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A comment on Working with Files Is Hard (2019). Parent comment

Re:Working with Files Is Hard (2019) by kragen on Saturday January 25, 2025 @10:15AM (#42822081)
That flushes, just like the fsync() system call mentioned in Luu's post.
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Re:Working with Files Is Hard (2019) by ryao on Saturday January 25, 2025 @11:09AM (#42822441)
It actually writes dirty data and then flushes.

That said, IO barriers in storage are typically synonymous with flushes. For example, the ext4 nobarrier mount option disables flushes.

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