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Date: Sun, 10 Aug 2014 13:47:24 -0700 From: James Bottomley <James.Bottomley@...senPartnership.com> To: Theodore Ts'o <tytso@....edu> Cc: Li Xi <pkuelelixi@...il.com>, linux-fsdevel@...r.kernel.org, Ext4 Developers List <linux-ext4@...r.kernel.org>, viro@...iv.linux.org.uk, hch@...radead.org, Jan Kara <jack@...e.cz>, Andreas Dilger <adilger@...ger.ca>, "Niu, Yawei" <yawei.niu@...el.com> Subject: Re: [PATCH v2 0/4] quota: add project quota support On Sat, 2014-08-09 at 13:24 -0400, Theodore Ts'o wrote: > The last time I asked why in the world anyone would want to use this > feature, the only use case that I heard was people who were using > containers, and where the all of the project id's were inside a > chroot. Hence, any questions I asked about what happens when a file > gets moved out from the hierarchy were hand-waved away, since inside a > chroot, it could never happen. Actually, I don't believe that's entirely accurate. The performance problem with shared filesystem roots for containers has meant OpenVZ has been using a block root for a while. However, we still support the old shared filesystem root, but for quota's within the chroot, we use a subtree quota system (not a project quota) for which Dmitry Monakhov posted the patches several times a couple of years ago. James -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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