From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: References: <7d3530220906180930p575fcb4bk473decb7d1a89c27@mail.gmail.com> Date: Thu, 18 Jun 2009 10:10:42 -0700 Message-ID: <7d3530220906181010l25557061k774bb250a4a2e6dd@mail.gmail.com> From: John Floren To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [9fans] fossil/venti falling down? Topicbox-Message-UUID: 0ce89e66-ead5-11e9-9d60-3106f5b1d025 On Thu, Jun 18, 2009 at 9:45 AM, erik quanstrom wro= te: > > > It seems to only happen once per boot, but not necessarily when fossil > > starts responding--I've seen it a couple hours after booting, which > > the filesystem tends to go away at night. > > the failure is somewhere in blockWrite. =C2=A0since blockWrite > calls diskWrite and diskWrite just queues up i/o to send > to the disk, it's not possible to get i/o errors directly from > blockWrite. > > there are two case that do return errors. > > one is if the block can't be locked. =C2=A0a runaway periodic function > would make that more likely, since we don't wait for the lock. > but it seems more likely in this case that some of fossil's data is > corrupted since this started after the double-failure. > see http://9fans.net/archive/2009/03/487 > > the other case is a funny dependency. =C2=A0there's a fprint there > that's commented out. > > - erik > Here's another message that may be of interest. I ran fshalt before rebooting (to test the periodicthread patch) and saw this: syncing.../srv/fscons...prompt: sourceRoot: fs->ehi =3D 5395, b->l =3D BtDir,3,Copied,e=3D5394,-1,tag=3D0x1 venti... halting.../srv/fscons...archive vac:a9d9b0b9fe0db783fe618f680804a18df532a67= a I don't remember seeing that "sourceRoot: ..." stuff before; as soon as the system comes back up I guess I'll take a look at source. John -- "I've tried programming Ruby on Rails, following TechCrunch in my RSS reader, and drinking absinthe. It doesn't work. I'm going back to C, Hunter S. Thompson, and cheap whiskey." -- Ted Dziuba