Date: Fri, 25 Feb 2000 07:50:49 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: David Gilbert <dgilbert@velocet.ca>, freebsd-current@FreeBSD.ORG Subject: Re: Wierd AMD panics caused by VMWare? Message-ID: <Pine.BSF.4.21.0002250740030.7691-100000@alphplex.bde.org> In-Reply-To: <200002232043.MAA31642@apollo.backplane.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 23 Feb 2000, Matthew Dillon wrote: [I wrote] > :See PR 16568. pmap_remove_all() doesn't flush the TLB properly in > :FreeBSD-3.x on i386's. Somehow this doesn't cause many problems, but > :it fairly reliably breaks the free() in fdfree() when there was a file > :descriptor larger than about 1000 (this gives a free() of more than > :MAXALLOCSAVE = 2 pages) when there is a lot of fork() activity. > Ahh. I presume you will commit this patch now that Bjoern has > confirmed that it works? Not until the reason that it works is understood. > I don't know why an unconditional invltlb() didn't work either, > it should have. Maybe the __asm macro is being optimized out. I verified that the unconditional invtlb() doesn't work. Better yet, replacing the invltlb_1pg() in the loop doesn't work. I think this means that we've changed the page tables too early for a page elsewhere. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.0002250740030.7691-100000>