On Tue, 19 Dec 2017, Alexandru Chirvasitu wrote: > I had never heard of 'bisect' before this casual mention (you might tell > I am a bit out of my depth). I've since applied it to Linus' tree between > bebc608 Linux 4.14 (good) > > and > > 4fbd8d1 Linux 4.15-rc1 (bad) Is Linus current head 4.15-rc4 bad as well? > It took about 13 attempts (I had access to a faster machine to compile > on, and ccache helped once the cache built up some momentum). The result > is (as presented by 'git bisect' at the end of the process, between the > --- dividers added by me for clarity): > --- start of output --- > > 2b5175c4fa974b6aa05bbd2ee8d443a8036a1714 is the first bad commit > commit 2b5175c4fa974b6aa05bbd2ee8d443a8036a1714 > Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Date: Tue Oct 17 09:54:57 2017 +0200 > > genirq: Add config option for reservation mode > > The interrupt reservation mode requires reactivation of PCI/MSI > interrupts. Create a config option, so the PCI code can set the > corresponding flag when required. > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Cc: Josh Poulson <jopoulso@xxxxxxxxxxxxx> > Cc: Mihai Costache <v-micos@xxxxxxxxxxxxx> > Cc: Stephen Hemminger <sthemmin@xxxxxxxxxxxxx> > Cc: Marc Zyngier <marc.zyngier@xxxxxxx> > Cc: linux-pci@xxxxxxxxxxxxxxx > Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> > Cc: Dexuan Cui <decui@xxxxxxxxxxxxx> > Cc: Simon Xiao <sixiao@xxxxxxxxxxxxx> > Cc: Saeed Mahameed <saeedm@xxxxxxxxxxxx> > Cc: Jork Loeser <Jork.Loeser@xxxxxxxxxxxxx> > Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > Cc: devel@xxxxxxxxxxxxxxxxxxxxxx > Cc: KY Srinivasan <kys@xxxxxxxxxxxxx> > Link: https://lkml.kernel.org/r/20171017075600.369375409@xxxxxxxxxxxxx > > :040000 040000 5e73031cc0c8411a20722cce7876ab7b82ed3858 dcf98e7a6b7d5f7c5353b7ccab02125e6d332ec8 M kernel > > --- end of output --- > > Consequently, I am cc-ing in the listed addresses. Thanks for doing that bisect, but unfortunately this commit cannot be the problematic one, It merily adds a config symbol, but it does not change any code at all. It has no effect whatsoever. So something might have gone wrong in your bisecting. I CC'ed Dou Liyang. He has changed the early APIC setup code and there has been an issue reported already. Though I lost track of that. Dou, any pointers? Thanks, tglx _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
