| To: | Christoph Hellwig <hch@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: BUG: soft lockup - is this XFS problem? |
| From: | Nick Piggin <npiggin@xxxxxxx> |
| Date: | Tue, 30 Dec 2008 05:23:33 +0100 |
| Cc: | Roman Kononov <kernel@xxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx |
| In-reply-to: | <20081223171259.GA11945@xxxxxxxxxxxxx> |
| References: | <gifgp1$8ic$1@xxxxxxxxxxxxx> <20081223171259.GA11945@xxxxxxxxxxxxx> |
| User-agent: | Mutt/1.5.9i |
On Tue, Dec 23, 2008 at 12:12:59PM -0500, Christoph Hellwig wrote: > > Nick, I've seen various reports like this by Roman. It seems to be > caused by an interaction of the lockless pagecache with the xfs > I/O code. Any idea what might be wrong here: Hmm, it could get into a loop here if there is a page in the pagecache with a zero refcount, which might be a problem with XFS... other looping conditions might indicate a problem iwth lockless pagecache or radix tree. It would be very helpful to know what condition it is looping on... |
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