Date: Sun, 1 Jan 2012 17:04:23 -0800 From: "David P. Discher" <dpd@bitgravity.com> To: Gleb Kurtsou <gleb.kurtsou@gmail.com> Cc: freebsd-fs@freebsd.org, Johannes Totz <jtotz@imperial.ac.uk> Subject: Re: fusefs broken on 8-stable? Message-ID: <F12574C7-B4DB-4928-BA0F-D8DC3E1ED33A@bitgravity.com> In-Reply-To: <20111230090256.GA6796@reks> References: <iqj9pf$mrn$1@dough.gmane.org> <isc2ui$kq$1@dough.gmane.org> <87E5C7D5-2D73-4A42-B871-8B27448B0DD9@bitgravity.com> <20111229215125.GA8539@reks> <C2F65D41-3D0D-4453-9046-BB85AF66860B@bitgravity.com> <20111230090256.GA6796@reks>
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On Dec 30, 2011, at 1:02 AM, Gleb Kurtsou wrote: > On (29/12/2011 14:06), David P Discher wrote: >> Is this a straight dump for p4 ? =20 >>=20 >> Earlier this week, I checked out = //depot/projects/soc2011/ilya_fuse/... out of p4. But only used the = kmod, not the libs. Unfortunately, it was 10x slower than the 0.3.9 = version currently in the ports tree. I never got it to the same point = ... after a few days, had only written about 6-10GB of data. >=20 > It's the same as p4 (+ few minor tweaks). fuse-0.4 is more strict on > resizing files which is very likely to be slow for encrypted file > system (encfs). Try setting sysctl vfs.fuse.sync_resize=3D0. Got this port started, however its still around 10-60x slower than the = 0.3.9 version in the ports tree. vfs.fuse.sync_resize seemed to make no = difference. Granted this is a custom fusefs that I'm comparing, based = off of bbfs (http://www.cs.nmsu.edu/~pfeiffer/fuse-tutorial/). >=20 > I don't know all the details but there was memory leak and arbitrary > memory corruption in old fuse. It's believed to be fixed in fuse-0.4. = My > guess you are hitting the same bug. I've compared the functions in the stack the trace, and have found no = change between 0.4.4 and 0.3.9. If you (or anyone else on the list) = knows what patches are the memory leak and corruption fixes are - I'd = like to attempt to back port them into 0.3.9. I'd like the stability = and speed.=20 --- David P. Discher dpd@bitgravity.com * AIM: bgDavidDPD BITGRAVITY * http://www.bitgravity.com
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