2011-06-12 23:57, Richard Elling wrote:
How long should it wait? Before you answer, read through the thread:
http://lists.illumos.org/pipermail/developer/2011-April/001996.html
Then add your comments :-)
-- richard
Interesting thread. I did not quite get the resentment against
a tunable value instead of a hard-coded #define, though.
Especially if we might want to somehow tune it per-device,
i.e. CDROM, enterprise SAS and some commodity drive or a
USB stick (or a VMWare emulated HDD, as Ceri pointed out)
might all be plugged into the same box and require different
timeouts only the sysadmin might know about (the numeric
values per-device). So I'd rather go with some hardcoded
default and many tuned lines in sd.conf, probably.
But the point of my previous comment was that, according
to the original poster, after a while his disk did get
marked as "faulted" or "offlined". IF this happened
during the system's initial uptime, but it froze anyway,
it it a problem.
What I do not know is if he rebooted the box within the
5 minutes set aside for the timeout, or if some other
processes gave up during the 5 minutes of no IO and
effectively hung the system.
If it is somehow the latter - that the inaccessible drive
did (lead to) hang(ing) the system past any set IO retry
timeouts - that is a bug, I think.
But maybe I'm just too annoyed with my box hanging with
a more-or-less reproducible scenario, and now I'm barking
up any tree that looks like system freeze related to IO ;)
//Jim
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