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Re: [dm-devel] How to avoid lots of read ios to passive paths of active-passive storage devices?



On 2005-07-08T00:21:21, "goggin, edward" <egoggin emc com> wrote:

> How sould device scanning utilities like blkid, pvscan,
> vgscan, and lvscan (others?) be made to avoid issuing
> a significant number of read ios to passive paths of
> active-passive storage devices?

Good question.

One could argue that if we issue a bd_claim() (I know, it's falling out
of favour ;-), we might want to issue a theoretical bd_claim_exclusive()
which excludes anyone else from messing with our precciiioussss: ie,
everybody else would be denied open().


Sincerely,
    Lars Marowsky-Brée <lmb suse de>

-- 
High Availability & Clustering
SUSE Labs, Research and Development
SUSE LINUX Products GmbH - A Novell Business	 -- Charles Darwin
"Ignorance more frequently begets confidence than does knowledge"


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