On 12/12/17 3:09 PM, Eugene Grosbein wrote: > On 13.12.2017 02:32, John Baldwin wrote: > >> Certainly for MIPS I have found that compiling with clang >> instead of gcc for mips64 gives a kernel that panics for stack overflow for >> any >> use of NFS. It might be that this is due to something MIPS-specific, but it >> might be worthwhile retesting with kstack_pages=2 and building the kernel >> with CROSS_TOOLCHAIN=i386-gcc after installing the appropriate package. > > You may want to check NFS code that uses stack heavily. > Here are numbers for i386 (bytes-on-stack, module, what function): > > 1344 nfs_nfsdport.o <nfssvc_nfsd>: > 1152 nfs_nfsdserv.o <nfsrvd_lockt>: > 1128 nfs_nfsdserv.o <nfsrvd_lock>: > 952 nfs_nfsdserv.o <nfsrvd_rename>: > 664 nfs_nfsdserv.o <nfsrvd_open>: > 640 nfs_nfsdserv.o <nfsrvd_link>: > 624 nfs_nfsdserv.o <nfsrvd_create>: > 608 nfs_nfsdserv.o <nfsrvd_mknod>: > 600 nfs_clvfsops.o <nfs_mount>:
My point is that you should compare gcc with clang as 10.x switched to clang and that may be a factor in the stack overflows beginning with 10.x. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
