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Date: Sat, 02 Feb 2008 16:26:11 +0100 From: Laurent Vivier <Laurent.Vivier@...l.net> To: Pavel Machek <pavel@....cz> Cc: Paul.Clements@...eleye.com, nbd-general@...ts.sourceforge.net, linux-kernel@...r.kernel.org Subject: Re: [PATCH] Allow NBD to be used locally Le samedi 02 février 2008 à 12:23 +0100, Pavel Machek a écrit : > On Fri 2008-02-01 14:25:32, Laurent Vivier wrote: > > This patch allows Network Block Device to be mounted locally. > > What is local nbd good for? Use loop instead... It allows to write userlevel block device. In my case, I can mount disk image of Qemu (qcow2, vmdk, ...). > > It creates a kthread to avoid the deadlock described in NBD tools documentation. > > So, if nbd-client hangs waiting pages, the kblockd thread can continue its > > work and free pages. > > Hmm, and if there are no other pages that can be freed? Unlikely, but > can happen AFAICT. Correct. The patch improves the NBD behavior even if it is not perfect. And I think if no other page can be freed your system is in very bad move ;-) Laurent -- ----------------- Laurent.Vivier@...l.net ------------------ "La perfection est atteinte non quand il ne reste rien à ajouter mais quand il ne reste rien à enlever." Saint Exupéry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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