search for: dmu_buf_hold_array_by_dnod

...get the below: # dtrace -n profile-997''{@[stack()]=count();}'' [...] unix`default_lock_delay+0x48 unix`mutex_vector_enter+0x99 zfs`dmu_zfetch_find+0x1f9 zfs`dmu_zfetch+0xc9 zfs`dbuf_read+0x27a zfs`dmu_buf_hold_array_by_dnode+0x287 zfs`dmu_buf_hold_array+0x81 zfs`dmu_read_uio+0x49 zfs`zfs_read+0x15e zfs`zfs_shim_read+0xc genunix`fop_read+0x31 genunix`read+0x188 unix`sys_syscall+0x17b 1861 unix`m...

Hi list, since we activated 10gbe on ixgbe cards + jumbo frames(9k) on 9.0 and now on 9.1 we recognize that after a random period of time, sometimes a week, sometimes only a day, the system doesn't send any packets out. The phenomenon is that you can't login via ssh, nfs and istgt is not operative. Yet you can login on the console and execute commands. A clean shutdown isn't possible

I just had a quick play with gzip compression on a filesystem and the result was the machine grinding to a halt while copying some large (.wav) files to it from another filesystem in the same pool. The system became very unresponsive, taking several seconds to echo keystrokes. The box is a maxed out AMD QuadFX, so it should have plenty of grunt for this. Comments? Ian