From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Hugh Dickins <hugh@veritas.com>
Cc: "Eugene V. Lyubimkin" <jackyf.devel@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Chris Friesen <cfriesen@nortel.com>,
Rik van Riel <riel@redhat.com>,
linux-kernel@vger.kernel.org, linux-mm <linux-mm@kvack.org>
Subject: Re: mmap: is default non-populating behavior stable?
Date: Wed, 5 Nov 2008 16:54:05 +0000 [thread overview]
Message-ID: <20081105165405.777ab502@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <Pine.LNX.4.64.0811051613400.21353@blonde.site>
> (Every year or so we do wonder whether to change an extending mremap
> of a MAP_SHARED|MAP_ANONYMOUS object to extend the object itself instead
> of just SIGBUSing on the extension: but I've so far remained conservative
> about that, and Eugene appears to be thinking of more ordinary files.)
Try an mremap of a VM_GROWS* mapping and all the other things of this
nature. I would say our current behaviour is not what might be expected
by users. The extending an object case is just one example of weird
behaviour.
Alan
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next prev parent reply other threads:[~2008-11-05 16:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <490F73CD.4010705@gmail.com>
2008-11-03 22:41 ` Peter Zijlstra
2008-11-03 22:49 ` Rik van Riel
2008-11-04 15:56 ` Chris Friesen
2008-11-04 16:07 ` Peter Zijlstra
2008-11-04 16:28 ` Alan Cox
2008-11-04 16:51 ` Eugene V. Lyubimkin
2008-11-05 16:42 ` Hugh Dickins
2008-11-05 16:54 ` Alan Cox [this message]
2008-11-05 17:50 ` Eugene V. Lyubimkin
2008-11-05 23:31 ` Hugh Dickins
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