On Tue, 10 Mar 2015, Beata Michalska wrote: > Date: Tue, 10 Mar 2015 16:25:12 +0100 > From: Beata Michalska <b.k.m.devel@xxxxxxxxx> > To: Jan Kara <jack@xxxxxxx> > Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, > Kyungmin Park <kmpark@xxxxxxxxxxxxx>, > Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>, > Hugh Dickins <hughd@xxxxxxxxxx>, linux-mm <linux-mm@xxxxxxxxx>, > Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, > Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>, > Linux Filesystem Mailing List <linux-fsdevel@xxxxxxxxxxxxxxx>, > Bartlomiej Zolnierkiewicz <b.zolnierkie@xxxxxxxxxxx>, > Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > Subject: Re: [RFC] shmem: Add eventfd notification on utlilization level > > On 03/10/2015 03:22 PM, Jan Kara wrote: > > On Tue 10-03-15 06:03:23, Christoph Hellwig wrote: > >> On Tue, Mar 10, 2015 at 10:51:41AM +0900, Kyungmin Park wrote: > >>> Any updates? > >> Please just add disk quota support to tmpfs so thast the standard quota > >> netlink notifications can be used. > > If I understand the problem at hand, they are really interested in > > notification when running out of free space. Using quota for that doesn't > > seem ideal since that tracks used space per user, not free space on fs as a > > whole. > > > > But if I remember right there were discussions about ENOSPC notification > > from filesystem for thin provisioning usecases. It would be good to make > > this consistent with those but I'm not sure if it went anywhere. > > > > Honza > > The ideal case here, would be to get the notification, despite the type > of the actual filesystem, whenever the amount of free space drops below > a certain level. Quota doesn't seem to be the right approach here. > > BR > Beata Michalska A while back I was prototyping a netlink notification interface for file systems, but it went nowhere. https://lkml.org/lkml/2011/8/18/170 So maybe it's time get back to the drawing board and finish the idea, since it seems to be some interest in this now. -Lukas > > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>