From: Christoph Hellwig <hch@infradead.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Jan Kara <jack@suse.cz>,
Richard Weinberger <richard.weinberger@gmail.com>,
Christoph Hellwig <hch@infradead.org>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
Dongsheng Yang <yangds.fnst@cn.fujitsu.com>,
Richard Weinberger <richard@nod.at>,
linux-mtd@lists.infradead.org, kernel@pengutronix.de
Subject: Re: UBIFS quota support
Date: Mon, 28 Jan 2019 00:09:38 -0800 [thread overview]
Message-ID: <20190128080938.GA1076@infradead.org> (raw)
In-Reply-To: <20190125092156.ck77sdqainmmewuz@pengutronix.de>
FYI, the main reason (well, besides history) that XFS uses its own
quota code is so that it can have full integration with the transaction
subsystem and the on-disk data structures.
While it is going to be a lot more code you might want to look into
implementing quota accounting in ubifs itself and only use the
standard interfaces to report and adminstrate the quota values.
That way you might not even have to maintain a separate quota file and
could instead maintain usage statistics in the btree nodes, and only
summarize them in memory, possibly with a periodical full state dump.
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@infradead.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>,
Jan Kara <jack@suse.cz>,
Richard Weinberger <richard.weinberger@gmail.com>,
Richard Weinberger <richard@nod.at>,
Christoph Hellwig <hch@infradead.org>,
linux-mtd@lists.infradead.org, kernel@pengutronix.de,
linux-fsdevel <linux-fsdevel@vger.kernel.org>
Subject: Re: UBIFS quota support
Date: Mon, 28 Jan 2019 00:09:38 -0800 [thread overview]
Message-ID: <20190128080938.GA1076@infradead.org> (raw)
In-Reply-To: <20190125092156.ck77sdqainmmewuz@pengutronix.de>
FYI, the main reason (well, besides history) that XFS uses its own
quota code is so that it can have full integration with the transaction
subsystem and the on-disk data structures.
While it is going to be a lot more code you might want to look into
implementing quota accounting in ubifs itself and only use the
standard interfaces to report and adminstrate the quota values.
That way you might not even have to maintain a separate quota file and
could instead maintain usage statistics in the btree nodes, and only
summarize them in memory, possibly with a periodical full state dump.
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http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2019-01-28 8:09 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-10 11:44 UBIFS quota support Sascha Hauer
2019-01-10 11:44 ` Sascha Hauer
2019-01-22 23:07 ` Richard Weinberger
2019-01-22 23:07 ` Richard Weinberger
2019-01-23 9:43 ` Sascha Hauer
2019-01-23 9:43 ` Sascha Hauer
2019-01-23 9:46 ` Richard Weinberger
2019-01-23 9:46 ` Richard Weinberger
2019-01-23 9:55 ` Sascha Hauer
2019-01-23 9:55 ` Sascha Hauer
2019-01-23 10:47 ` Richard Weinberger
2019-01-23 10:47 ` Richard Weinberger
2019-01-23 15:47 ` Jan Kara
2019-01-23 15:47 ` Jan Kara
2019-01-25 9:21 ` Sascha Hauer
2019-01-25 9:21 ` Sascha Hauer
2019-01-28 8:09 ` Christoph Hellwig [this message]
2019-01-28 8:09 ` Christoph Hellwig
2019-01-30 12:45 ` Jan Kara
2019-01-30 12:45 ` Jan Kara
2019-01-31 7:37 ` Sascha Hauer
2019-01-31 7:37 ` Sascha Hauer
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