Date: Mon, 5 Mar 2001 18:31:20 -0500 (EST) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: oberman@es.net Cc: stable@freebsd.org Subject: Re: Annoying gotcha with soft updates Message-ID: <200103052331.SAA57724@khavrinen.lcs.mit.edu> In-Reply-To: <200103052209.f25M9DL22452@ptavv.es.net>
next in thread | previous in thread | raw e-mail | index | archive | help
In article <200103052209.f25M9DL22452@ptavv.es.net> you write: >I believe the problem lies in the way soft updates deals with deleted >files. It seems to only add them to the free space on a periodic >basis. Yes. Kirk told me that he has a fix for this. I proposed to him that the summary information ought to be updated immediately once the kernel is committed to freeing space, even if the space isn't actually free yet. Unfortunately, this leads either to POLA violation (statfs() claims there is space free but allocations fail) or a deadlock arising from the way locking is done in the filesystem code. As a result of some work Kirk did on soft updates for Yahoo! it is now possible to avoid the deadlock, but the actual behavior hasn't been changed yet. I think it should be fixed for 5.0. -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200103052331.SAA57724>