Date: Fri, 9 Jun 2006 11:13:59 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Mikhail Teterin <mi+mx@aldan.algebra.com> Cc: fs@freebsd.org Subject: Re: heavy NFS writes lead to corrup summary in superblock Message-ID: <20060609081359.GH54415@deviant.kiev.zoral.com.ua> In-Reply-To: <200606081346.04908.mi%2Bmx@aldan.algebra.com>
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[-- Attachment #1 --] On Thu, Jun 08, 2006 at 01:46:04PM -0400, Mikhail Teterin wrote: > Our amd64 6.1-STABLE system is used to collect backup dumps from production > systems (mostly -- Solaris) via NFS. When in progrss, the dumps arrive at an > average rate of 20Mb/s. > > Every once in a while I notice a discrepancy in the amount of used space on > the backup FS as reported by df vs. that reported by the total du. > > Unmounting the FS and fsck-ing it fixes the problem with fsck reporting > (despite the clean unmount): > > SUMMARY BLK COUNT(S) WRONG IN SUPERBLK > SALVAGE? yes > > The FS is intended for very few very large files and was created > with "newfs -b 65536 -O1" (no softupdates). > > This workaround (explicit fsck) is acceptable for us, but it is a sign of some > kind of rot, and I thought, you'd like to know... > > Yours, > > -mi Wild guess: try rev. 1.673 of the sys/kern/vfs_subr.c. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFEiS3GC3+MBN1Mb4gRAn4NAKDOUaK171CGo8W458X0GrUgqzO1qgCfdJLC c5R3cNnLyJRu4jFqWOnxDkk= =Xq7v -----END PGP SIGNATURE-----home | help
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