On 3/4/14, 3:43 PM, Ric Wheeler wrote: > On 03/04/2014 11:26 PM, Przemek Klosowski wrote: >> On 02/28/2014 03:45 PM, Adam Williamson wrote: >>> As a server WG member I voted +1 on XFS as I have no particular objection to XFS as a filesystem, but I do think it seems a bit sub-optimal for us to wind up with server and desktop having defaults that are very similar but slightly different, for no apparently great reason. >> This may be a historical bias. XFS is a large code base (*), which means two things: a larger bug surface, and a larger memory footprint that used to be a problem for personal desktop-type machines but less so for better endowed servers. >> >> I understand that by now XFS got so much exercise that its >> robustness is unimpeachable. As to the size, I see that while the >> latest XFS kernel module is one of the larger kernel modules >> around, it probably is no longer significant on today's multi-GB >> systems---the extra megabyte at current memory prices is just a one >> cent increase in the system cost, after all. >> >> Having said that, I don't use XFS nowadays so I don't know how much >> more memory it allocates in typical use---can anyone comment on the >> actual memory footprint of running XFS? >> >> I am pretty sure that ext4 is a built-in module in Fedora kernels, >> as well as in the boot environment; making XFS the default will >> require also building it in, pretty much forever, while we still >> need extXX, and whatever comes next (btrfs?). I am OK with that, >> though.>> >> >> (*) 2.9MB of XFS source code vs 1.3MB in ext4 dirs >> (**) xfs.ko is 1.3MB >> >> > > You need to count the jbd2 code for ext4 as well, > > Ric > FWIW, I we looked at lines of code vs. megabytes of source, back in 3.4, and did a blog post about the trend lines: http://sandeen.net/wordpress/computers/linux-filesystems-loc-update/ I did count jbd2 in that, as well as the "common" mbcache code which in truth is only used for the extN filesystems. I suppose I need to do another update :) -Eric -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
