On Tue, 1 Apr 2014 01:30:18 -0400, Theodore Ts'o <tytso@xxxxxxx> wrote: > On Mon, Dec 02, 2013 at 05:32:06PM +0100, Lukáš Czerner wrote: > > Hi all, > > > > this is the patch I send a while ago to fix the issue I've seen with > > a global allocation goal. This might no longer apply to the current > > kernel and it might not be the best approach, but I use this example > > just to start a discussion about those allocation goals and how to > > use, or change them. > > > > I think that we agree that the long term fix would be to have free > > extent map. But we might be able to do something quickly, unless > > someone commits to make the free extent map reality :) > > Hi Andreas, > > We discussed possibly applying this patch last week at the ext4 > workshop, possibly as early as for the 3.15 merge window: > > http://patchwork.ozlabs.org/patch/295956/ > > However, I'm guessing that Lustre has the workload which is most > likely to regress if we were to simply apply this patch. But, it's > likely it will improve things for many/most other ext4 workloads. > > We did talk about trying to assemble some block allocation performance > tests so we can better measure proposed changes to the block > allocator, but that's not something we have yet. However, this global BTW where this can I find this discussion? I would like to cooperate this that activity. Please CC me next time you will disscuss allocation performance mesurments. At Parallels we run https://oss.oracle.com/~mason/compilebench/ as load simulator. > goal is definitely causing problems for a number of use cases, > including thinp and being flash friendly. > > Would you be willing to apply this patch and then run some benchmarks > to see if Lustre would be impacted negatively if we were to apply this > patch for the next development cycle (i.e., not for 3.15, but for the > next merge window)? > > Thanks, > > - Ted > -- > 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 -- 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
