowmini Varadhan
2015-03-23 19:09 ` Sowmini Varadhan
2015-03-23 22:21 ` Benjamin Herrenschmidt
2015-03-23 22:21 ` Benjamin Herrenschmidt
2015-03-23 23:08 ` Sowmini Varadhan
2015-03-23 23:08 ` Sowmini Varadhan
2015-03-23 23:29 ` chase rayfield
2015-03-24 0:47 ` Benjamin Herrenschmidt
2015-03-24 0:47 ` Benjamin Herrenschmidt
2015-03-24 1:11 ` Sowmini Varadhan
2015-03-24 1:11 ` Sowmini Varadhan
2015-03-24 1:44 ` David Miller
2015-03-24 1:44 ` David Miller
2015-03-24 1:57 ` Sowmini Varadhan
2015-03-24 1:57 ` Sowmini Varadhan
2015-03-24 2:08 ` Benjamin Herrenschmidt
2015-03-24 2:08 ` Benjamin Herrenschmidt
2015-03-24 2:15 ` David Miller
2015-03-24 2:15 ` David Miller
2015-03-26 0:43 ` cascardo
2015-03-26 0:43 ` cascardo
2015-03-26 0:49 ` Benjamin Herrenschmidt
2015-03-26 0:49 ` Benjamin Herrenschmidt
2015-03-26 10:56 ` Sowmini Varadhan
2015-03-26 10:56 ` Sowmini Varadhan
2015-03-26 22:51 ` David Miller
2015-03-26 23:00 ` David Miller
2015-03-26 23:51 ` Benjamin Herrenschmidt
2015-03-26 23:51 ` Benjamin Herrenschmidt
2015-03-23 22:36 ` Benjamin Herrenschmidt
2015-03-23 22:36 ` Benjamin Herrenschmidt
2015-03-23 23:19 ` Sowmini Varadhan
2015-03-23 23:19 ` Sowmini Varadhan
2015-03-24 0:48 ` Benjamin Herrenschmidt
2015-03-24 0:48 ` Benjamin Herrenschmidt
2015-03-23 22:25 ` Benjamin Herrenschmidt
2015-03-23 22:25 ` Benjamin Herrenschmidt
2015-03-22 19:36 ` Arnd Bergmann
2015-03-22 19:36 ` Arnd Bergmann
2015-03-22 22:02 ` Benjamin Herrenschmidt
2015-03-22 22:02 ` Benjamin Herrenschmidt
2015-03-22 22:07 ` Sowmini Varadhan
2015-03-22 22:07 ` Sowmini Varadhan
2015-03-22 22:22 ` Benjamin Herrenschmidt
2015-03-22 22:22 ` Benjamin Herrenschmidt
2015-03-23 6:04 ` Arnd Bergmann
2015-03-23 6:04 ` Arnd Bergmann
2015-03-23 11:04 ` Benjamin Herrenschmidt
2015-03-23 11:04 ` Benjamin Herrenschmidt
2015-03-23 18:45 ` Arnd Bergmann
2015-03-23 18:45 ` Arnd Bergmann
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