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From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: pages already locked on ia64
Date: Mon, 17 Nov 2003 23:40:25 +0000	[thread overview]
Message-ID: <marc-linux-ia64-106911257232380@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-106881037208683@msgid-missing>

>>>>> On Fri, 14 Nov 2003 11:22:23 +0100, Christian Hinkelbein <hinkelbein@ti.uni-mannheim.de> said:

  Christian> Hi, i have the need to lock malloc'ed user mem between
  Christian> kernel calls.

  Christian> On ia32 i succesfully do a lock_page() on every page
  Christian> returned by get_user_pages(), lateron i do unlock_page().
  Christian> On ia64 sometimes (on ia32 seemingly never) the first
  Christian> page is already locked, just after malloc().  For a quick
  Christian> hack i check all pages before trying to lock them, so
  Christian> that i am later just unlocking the not previously locked
  Christian> ones.

Umh, what page-size did you use?

In any case, a minimal test-program that reproduces the problem would
probably help you get an answer much faster.

Thanks,

	--david

  reply	other threads:[~2003-11-17 23:40 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-11-14 10:22 pages already locked on ia64 Christian Hinkelbein
2003-11-17 23:40 ` David Mosberger [this message]
2003-11-21 15:17 ` Christian Hinkelbein
2003-11-24  4:58 ` Andrew Morton

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