On Sun, 2009-11-01 at 12:03 -0500, Eric Smith wrote: > Antoine Pitrou wrote: > > Adam Olsen <rhamph <at> gmail.com> writes: > >> Looks like an OS bug to me. Linux I'm guessing? > > > > Yes, but only on certain boxes. I could never reproduce on my home box. > > RDM (David)'s buildbot is a Gentoo vserver with a reiserfs filesystem. > > You'll occasionally see something similar on Windows boxes running FAT, > because the timestamps stored in the filesystem have a 2 second > granularity there. Not sure if this might be similar, or just a reiserfs > issue.
Some years ago there was a bug where the dentry cache held timestamps more granular than those that the filesystem could represent. We saw this cause build failures which were troubling to reproduce :) I haven't seen Linux arbitrarily invent time travel so far:). The FAT rounding issue is a possibility, but I didn't think reiserfs was short that much precision. I'd check that the work area you had really was reiser, not a mounted AT partition, and if its not look up the ReiserFS precision for mtime. -Rob
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