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Open Source and information security mailing list archives
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Date: Sun, 10 Jun 2007 18:31:48 +0000 From: Pavel Machek <pavel@....cz> To: Mark Lord <lkml@....ca> Cc: Chuck Ebbert <cebbert@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, Stephen Tweedie <sct@...hat.com>, Theodore Ts'o <tytso@....edu>, Linux Kernel <linux-kernel@...r.kernel.org> Subject: Re: ext3fs: umount+sync not enough to guarantee metadata-on-disk Hi! > >>Did this succeed? If the application is still > >>truncating that file, the > >>umount should have failed. > > > >Shouldn't sync should wait for truncate to finish? > > The part that gets me here, and that others might be > missing, > is that we are not waiting for ftruncate at this point. > > We're waiting for unlink. The application that was > doing ftruncate > in tiny little doses has been sent a kill-9 signal, so > what should > be happening now (confirmed by disk activity LEDs) is > the file should > just be getting deleted the same as if we did "rm > bigfile" on it. Well, AFAICT kill-9 signal delivery can take time. It still might be doing ftruncate. It would be interesting to know when in that sequence mythtv dies... or perhaps put loop 'while killall -9 mythtv returns success, sleep 1' into shutdown scripts? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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