Hi, I just tested 3.7-rc1 and found that deleting a kernel tree on SSDs now takes approximately way too long to wait for (as in minutes), wherereas previously this took <1s. As soon as I remount with nodiscard the performance becomes tolerable again. It alss happens on two different SSDs (old Intel G2 & Corsair Force GT), both of which have otherwise excellent performance and show no noticeable impact of discard with kernels 3.6.x. Filesystem is ext4, but after reading various kernel changelog summaries it seems to be caused by multiple changes around discard behaviour in general. Is anyone else noticing this? I find it hard to believe that such a massive slowdown would go unnoticed.. thanks Holger -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
