From owner-freebsd-hackers  Wed Nov  4 09:57:05 1998
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From: Luigi Rizzo <luigi@labinfo.iet.unipi.it>
Message-Id: <199811041554.QAA19119@labinfo.iet.unipi.it>
Subject: Re: How sync() gets called every 30 seconds?
To: seggers@semyam.dinoco.de (Stefan Eggers)
Date: Wed, 4 Nov 1998 16:54:54 +0100 (MET)
Cc: bf20761@binghamton.edu, freebsd-hackers@FreeBSD.ORG,
        seggers@semyam.dinoco.de
In-Reply-To: <199811041746.SAA02575@semyam.dinoco.de> from "Stefan Eggers" at Nov 4, 98 06:46:08 pm
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> > Hi, Can anyone tell me where in the source code the sync() (in
> > vfs_syscalls.c) is set up to be called every 30 seconds?
> 
> In vfs_subr.c with a SYSINIT_KT() and an associated struct.  This
> creates a process which consists of sched_sync.

speaking of this... is this parametrized ? On a laptop, i wonder if
syncing every 30s while doing ordinary activities (e.g. editing) defeats
completely the disk auto-shutdown routines. Because power failures are
less frequent (i hope!) in that environment, is there any other reason
to have frequent SYNCs ?

	luigi


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