Hi Amir, Le mercredi 08 novembre 2017, Amir Goldstein a écrit : > The problem reported by Raphael is that new PostgreSQL 10.0 with a > database in overlayfs where lower layer in squashfs fails to start. > The failure is due to fsync error, when PostgreSQL does fsync on all > existing db directories on startup and a specific directory exists > lower layer with no changes. I confirm that this patch is enough to fix my issue. Tested-by: Raphaël Hertzog <hertzog@xxxxxxxxxx> I wonder if we can have a similar problem with a file. Is it possible to fsync a file opened in read-only mode? Even if it's possible, I assume this is really rare. And when you open a file with read-write permissions, when does the copy-up happen? If it's immediately, then fsync on such a file is safe as well. Cheers, -- Raphaël Hertzog ◈ Writer/Consultant ◈ Debian Developer Discover the Debian Administrator's Handbook: → https://debian-handbook.info/get/ -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html