From: Dave Chinner <david@fromorbit.com>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Matthew Wilcox <willy@infradead.org>,
Miklos Szeredi <mszeredi@redhat.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
Al Viro <viro@zeniv.linux.org.uk>,
Andreas Dilger <adilger@dilger.ca>,
Andreas Gruenbacher <agruenba@redhat.com>,
Christoph Hellwig <hch@lst.de>,
"Darrick J . Wong" <djwong@kernel.org>,
Dave Kleikamp <shaggy@kernel.org>,
David Sterba <dsterba@suse.com>, Jaegeuk Kim <jaegeuk@kernel.org>,
Jan Kara <jack@suse.cz>, Joel Becker <jlbec@evilplan.org>,
Matthew Garrett <matthew.garrett@nebula.com>,
Mike Marshall <hubcap@omnibond.com>,
Richard Weinberger <richard@nod.at>,
Ryusuke Konishi <konishi.ryusuke@gmail.com>,
Theodore Ts'o <tytso@mit.edu>, Tyler Hicks <code@tyhicks.com>
Subject: Re: [PATCH 00/18] new API for FS_IOC_[GS]ETFLAGS/FS_IOC_FS[GS]ETXATTR
Date: Mon, 8 Feb 2021 13:00:02 +1100 [thread overview]
Message-ID: <20210208020002.GM4626@dread.disaster.area> (raw)
In-Reply-To: <CAJfpegvV19DT+nQcW5OiLsGWjnp9-DoLAY16S60PewSLcKLTMA@mail.gmail.com>
On Wed, Feb 03, 2021 at 04:03:06PM +0100, Miklos Szeredi wrote:
> On Wed, Feb 3, 2021 at 3:56 PM Matthew Wilcox <willy@infradead.org> wrote:
>
> > But let's talk specifics. What does CIFS need to contact the server for?
> > Could it be cached earlier?
>
> I don't understand what CIFS is doing, and I don't really care. This
> is the sort of operation where adding a couple of network roundtrips
> so that the client can obtain the credentials required to perform the
> operation doesn't really matter. We won't have thousands of chattr(1)
> calls per second.
Incorrect.
The xfs utilities can do recursive directory traversal to change
things like the project ID across an entire directory tree. Or to
change extent size hints.
We also have 'xfs_io -c "lsattr -R" ...' and 'lsprog -R' which will
do a recursive descent to list the requested attributes of all
directories and files in the tree...
So, yeah, we do indeed do thousands of these fsxattr based
operations a second, sometimes tens of thousands a second or more,
and sometimes they are issued in bulk in performance critical paths
for container build/deployment operations....
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2021-02-08 2:01 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 12:40 [PATCH 00/18] new API for FS_IOC_[GS]ETFLAGS/FS_IOC_FS[GS]ETXATTR Miklos Szeredi
2021-02-03 12:40 ` [PATCH 01/18] vfs: add miscattr ops Miklos Szeredi
2021-02-03 15:04 ` Jan Kara
2021-02-03 15:21 ` Miklos Szeredi
2021-03-23 0:23 ` Eric Biggers
2021-03-25 14:52 ` Miklos Szeredi
2021-03-25 15:17 ` Al Viro
2021-02-03 12:40 ` [PATCH 02/18] ecryptfs: stack " Miklos Szeredi
2021-02-03 12:40 ` [PATCH 03/18] ovl: stack miscattr Miklos Szeredi
2021-02-04 23:42 ` Vivek Goyal
2021-02-05 15:25 ` Miklos Szeredi
2021-02-05 15:28 ` Miklos Szeredi
2021-02-03 12:40 ` [PATCH 04/18] btrfs: convert to miscattr Miklos Szeredi
2021-02-03 12:40 ` [PATCH 05/18] ext2: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 06/18] ext4: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 07/18] f2fs: " Miklos Szeredi
2021-03-23 0:28 ` Eric Biggers
2021-02-03 12:41 ` [PATCH 08/18] gfs2: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 09/18] orangefs: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 10/18] xfs: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 11/18] efivars: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 12/18] hfsplus: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 13/18] jfs: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 14/18] nilfs2: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 15/18] ocfs2: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 16/18] reiserfs: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 17/18] ubifs: " Miklos Szeredi
2021-02-03 12:41 ` [PATCH 18/18] vfs: remove unused ioctl helpers Miklos Szeredi
2021-02-03 13:05 ` [PATCH 00/18] new API for FS_IOC_[GS]ETFLAGS/FS_IOC_FS[GS]ETXATTR Matthew Wilcox
2021-02-03 13:13 ` Miklos Szeredi
2021-02-03 13:58 ` Matthew Wilcox
2021-02-03 14:13 ` Miklos Szeredi
2021-02-03 14:28 ` Matthew Wilcox
2021-02-03 14:38 ` Miklos Szeredi
2021-02-03 14:56 ` Matthew Wilcox
2021-02-03 15:03 ` Miklos Szeredi
2021-02-08 2:00 ` Dave Chinner [this message]
2021-02-08 8:25 ` Miklos Szeredi
2021-02-08 14:02 ` Matthew Wilcox
2021-02-08 14:52 ` Miklos Szeredi
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