From: Linus Torvalds <torvalds@transmeta.com>
To: Kanoj Sarcar <kanoj@google.engr.sgi.com>
Cc: Linux-MM@kvack.org
Subject: Re: [PATCH] kanoj-mm2.0-2.2.9 unneccesary page force in by munlock
Date: Mon, 17 May 1999 09:11:19 -0700 (PDT) [thread overview]
Message-ID: <Pine.LNX.3.95.990517091025.10344C-100000@penguin.transmeta.com> (raw)
In-Reply-To: <199905170616.XAA97025@google.engr.sgi.com>
On Sun, 16 May 1999, Kanoj Sarcar wrote:
>
> Hmm, my logic was a little bit different. Note that you can call munlock()
> on a range even when a previous mlock() has not been done on the range (I
> think that's not an munlock error in POSIX). In 2.2.9, this would end up
> faulting in the pages, which doesn't need to happen ... (haven't really
> thought whether "root" can erroneously force memory deadlocks this way)
Well, if you look closely, the mlock_fixup() routine tests whether
lockedness has changed and returns early if it hasn't.. So in your case
nothing at all would have been done..
Linus
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next prev parent reply other threads:[~1999-05-17 16:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-05-17 4:02 Kanoj Sarcar
1999-05-17 4:48 ` Linus Torvalds
1999-05-17 6:16 ` Kanoj Sarcar
1999-05-17 16:11 ` Linus Torvalds [this message]
1999-05-17 17:31 ` Kanoj Sarcar
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