Date: Sun, 26 Jul 1998 13:46:52 -0500 From: Karl Denninger <karl@mcs.net> To: Mike Smith <mike@smith.net.au> Cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, Dan Swartzendruber <dswartz@druber.com>, current@FreeBSD.ORG Subject: Re: MMAP problems Message-ID: <19980726134652.16525@mcs.net> In-Reply-To: <199807261647.JAA10667@antipodes.cdrom.com>; from Mike Smith on Sun, Jul 26, 1998 at 09:47:54AM -0700 References: <19980726095049.51700@mcs.net> <199807261647.JAA10667@antipodes.cdrom.com>
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On Sun, Jul 26, 1998 at 09:47:54AM -0700, Mike Smith wrote: > > And I can confirm that the trash IS being written to disk; its definitely > > there on stable storage when you go look for it later. > > > > The data which gets written is usually a block of zeros, but it may not be; > > it can also be random trash. Its also not always one block (it could be > > more than one), but it IS always, at least from what I'm seeing here, a > > multiple of 512 bytes (disk blocksize). > > The significant question in light of Garrett's description seem to be > whether the trash that's written is actually being written by the > process in error because that's what it got from a previous read, or > whether the process is actually writing the right stuff and it's being > corrupted on the way down. Its relavent data (its not COMPLETE junk; rather, its pieces of another article), so I would say its probably being written in error from a previous read. -- -- 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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