search for: rw_enter

...s holding the lock, and false if there were no threads holding the lock. This way ASSERTs never failed). However, now there is a small bit of code that actually relies on RW_LOCK_HELD() working correctly: boolean_t need_lock = !RW_LOCK_HELD(&dp->dp_config_rwlock); if (need_lock) rw_enter(&dp->dp_config_rwlock, RW_READER); I can''t think of a way to emulate this functionality with pthreads without incurring a huge overhead when locking... Any ideas? Thanks, Ricardo -- <http://www.sun.com> *Ricardo Manuel Correia* Lustre Engineering *Sun Microsystems, I...

Hi, I think I found a bug in the rw_enter() implementation (emulation?) in libzpool, file /usr/src/lib/libzpool/common/kernel.c: void rw_enter(krwlock_t *rwlp, krw_t rw) { ASSERT(!RW_LOCK_HELD(rwlp)); ASSERT(rwlp->rw_owner != (void *)-1UL); ASSERT(rwlp->rw_owner != curthread); if (rw == RW_READER) (void) rw_rdlock(&rwlp-...

Hi. We''re testing the most recent ZFS version from OpenSolaris ported to FreeBSD. Kris (CCed) observed strange situation. In function arc_read() he had a panic on assertion that we try to unlock a lock which is not beeing held: rw_enter(&pbuf->b_hdr->b_datalock, RW_READER); err = arc_read_nolock(pio, spa, bp, done, private, priority, flags, arc_flags, zb); rw_exit(&pbuf->b_hdr->b_datalock); <--- THIS ONE The only possiblity was that b_hdr for pbuf was changed somewhere. We diagnozed this further an...

...39;ve been reading still more code :-). > > I notice in fasttrap_disable_callbacks(), there is this snippet of > code: > > for (cur = cpu->cpu_next_onln; cur != cpu; > cur = cur->cpu_next_onln) { > rw_enter(&cur->cpu_ft_lock, RW_WRITER); > } > > dtrace_pid_probe_ptr = NULL; > dtrace_return_probe_ptr = NULL; > > for (cur = cpu->cpu_next_onln; cur != cpu; > cur = cur->cpu_next_o...

Hi, Since almost all operations in the FUSE low-level API identify files by inode number, I''ve been using zfs_zget() to get the corresponding znode/vnode in order to call the corresponding VFS function in zfs_vnops.c. However, there are some cases when zfs_zget() behaves slightly different than I need: 1) If zp->z_unlinked != 0 then zfs_zget() returns ENOENT. I need it to return