Date: Sun, 26 Jul 1998 20:05:12 -0500 From: Karl Denninger <karl@mcs.net> To: Matthew Dillon <dillon@backplane.com> Cc: current@FreeBSD.ORG Subject: Re: Diablo corruption on the filesystem Message-ID: <19980726200512.02119@mcs.net> In-Reply-To: <199807270103.SAA09631@apollo.backplane.com>; from Matthew Dillon on Sun, Jul 26, 1998 at 06:03:13PM -0700 References: <199807270103.SAA09631@apollo.backplane.com>
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On Sun, Jul 26, 1998 at 06:03:13PM -0700, Matthew Dillon wrote: > :I turned off USE_PCOMMIT_SHM, USE_PCOMMIT_RW_MAP, USE_KP_RW_MAP and > :DO_COMMIT_POSTCACHE and recompiled diablo (but did NOT reinstall dnewslink, > :if that matters). > > I assume you mean DO_PCOMMIT_POSTCACHE here, not DO_COMMIT_POSTCACHE. Yes. > :Something significant happend when I changed the behavior of diablo > :internally. > : > :Does this shed any light on the issue? What have I actually done in terms > :of the calls made to the mmap routines by disabling these options? > > Hmmm. If DO_PCOMMIT_POSTCACHE is turned off the stress on the > history file will increase, but that's about it. It could also > have a slight serialization effect on multiple feeders that > are nearly-in-sync due to history file locking. > > *PCOMMIT_SHM & RW_MAP should not have any effect at all. Hmmm.... well, with those off and "q1" set I see no corruption. Remove the q1, and it *immediately* shows up again. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly / All Lines K56Flex/DOV | NEW! Corporate ISDN Prices dropped by up to 50%! Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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