Date: Sun, 26 Jul 1998 09:47:54 -0700 From: Mike Smith <mike@smith.net.au> To: Karl Denninger <karl@mcs.net> Cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, Dan Swartzendruber <dswartz@druber.com>, current@FreeBSD.ORG Subject: Re: MMAP problems Message-ID: <199807261647.JAA10667@antipodes.cdrom.com> In-Reply-To: Your message of "Sun, 26 Jul 1998 09:50:49 CDT." <19980726095049.51700@mcs.net>
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> 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. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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