Date: Wed, 07 May 2003 14:45:00 -0500 From: "Alan L. Cox" <alc@imimic.com> To: Ian Dowse <iedowse@maths.tcd.ie> Cc: alc@freebsd.org Subject: Re: Panic in ffs_blkfree() Message-ID: <3EB9623C.94365A8F@imimic.com> References: <200305030537.ab79568@salmon.maths.tcd.ie>
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Ian Dowse wrote: > > In message <3EB2FB35.8060104@btc.adaptec.com>, Scott Long writes: > >Kirk and all, > > > >Recently a panic started appearing on mine and other's systems while > >under load. I have an SMP system with all UFS1+softupdates > > Try reverting revisions sys/vm/vm_object.c 1.274 and kern/vfs_subr.c > revision 1.444, i.e. apply the patch below. I think there may be > cases where the `all' flag was necessary; instrumentation of > vm_object_page_remove() in a kernel from Apr 5th shows cases where > pages with both wrapped negative (indirection blocks I presume) and > larger than object->size page indices get selected, so this would > have been broken by limiting the range to < object->size. > Please take a look at vm_object_page_clean(). If end == 0, it relies on object->size to determine the extent of the pages for cleaning. In light of the above, particularly, the positive indices, we should be worried that msync is skipping pages. Alanhome | help
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