From: Jes Sorensen <jes@sgi.com>
To: linux-ia64@vger.kernel.org
Subject: Re: [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled
Date: Mon, 03 Sep 2007 09:21:41 +0000 [thread overview]
Message-ID: <yq03axwf6je.fsf@jaguar.mkp.net> (raw)
In-Reply-To: <200708301338.34246.protasnb@gmail.com>
>>>>> "Natalie" = Natalie Protasevich <protasnb@gmail.com> writes:
Natalie> From: Natalie Protasevich <protasnb@gmail.com>
Natalie> This patch allows to disable ptc.g. The code used to be in
Natalie> the kernel, then was removed in 2.4 since the bug that it was
Natalie> fixing has gone away. However, some large system vendors now
Natalie> want this capability available through a means that can be
Natalie> controlled by the platform in the event that there is an
Natalie> issue with either processor or their chipset where global
Natalie> ptc.g is not operational. They want the mechanism for future
Natalie> platforms to work around such issues. It is also needed for
Natalie> platform makers when they deliberately do not use the global
Natalie> cache purge in their chipset implementation. (For such cases,
Natalie> Intel provided a SAL table entry to specify if ptc.g is
Natalie> allowed and how many).
If you need a special TLB purge implementation, please use the machine
vector as we do on the sn2 architecture - there is no reason to
implement a boot time option for this.
Who are these large system vendors who want this patch in? I presume
it's not the people running gmail? :-)
Cheers,
Jes
next prev parent reply other threads:[~2007-09-03 9:21 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-30 20:38 [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Natalie Protasevich
2007-08-31 1:15 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be Zou Nan hai
2007-08-31 1:45 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to bedisabled Luck, Tony
2007-08-31 1:48 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to Zou Nan hai
2007-09-03 8:06 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to bedisabled Natalie Protasevich
2007-09-03 8:06 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled - take 2 Natalie Protasevich
2007-09-03 9:21 ` Jes Sorensen [this message]
2007-09-03 9:37 ` Jes Sorensen
2007-09-04 8:46 ` Robin Holt
2007-09-04 9:03 ` Luck, Tony
2007-09-04 14:58 ` Natalie Protasevich
2007-09-04 16:05 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Natalie Protasevich
2007-09-04 19:59 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled - take 2 Bjorn Helgaas
2007-09-04 21:20 ` Natalie Protasevich
2007-09-05 13:35 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be Jes Sorensen
2007-09-05 13:57 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Robin Holt
2007-09-05 15:29 ` Natalie Protasevich
2007-09-05 15:47 ` David Mosberger-Tang
2007-09-05 16:01 ` Natalie Protasevich
2007-09-06 16:36 ` David Mosberger-Tang
2007-09-06 18:00 ` Natalie Protasevich
2007-09-07 7:38 ` Luck, Tony
2007-09-07 8:38 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be Jes Sorensen
2007-09-07 16:11 ` [PATCH 1/1] Allow global purge traslation cache (ptc.g) to be disabled Bjorn Helgaas
2007-09-07 16:25 ` Natalie Protasevich
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