On Thu, Aug 05, 2010 at 04:46:12PM -0400, J. Bruce Fields wrote: > On Thu, Aug 05, 2010 at 10:10:16AM +0900, Tetsuo Handa wrote: > > J. Bruce Fields wrote: > > > Maybe figuring out exactly hwere that is would help work out what's > > > going on. Doing > > > > > > make net/sunrpc/svc.lst > > > > > > then looking for c1356dd4 (or just mailing me svc.lst) could help. > > > > "make net/sunrpc/svc.lst" failed due to following error. > > > > BFD: Dwarf Error: Abbrev offset (3238007024) greater than or equal to .debug_abbrev size (1607). > > > > Manual printk() debug reported that > > rqstp->rq_argp == rqstp->rq_resp == ZERO_SIZE_PTR and > > Huh. As far as I can tell that will only happen if you've not no nfsd > versions defined; how is that happening? OK, I think it's another startup-order problem: depending on how things are started up, sv_nrthreads may already be nonzero, causing us to skip nfsd_reset_versions(), so that the loop in __svc_create() ends up leaving xdrsize 0, and then the kmalloc's in svc_prepare_thread() assign ZERO_SIZE_PTR. I need to think a little more about what we should be doing here. --b. > > --b. > > > procp->pc_argsize == procp->pc_ressize == 4. > > > > --- linux-2.6.35-next.orig/net/sunrpc/svc.c > > +++ linux-2.6.35-next/net/sunrpc/svc.c > > @@ -1084,6 +1084,11 @@ svc_process_common(struct svc_rqst *rqst > > procp->pc_count++; > > > > /* Initialize storage for argp and resp */ > > + printk(KERN_INFO "rqstp=%p procp=%p\n", rqstp, procp); > > + printk(KERN_INFO "rqstp->rq_argp=%p procp->pc_argsize=%u\n", > > + rqstp->rq_argp, procp->pc_argsize); > > + printk(KERN_INFO "rqstp->rq_resp=%p procp->pc_ressize=%u\n", > > + rqstp->rq_resp, procp->pc_ressize); > > memset(rqstp->rq_argp, 0, procp->pc_argsize); > > memset(rqstp->rq_resp, 0, procp->pc_ressize); > > > > > > [ 37.669174] NET: Registered protocol family 10 > > [ 38.080725] svc: failed to register lockdv1 RPC service (errno 97). > > [ 122.895707] rqstp=dcb91000 procp=c154ca20 > > [ 122.896533] rqstp->rq_argp=00000010 procp->pc_argsize=4 > > [ 122.897484] rqstp->rq_resp=00000010 procp->pc_ressize=4 > > [ 122.898609] BUG: unable to handle kernel NULL pointer dereference at 00000010 > > [ 122.899964] IP: [<c1356e80>] svc_process_common+0x370/0x640 > > [ 122.900493] *pde = 00000000 > > [ 122.900493] Oops: 0002 [#1] SMP DEBUG_PAGEALLOC > > [ 122.923308] last sysfs file: /sys/devices/pci0000:00/0000:00:10.0/host0/target0:0:1/0:0:1:0/type > > [ 122.923308] Modules linked in: nfs ipv6 pcnet32 > > > > > OK, I wonder if Sarge didn't yet mount the nfsd filesystem on > > > /proc/fs/nfsd. > > > > According to /proc/mounts , the nfsd filesystem is not mounted on > > /proc/fs/nfsd . But mounting it manually before starting nfsd did not help. > > > > Regards. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
