https://bugzilla.kernel.org/show_bug.cgi?id=16380 --- Comment #14 from Artem S. Tashkinov <t.artem@xxxxxxxxxxxx> 2012-08-04 18:51:24 --- (In reply to comment #12) > I wasn't able to duplicate this with an underlying ext4 file system, with the > loop file system being ext2, using a 3.5 kernel on a system with 16G. > > I tried both using a variety of small and medium sized files, as well as one > very large file, and I didn't see any unexplained stuttering in write > bandwidth. (There were times when cp -r was clearly writing to the in-memory > page cache, and the writeback hadn't begone yet. There were also times when > we couldn't do any more writing, because we were busy reading from the source > drive. But it all looked pretty normal to me.) Hm, I cannot reproduce the problem with a loop device on top of tmpfs either, but I've just checked my 250GB ext4 partition and the bug is still there: When I try to copy a 3GB file (residing in tmpfs so it's all cached) to it, there's a 4 (four) seconds delay before a single byte gets written to the destination partition. After that all consequent files get written without any delays. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- 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
