Hello, I'm using Hynix eMMC4.41 with Linux kernel 3.4.5. After mounting ext4 partition /userdata with 'discard' mount option enabled, fs triggers TRIM commands to eMMC after every file deletion. With this setup, for a continuous reboot test (5s awake and issue reboot and repeat) with 10 or 20 iterations, i see data corruption in eMMC consistently. mount options are :- noatime,nosuid,nodev,noauto_da_alloc,discard encryptable="path" What am i missing here? if 'discard' mount option is removed, then no data corruption in eMMC for more than 200 iterations. Does TRIM needs some extra care? BKOPS is not enabled in eMMC (is bkops mandatory if using TRIM?) Are there any latest patches which address these corruption issues during reboot with discard option enabled? Please help to analyze further. Thanks, Prasanna NAVARATNA -- 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
