On Thu, Jun 25, 2015 at 06:12:57PM -0400, Theodore Ts'o wrote:
On Thu, Jun 25, 2015 at 02:46:44PM -0400, J. Bruce Fields wrote:
Looks OK to me. As I say I'd expect i_version_seen == true to end up
being the common case in a lot of v4 workloads, so I'm more skeptical of
the claim of a
On Tue, Jun 23, 2015 at 12:32:41PM -0400, Theodore Ts'o wrote:
On Thu, Jun 18, 2015 at 04:38:56PM +0200, David Sterba wrote:
Moving the discussion to fsdevel.
Summary: disabling MS_I_VERSION brings some speedups to btrfs, but the
generic 'noiversion' option cannot be used to achieve
On Thu, Jun 25, 2015 at 02:46:44PM -0400, J. Bruce Fields wrote:
Does this sound reasonable?
Just to make sure I understand, the logic is something like:
to read the i_version:
inode-i_version_seen = true;
return inode-i_version
to update the
On Tue, Jun 23, 2015 at 12:32:41PM -0400, Theodore Ts'o wrote:
On Thu, Jun 18, 2015 at 04:38:56PM +0200, David Sterba wrote:
Moving the discussion to fsdevel.
Summary: disabling MS_I_VERSION brings some speedups to btrfs, but the
generic 'noiversion' option cannot be used to achieve
On Wed, Jun 24, 2015 at 08:02:15PM +0200, David Sterba wrote:
This sounds similar to what Dave proposed, a per-inode I_VERSION
attribute that can be changed through chattr. Though the negated meaning
of the flag could be confusing, I had to reread the paragraph again.
Dave did not specify an
On Wed, Jun 24, 2015 at 07:17:50PM -0400, Theodore Ts'o wrote:
On Wed, Jun 24, 2015 at 08:02:15PM +0200, David Sterba wrote:
This sounds similar to what Dave proposed, a per-inode I_VERSION
attribute that can be changed through chattr. Though the negated meaning
of the flag could be
On Tue, Jun 23, 2015 at 12:32:41PM -0400, Theodore Ts'o wrote:
This has caused pain for the nfsv4 folks since it means that they need
to tell people to use a special mount option for ext4 if they are
actually using this for nfsv4, and I suspect they won't be all that
eager to hear that btrfs
On Tue, Jun 23, 2015 at 06:42:15AM +1000, Dave Chinner wrote:
On Thu, Jun 18, 2015 at 04:38:56PM +0200, David Sterba wrote:
Moving the discussion to fsdevel.
Summary: disabling MS_I_VERSION brings some speedups to btrfs, but the
generic 'noiversion' option cannot be used to achieve that.
On Thu, Jun 18, 2015 at 04:38:56PM +0200, David Sterba wrote:
Moving the discussion to fsdevel.
Summary: disabling MS_I_VERSION brings some speedups to btrfs, but the
generic 'noiversion' option cannot be used to achieve that. It is
processed before it reaches btrfs superblock callback,
On Thu, Jun 18, 2015 at 04:38:56PM +0200, David Sterba wrote:
Moving the discussion to fsdevel.
Summary: disabling MS_I_VERSION brings some speedups to btrfs, but the
generic 'noiversion' option cannot be used to achieve that. It is
processed before it reaches btrfs superblock callback,
On Thu, Jun 18, 2015 at 04:38:56PM +0200, David Sterba wrote:
AFAICS, ext4 had added it's own i_version before iversion was added to
mount:
It is not so unusual that some mount option is introduced as
fs-specific and later re-implemented as generic (another example is
MS_LAZYTIME). The mount(8)
Moving the discussion to fsdevel.
Summary: disabling MS_I_VERSION brings some speedups to btrfs, but the
generic 'noiversion' option cannot be used to achieve that. It is
processed before it reaches btrfs superblock callback, where
MS_I_VERSION is forced.
The proposed fix is to add
On Wed, Jun 17, 2015 at 07:01:18PM +0200, David Sterba wrote:
On Wed, Jun 17, 2015 at 11:52:36PM +0800, Liu Bo wrote:
On Wed, Jun 17, 2015 at 05:33:06PM +0200, David Sterba wrote:
On Wed, Jun 17, 2015 at 03:54:31PM +0800, Liu Bo wrote:
MS_I_VERSION is enabled by default for btrfs, this
On Wed, Jun 17, 2015 at 03:54:31PM +0800, Liu Bo wrote:
MS_I_VERSION is enabled by default for btrfs, this adds an alternative
option to toggle it off.
There's an existing generic iversion/noiversion mount option pair, no
need to extra add it to btrfs.
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On Wed, Jun 17, 2015 at 11:52:36PM +0800, Liu Bo wrote:
On Wed, Jun 17, 2015 at 05:33:06PM +0200, David Sterba wrote:
On Wed, Jun 17, 2015 at 03:54:31PM +0800, Liu Bo wrote:
MS_I_VERSION is enabled by default for btrfs, this adds an alternative
option to toggle it off.
There's an
On Wed, Jun 17, 2015 at 05:33:06PM +0200, David Sterba wrote:
On Wed, Jun 17, 2015 at 03:54:31PM +0800, Liu Bo wrote:
MS_I_VERSION is enabled by default for btrfs, this adds an alternative
option to toggle it off.
There's an existing generic iversion/noiversion mount option pair, no
need
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