Messages in this thread | | | Date | Fri, 10 Jul 2009 12:43:30 +0400 | From | Vladislav Bolkhovitin <> | Subject | Re: [RESEND] [PATCH] readahead:add blk_run_backing_dev |
| |
Ronald Moesbergen, on 07/10/2009 10:32 AM wrote: >> I've also long ago noticed that reading data from block devices is slower >> than from files from mounted on those block devices file systems. Can >> anybody explain it? >> >> Looks like this is strangeness #2 which we uncovered in our tests (the first >> one was earlier in this thread why the context RA doesn't work with >> cooperative I/O threads as good as it should). >> >> Can you rerun the same 11 tests over a file on the file system, please? > > I'll see what I can do. Just te be sure: you want me to run > blockdev-perftest on a file on the OCFS2 filesystem which is mounted > on the client over iScsi, right?
Yes, please.
> Ronald. > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
| |