Re: [PATCH] xfs: fix incorrect log_flushed on fsync

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On Fri, Sep 01, 2017 at 01:37:28PM +0300, Amir Goldstein wrote:
> Well since the bug was demonstrated using crash simulator,
> I have no idea how often one would run into this with actual power
> failure, but does it really matter how often, if we *know* that it can
> happen?

No, the issue is real.  I wonder how much of an issue the additional
flushes are in practice.

> I am working on a variant of the flushseq you suggested using
> log->l_last_sync_lsn that may be simple enough and not as painful
> as turning off optimization for WANT_SYNC log buffer.

Ok, I'll take a look once you post it.
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