On Fri, Sep 12, 2014 at 12:23 PM, Zdenek Kaspar <zkaspar82@xxxxxxxxx> wrote: > Hello everyone, got this specific problem with RHEL5 guest under KVM > hypervisor. > > client/server kernel version: 3.16.2 > > /etc/exports: rw,async,no_subtree_check,no_root_squash > /proc/mounts: nfs4 rw,relatime,vers=4.0,rsize=524288,wsize=524288, > namlen=255,hard,proto=tcp,port=0, > timeo=600,retrans=2,sec=sys,clientaddr=xxx.xxx.xxx.xxx, > local_lock=none,addr=xxx.xxx.xxx.yyy 0 0 > > CONFIG_NFS_FS=m > # CONFIG_NFS_V2 is not set > CONFIG_NFS_V3=m > # CONFIG_NFS_V3_ACL is not set > CONFIG_NFS_V4=m > # CONFIG_NFS_SWAP is not set > # CONFIG_NFS_V4_1 is not set > # CONFIG_NFS_USE_LEGACY_DNS is not set > CONFIG_NFS_USE_KERNEL_DNS=y > CONFIG_NFSD=m > CONFIG_NFSD_V3=y > # CONFIG_NFSD_V3_ACL is not set > CONFIG_NFSD_V4=y > # CONFIG_NFSD_FAULT_INJECTION is not set > CONFIG_NFS_COMMON=y > > CentOS-5.10-i386-bin-1of8.iso -- did not test everything on centos, > behaved same as RHEL5. So let's use it as VM reproducer: > > dd if=/dev/zero of=kvm-test1.img bs=1M count=2048 > > start VM using: > file=kvm-test1.img,cache=writeback,aio=native,if=virtio,boot=on > > create custom layout: /dev/vda1 / ext3 max size primary > unselect Desktop-Gnome, select Customize now > use only: Base System/Base and install it.. > > [root@test1 ~]# find / >/dev/null > everything works as expected with writeback > > shutdown, backup kvm-test1.img (fs will explode) > start VM using: > file=kvm-test1.img,cache=none,aio=native,if=virtio,boot=on > > [root@test1 ~]# find / >/dev/null > and check dmesg, reboot etc, ie: > EXT3-fs error (device vda1): htree_dirblock_to_tree: bad entry in > directory #460317: rec_len is smaller than minimal - offset=0, inode=0, > rec_len=0, name_len=0 > EXT3-fs error (device vda1): htree_dirblock_to_tree: bad entry in > directory #98503: rec_len is smaller than minimal - offset=0, inode=0, > rec_len=0, name_len=0 > > Tested locally on ext4, xfs - WORK > Tested on NFSv4 share with ext4, xfs - FAIL > Tested NFSv4 share sync, async - FAIL > Tested on NFSv3 share with xfs - WORK > KVM with qemu rhel-6.5, 2.1.1 - SAME RESULTS > > NOTE: it seems just the rhel5 guest triggers it easily.. > > HTH, Z. > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html Don't use 3.16.x kernels with NFS yet. There are known bugs in the read/write code that need a stable backport of a set of fixes that are in 3.17-rc. -- Trond Myklebust Linux NFS client maintainer, PrimaryData trond.myklebust@xxxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
