Hi, > I've recently run into an issue with ext4 and delayed allocation where > my system will silently hang just seconds into a dbench run. I first > saw this using 2.6.30.9, but it still happens with 2.6.32-rc8. I've > tried with an SMP x86_64 system, and a UP i386 system. The SMP x86_64 > system hangs every time for me within 15 seconds, but the UP i386 > system never hangs on me. If I remount with -o nodelalloc on the SMP > system, the hang goes away. There are no messages printed out by the > kernel; it just locks hard. Has anyone seen this before? I'm just > running "dbench 500" to produce this behavior. Can you still switch consoles after the system hangs (it's good to debug this on a text console)? If yes, could you press Alt-Sysrq-w and take a picture of the console by digital camera or so (take pictures of as many screens as possible using console scrollback)? Thanks. Honza -- Jan Kara <jack@xxxxxxx> SuSE CR Labs -- 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
