Hi, I am using ext4 as root filesystem of my TQMa28-based board with 2GB eMMC. In case of a power failure I have to clean up the filesystem in 1.5 to 2 seconds, that's how long the caps can sustain the power. I pass the following rootflags on the kernel cmdline: data=journal,commit=1 In my user space application I open important files with O_SYNC. Is there something else I can or should do to avoid data corruption? I can detect when the power fails over a GPIO line, so I close open file descriptors in one important application but doing a "normal" poweroff/shutdown takes too long. What would you do if you had 1.5 seconds until the power is gone? Maybe a read-only rootfs and a separate small data partition? Thanks for your help. Best regards, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
