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List:       linux-xfs
Subject:    Re: [RFC PATCH v1 00/30] fs: inode->i_version rework and optimization
From:       Boaz Harrosh <openosd () gmail ! com>
Date:       2017-03-30 21:11:11
Message-ID: 42bec37f-670c-3ea1-f2aa-7cecd619ad7e () gmail ! com
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On 03/30/2017 09:35 PM, Jeff Layton wrote:
<>
> Yeah, I imagine we'd need a on-disk change for this unless there's
> something already present that we could use in place of a crash counter.
> 

Perhaps we can use s_mtime and/or s_wtime in some way, I'm not sure
what is a parallel for that in xfs.
	s_mtime - time-of-last mount 
	s_wtime - time-of-last mount, umount, freez, unfreez, remount, ...
Of course you'll need a per FS vector to access that.

But this will need some math foo to get the bits compacted correctly
just a thought.

Thanks
Boaz

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