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Message-ID: <001e01c17467$d1deaf10$f5976dcf@nwfs>
From: "Jeff Merkey" <jmerkey@timpanogas.org>
To: "Alexander Viro" <viro@math.psu.edu>, <linux-kernel@vger.kernel.org>
Cc: "Linus Torvalds" <torvalds@transmeta.com>,
        "Marcelo Tosatti" <marcelo@conectiva.com.br>
In-Reply-To: <Pine.GSO.4.21.0111231606150.2422-100000@weyl.math.psu.edu>
Subject: Re: 2.4.15-pre9 breakage (inode.c)
Date: Fri, 23 Nov 2001 14:42:59 -0700
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Al,

I have seen this as well during testing, except in my case, it results in a
hard hang of sorts that does not respond to signals.  I can make it show up
easily by doing a copy accross mount points in low memory conditions, if any
of this helps.  Sounds like you've got a good handle on it, though.

Jeff

----- Original Message -----
From: "Alexander Viro" <viro@math.psu.edu>
To: <linux-kernel@vger.kernel.org>
Cc: "Linus Torvalds" <torvalds@transmeta.com>; "Marcelo Tosatti"
<marcelo@conectiva.com.br>
Sent: Friday, November 23, 2001 2:22 PM
Subject: 2.4.15-pre9 breakage (inode.c)


> Sigh...  Supposed fix to problems with stale inodes was completely
> broken.
>
> What we need is "if we are doing last iput() on fs that is getting
> shut, sync it and don't leave it in cache".  And yes, we have a similar
> path in iput().  Similar, but not quite the same.
>
> Fix is
> * new fs flag: "MS_ACTIVE".
> * set after normal ->read_super().
> * reset after we are done with fsync_super() in kill_super().
> * iput() checking that and if it's set - doing write_inode_now() and
kicking
> it out of hash.
>
> I'll send patch in ~10 minutes.
>
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