Date: Wed, 28 Nov 2018 23:33:06 -0500 From: Garrett Wollman <wollman@bimajority.org> To: Mark Johnston <markj@freebsd.org> Cc: Konstantin Belousov <kostikbel@gmail.com>, freebsd-stable@freebsd.org Subject: Re: Trap 12 in vm_page_alloc_after() Message-ID: <23551.27650.73879.929594@hergotha.csail.mit.edu> In-Reply-To: <20181129001904.GA63393@raichu> References: <23538.4310.710700.401331@hergotha.csail.mit.edu> <20181119050944.GW2378@kib.kiev.ua> <23547.30738.149260.454185@hergotha.csail.mit.edu> <20181129001904.GA63393@raichu>
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<<On Wed, 28 Nov 2018 19:19:04 -0500, Mark Johnston <markj@freebsd.org> said: > If you're using a Skylake, I suspect that you can set the > hw.skz63_enable tunable to 0 as a workaround, assuming you're not using > any code that relies on Intel TSX. (I don't think there's anything in > the base system that does.) There are some details in > https://reviews.freebsd.org/D18374 It is definitely a Skylake (although it took searching to find that out, since we don't identify processors by Intel codename). I've set that tunable, but I won't know whether it helps until the next (scheduled or unscheduled) reboot. -GAWollman
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