On Mon, Sep 12, 2016 at 4:32 PM, Konstantin Belousov <kostik...@gmail.com> wrote: > On Mon, Sep 12, 2016 at 04:57:58AM +0000, Sepherosa Ziehau wrote: >> Author: sephe >> Date: Mon Sep 12 04:57:58 2016 >> New Revision: 305722 >> URL: https://svnweb.freebsd.org/changeset/base/305722 >> >> Log: >> x86: Use sx lock for interrupt sources. >> >> - Certain pic_assign_cpu, e.g. msi_assign_cpu can have quite a long >> call chain. For msi_assign_cpu, mutex makes complex PCI bridge >> drivers more tricky, e.g. sleep can note be called, etc, it will >> be pretty tricky for upcoming Hyper-V PCI bridge driver for PCI >> pass-through. > >> - It is not used on any hot code path nor non-sleepable context, so >> sx should have the same effect as mutex. > Did you tested ACPI_DMAR interrupt remapping mode with your patch and > witness enabled ?
Nope, I am about to try it now. BTW, I just checked the code for ACPI_DMAR, I didn't see anything obviously w/ the lock type change though. Thanks, sephe -- Tomorrow Will Never Die _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
