[Lustre-discuss] Lustre 1.8.7 kernel patches for SLES11

Charland, Denis Denis.Charland at imi.cnrc-nrc.gc.ca
Thu Dec 22 08:18:23 PST 2011

> I don't know why it would have been removed.  I find the sd_iostats very useful.
>It provides stats for any "sd" disk.  So if you are using SCSI or SAS, and SATA in scsi-emulation mode (ie: no if you get IDE's /dev/hd*, but >yes if you get /dev/sd*)

Here's the link to the bug report:


Looks like this is Cray related only. Since I'm not using this functionality I'll remove this patch from my own patch file just in case. Anyway, newer
kernels have a tool called blktrace that can be used to collect the same kind of statistics through ftrace (see comment #42 and up).


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