https://bugzilla.kernel.org/show_bug.cgi?id=219362 --- Comment #6 from Alan Stern (stern@xxxxxxxxxxxxxxxxxxx) --- The 'u' sysrq code attempts to remount all mounted filesystems read-only. Shouldn't that send a synchronize-cache command to the SSD? If it doesn't, there's something wrong. It's also possible that Tomas is sending the 'o' poweroff sysrq code too soon after the 'u' code, leaving the system insufficient time to flush the cache before it powers off. Tomas, the 'o' code does not shut down devices at all, let alone give them a chance to clean up first. As Greg said, it is meant for emergency use. All it does is turn off the system power -- it does not perform a clean shutdown. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
