Matthew Wilcox: How Linux handles IO errors -- PGCon 2018
fsyncgate
The Linux kernel's handling of I/O errors is inconsistent and frustrating.
This talk will explain why some of these problems exist and discuss what we might be able to do to improve them in the future. I'll cover how Linux buffered I/O works and what it does when it encounters an error.
https://www.pgcon.org/2018/