I was running some of the xfstests enospc tests on ext4, and they were failing; in one case, manymanymany small files are made to fill up a 100M filesystem. ext4 stops quite early with -ENOSPC, but after a bit, (or after a "sync") we get 40MB free again. So 40% of the fs space is hidden somewhere in preallocation... I tried calling out to discard group prealloc but that's only a few blocks. I'll go trace through the sync paths to see what all gets released, but if anyone knows offhand where the rest of that space is hiding, please give me a shout. :) Thanks, -Eric -- 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
