Re: sync(1) not really syncing??

[Jonathan Schleifer <js-netbsd-users%webkeks.org@localhost>]

Am 11.09.2008 um 14:37 schrieb Antti Kantee:

> Please, actually study the kernel code before making incorrect claims.
> There is no such possibility for a large file DoS in NetBSD since  
> files
> are flushed as they are written (this, however, may be argued to be
> suboptimal ...).
>
> Also, sync does not necessarily even start to sync all buffers.   
> Unmount,
> however, does, and it also waits for buffers to be synced.  Even so,
> it is implemented in the file system and some file systems may have  
> bugs

Please read again what I wrote. I said it's NOT like that atm, but the  
OP proposed to stall the whole system when you type sync. And that  
*WOULD* _DEFINITELY_ allow for a DoS, if that change would be made. It  
can be a blocking syscall, that's ok, but NEVER block the whole system  
- that's not acceptable, but what the OP suggested.

--
Jonathan

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