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Date:   Sat, 02 Feb 2019 04:01:14 +0000
Subject: [Bug 202485] chmod'ed permission not persisted upon fsync

Vijay Chidambaram ( changed:

           What    |Removed                     |Added
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--- Comment #2 from Vijay Chidambaram ( ---
Hi Seulbae,

Adding on to what Ted said, the POSIX standards are not very specific about
crash-consistency guarantees. I'd recommend you go through the ext4/btrfs/xfs
mailing lists searching for "Vijay Chidambaram", Jayashree Mohan", or "Ashlie
Martinez" to find prior discussions and other potential dead-ends. The previous
discussions also document the guarantees provided by the widely-used Linux file
systems, so that you know what is a bug and what is not. 

For example, a symlink also does not have crash-consistency guarantees:

Our OSDI paper has more details:

Vijay Chidambaram, UT Austin

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