On Tue, Apr 02, 2013 at 07:16:13PM -0400, Theodore Ts'o wrote: > I've tried doing some quick timing, and if it is a performance > regression, it's not a recent one --- or I haven't been able to > reproduce what Mel is seeing. I tried the following commands while > booted into 3.2, 3.8, and 3.9-rc3 kernels: > > time git clone ... > rm .git/index ; time git reset > FWIW, I had run a number if git checkout based tests over time and none of them revealed anything useful. Granted it was on other machines but I don't think it's git on its own. It's a combination that leads to this problem. Maybe it's really an IO scheduler problem and I need to figure out what combination triggers it. > <SNIP> > > Mel, how bad is various git commands that you are trying? Have you > tried using time to get estimates of how long a git clone or other git > operation is taking? > Unfortunately, the milage varies considerably and it's not always possible to time the operation. It may be that one occasion that opening a mail takes an abnormal length time with git operations occasionally making it far worse. -- Mel Gorman SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>