Date: Wed, 12 Oct 2011 17:30:45 +0200 (CEST) From: Richard Kojedzinszky <krichy@tvnetwork.hu> To: freebsd-xen@freebsd.org Subject: kernel compilation Message-ID: <alpine.DEB.2.02.1110121414001.31539@krichy.tvnetwork.hu>
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[-- Attachment #1 --] Dear users, I've set up a freebsd 8.2 xen domU under debian squeeze, and have compiled a kernel with the attached config. The first compilation error is here, due to -Werror: # cc -c -O2 -pipe -fno-strict-aliasing -march=prescott -std=c99 -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual -Wundef -Wno-pointer-sign -fformat-extensions -nostdinc -I. -I/usr/src/sys -I/usr/src/sys/contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000 -mno-align-long-strings -mpreferred-stack-boundary=2 -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -ffreestanding -fstack-protector -Werror /usr/src/sys/i386/xen/xen_machdep.c cc1: warnings being treated as errors /usr/src/sys/i386/xen/xen_machdep.c:217: warning: 'xpq_queue_log' defined but not used Then for some reason I've chosen to add an #ifdef around the mentioned variable, and then the kernel compiled well, and worked well. Then I decided to strip more options from the kernel I dont use, so I removed SCTP from the config. Recompiled the kernel, and with that kernel, the domU crashes upon creation, nothing gets logged on the console. I would like to investigate this problem, why does removing an unreferenced variable make the kernel crash upon creation? But, unfortunately I cannot make my xen dom0 to make coredumps of the domains, for some reason only empty files get created under /var/xen/dump/. Do someone have experience with this? Anyway, I am trying to use freebsd as a xen PV domU, as in my experience a PV domU can be much faster than a HVM domU. Is it true? Regards, Kojedzinszky Richard TvNetWork Nyrt. E-mail: krichy (at) tvnetwork [dot] hu PGP: 0x54B2BF0C8F59B1B7 Fingerprint = F6D4 3FFE AF03 CACF 0DCB 46A1 54B2 BF0C 8F59 B1B7 [-- Attachment #2 --] # # XEN -- Kernel configuration for i386 XEN DomU # # $FreeBSD: src/sys/i386/conf/XEN,v 1.9.2.2.2.1 2010/12/21 17:09:25 kensmith Exp $ cpu I686_CPU ident XI #makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols makeoptions MODULES_OVERRIDE="" #options SCHED_4BSD options SCHED_ULE # ULE scheduler #options PREEMPTION # Enable kernel thread preemption options INET # InterNETworking options INET6 # IPv6 communications protocols options SCTP # Stream Control Transmission Protocol options FFS # Berkeley Fast Filesystem options SOFTUPDATES # Enable FFS soft updates support #options UFS_ACL # Support for access control lists options UFS_DIRHASH # Improve performance on big directories options NULLFS #options UFS_GJOURNAL # Enable gjournal-based UFS journaling #options NFSCLIENT # Network Filesystem Client #options NFSSERVER # Network Filesystem Server #options NFSLOCKD # Network Lock Manager #options NFS_ROOT # NFS usable as /, requires NFSCLIENT #options MSDOSFS # MSDOS Filesystem #options CD9660 # ISO 9660 Filesystem options PROCFS # Process filesystem (requires PSEUDOFS) options PSEUDOFS # Pseudo-filesystem framework options GEOM_PART_GPT # GUID Partition Tables. options GEOM_LABEL # Provides labelization #options COMPAT_43TTY # BSD 4.3 TTY compat (sgtty) #options COMPAT_FREEBSD4 # Compatible with FreeBSD4 #options COMPAT_FREEBSD5 # Compatible with FreeBSD5 #options COMPAT_FREEBSD6 # Compatible with FreeBSD6 #options COMPAT_FREEBSD7 # Compatible with FreeBSD7 #options KTRACE # ktrace(1) support #options STACK # stack(9) support options SYSVSHM # SYSV-style shared memory options SYSVMSG # SYSV-style message queues options SYSVSEM # SYSV-style semaphores options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions options KBD_INSTALL_CDEV # install a CDEV entry in /dev options AUDIT # Security event auditing # Debugging for use in -current #options KDB # Enable kernel debugger support. #options DDB # Support DDB. #options GDB # Support remote GDB. #options INVARIANTS # Enable calls of extra sanity checking #options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS #options WITNESS # Enable checks to detect deadlocks and cycles #options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed options PAE nooption NATIVE option XEN nodevice atpic nodevice isa options MCLSHIFT=12 # To make an SMP kernel, the next two lines are needed #options SMP # Symmetric MultiProcessor Kernel #device apic # I/O APIC device pci # Pseudo devices. device loop # Network loopback device random # Entropy device device ether # Ethernet support #device tun # Packet tunnel. device pty # Pseudo-ttys (telnet etc) device md # Memory "disks" #device gif # IPv6 and IPv4 tunneling #device faith # IPv6-to-IPv4 relaying (translation) # The `bpf' device enables the Berkeley Packet Filter. # Be aware of the administrative consequences of enabling this! # Note that 'bpf' is required for DHCP. device bpf # Berkeley packet filter device pf device pflog options MAC options MAC_BIBA
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