From: Robert Love <rml@tech9.net>
To: "Martin J. Bligh" <mbligh@aracnet.com>
Cc: "Perez-Gonzalez, Inaky" <inaky.perez-gonzalez@intel.com>,
"'linux-mm@kvack.org'" <linux-mm@kvack.org>
Subject: RE: Silly question: How to map a user space page in kernel space?
Date: 25 Feb 2003 23:39:08 -0500 [thread overview]
Message-ID: <1046234347.1346.132.camel@phantasy> (raw)
In-Reply-To: <7550000.1046232898@[10.10.2.4]>
On Tue, 2003-02-25 at 23:14, Martin J. Bligh wrote:
> Each type is for a different usage, and you need to ensure that two things
> can't reuse the same type at once. As long as interrupts, or whatever could
> disturb you can't use what you use, you're OK. Note that you can't hold
> kmap_atomic over a schedule (presumably this means no pre-emption either).
Indeed, kmap_atomic() disables kernel preemption :)
Which found at least one instance of actually calling schedule() over
kmap_atomic(), due to the atomicity debugging.
Robert Love
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next prev parent reply other threads:[~2003-02-26 4:39 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <A46BBDB345A7D5118EC90002A5072C780A7D57BB@orsmsx116.jf.intel.com >
2003-02-26 3:06 ` Silly question: How to map a user space page in kernel space? Perez-Gonzalez, Inaky
2003-02-26 4:14 ` Martin J. Bligh
2003-02-26 4:39 ` Robert Love [this message]
2003-02-26 19:04 Perez-Gonzalez, Inaky
-- strict thread matches above, loose matches on Subject: below --
2003-02-26 18:57 Perez-Gonzalez, Inaky
2003-02-26 19:01 ` Mel Gorman
[not found] <A46BBDB345A7D5118EC90002A5072C780A7D57E6@orsmsx116.jf.intel.com >
2003-02-26 4:44 ` Perez-Gonzalez, Inaky
2003-02-26 5:55 ` Martin J. Bligh
2003-02-26 8:33 ` Andrew Morton
2003-02-26 19:03 ` Martin J. Bligh
2003-02-26 12:40 ` Mel Gorman
2003-02-21 22:49 Perez-Gonzalez, Inaky
[not found] <A46BBDB345A7D5118EC90002A5072C780A7D5194@orsmsx116.jf.intel.com >
2003-02-21 22:06 ` Perez-Gonzalez, Inaky
2003-02-21 22:22 ` Martin J. Bligh
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