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Newsgroups: comp.os.386bsd.questions Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!agate!howland.reston.ans.net!xlink.net!subnet.sub.net!flatlin!bad From: bad@flatlin.ka.sub.org (Christoph Badura) Subject: Re: [BUG?] newfs with bsize = 16 kb ? Date: Tue, 26 Oct 1993 11:38:45 GMT Message-ID: <CFI5oM.n3u@flatlin.ka.sub.org> References: <1993Oct23.193511.18122@Informatik.TU-Muenchen.DE> <2agbtr$5v0@Germany.EU.net> <NEWSSERV!STARK!GENE.93Oct25153858@stark.uucp> Organization: Guru Systems/Funware Department Lines: 29 In <NEWSSERV!STARK!GENE.93Oct25153858@stark.uucp> newsserv!stark!gene@cs.sunysb.edu (Gene Stark) writes: >The following comments can be found in the "install" script on the >FreeBSD gamma filesystem floppy. I don't know who wrote them or the details >of why different blocking factors trash the VM system, but this may be an >indication as to why you are not able to increase the blocking factor of >your partitions without strange errors. Different block factors for different partitions on the same disk worked in 386BSD0.1, I believe. I think we installed it that way, but can't check because the box now runs NetBSD. The answer as to why a blocksize larger than MAXBSIZE trashes system memory is that in NetBSD0.9 the routines in vfs_bio.c make no attempt whatsoever to prevent the allocation of a buffer greater than MAXBSIZE but will not allocate more than MAXBSIZE of memory to the buffer. Consider this a bug report. :-) As to why Mr. Wiserner's system trashes the filesystems one can only speculate, as he choose not to tell us which version he is running. -- Christoph Badura bad@flatlin.ka.sub.org +49 721 606137 The GOTO is back, and not only in the pages of the ACM Forum! The Ollie North of language commands is turning up ... -- D.Foster, CACM V30#8 p. 659