Re: [PATCH] Allow SysRq emergency sync to thaw frozen filesystems

From: Valdis . Kletnieks
Date: Fri Jan 16 2009 - 10:17:48 EST

On Fri, 16 Jan 2009 09:48:28 +0100, Pavel Machek said:

> Emergency Sync should not do this. Invent another key.
> ...because otherwise, if you hit emergency sync but the system is
> still alive and relies on filesystem freezing, bad stuff will happen.

Under what conditions would a system be alive and relying on freezing,
*and* an emergency thaw would be worse than whatever reason you're doing
an emergency sync?

Hmm.. guess you *could* get into trouble if you tried to do a Sysrq-[not-s]
and hit the wrong key - but you have the same danger if you have *any*
sysrq- invoking an emergency_thaw and hit it by accident...

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