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   <TITLE> [Mageia-dev] Lazy NFS umount problem: kernel or userspace?
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   <H1>[Mageia-dev] Lazy NFS umount problem: kernel or userspace?</H1>
    <B>Pascal Terjan</B> 
    <A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Lazy%20NFS%20umount%20problem%3A%20kernel%20or%20userspace%3F&In-Reply-To=%3CCA%2BCX%2Bbg_Ae8O_6L_vs%3DbD47Q%3DX%3DfJ8wA-Udw9sTqXHvfGUbhrQ%40mail.gmail.com%3E"
       TITLE="[Mageia-dev] Lazy NFS umount problem: kernel or userspace?">pterjan at gmail.com
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    <I>Mon Nov 19 14:55:50 CET 2012</I>
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<PRE>On Mon, Nov 19, 2012 at 9:39 AM, Colin Guthrie &lt;<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">mageia at colin.guthr.ie</A>&gt;wrote:

&gt;<i> Hi,
</I>&gt;<i>
</I>&gt;<i> For many, many years, I've always done a umount -l  on stale NFS mounts
</I>&gt;<i> (e.g. when resuming in a different location to suspending).
</I>&gt;<i>
</I>&gt;<i> This has always worked, but very recently (i.e. in the last couple
</I>&gt;<i> weeks) this has stopped working.
</I>&gt;<i>
</I>&gt;<i> Anyone know what could be up?
</I>&gt;<i>
</I>&gt;<i> Blino's change to nfs-utils doesn't look like a problem.
</I>&gt;<i>
</I>&gt;<i> The call that's stalling things is stat(), but this never used to be a
</I>&gt;<i> problem with lazy umounts in the past (not sure if it's just stat()
</I>&gt;<i> that's now blocking at a kernel level or of some userspace code now
</I>&gt;<i> calls it when in the past it did not?
</I>&gt;<i>
</I>
If your nfs mount is dead I would expect stat to hang, so I guess it wasn't
called in the past.
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