Date: Sat, 17 Jan 2004 18:50:15 +0100 From: Thierry Herbelot <thierry@herbelot.com> To: Peter Wood <peter@alastria.net>, freebsd-current@freebsd.org Subject: Re: FreeBSD 5.2R+C: panic: kmem_malloc(4096): kmem_map too small Message-ID: <200401171850.15746.thierry@herbelot.com> In-Reply-To: <l1ri00tvjp8nn15pcsg4nurm8hmmr8m26q@4ax.com> References: <l1ri00tvjp8nn15pcsg4nurm8hmmr8m26q@4ax.com>
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Le Saturday 17 January 2004 18:25, Peter Wood a écrit : > Good Evening, > > I have come accross a reproducable panic in bother 5.2-Release and > 5.2-Current (as it was an hour ago). To perform this, I create two 750Mb > memory disks, format them and mount them. The machine has 2Gb of RAM, of > which no more then 90mb is active. Hello, from what I've gathered, the md disks are allocated from the kernel address space, which is limited (see the line with "options KVA_PAGES=260" in the NOTES kernel config file). Anyway, on ia32, the 4GB address space has to be sahred between kernel and processes : let's go to the AMD64 ! I could recently make a RAM disk for "making buildworld", with a KVA_PAGES of 512, an installed RAM of 2G and disks of 500MB for src and 700MB for objs. TfH
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