Re: multiple pending filesystem requests for the same block ?

From: Poul-Henning Kamp <phk_at_phk.freebsd.dk>
Date: Tue, 26 Jul 2005 15:56:58 +0200
In message <20050726065444.A37735_at_xorpc.icir.org>, Luigi Rizzo writes:
>(context: SoC work on pluggable disk schedulers,
>	http://wikitest.freebsd.org/moin.cgi/Hybrid
>
>
>The doubt we have is the following:
>
>	can the filesystem code have multiple pending write requests for
>	the same disk block ?

If the filesystem does that, it will get no guarantee in which order
they are written.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk_at_FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
Received on Tue Jul 26 2005 - 11:57:04 UTC

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