search for: zfs_znode_cach

...4 0 dnode_t 388 1529 84090 34443264 157309 0 arc_buf_hdr_t 92 13276 26460 2580480 140047 0 arc_buf_t 20 957 5915 143360 225786 0 zil_lwb_cache 184 3 44 8192 149 0 zfs_znode_cache 104 1226 83460 8765440 142715 0 ... Note that the dmu_buf_impl_t, dnode_t and zfs_znode_cache kmem_caches are sitting on 98% of unused memory. Although the arc_reclaim_thread is detecting a kmem heap shortage all the time and is reducing the zio_buf_* and arc_buf_* cach...

...nism. I can register my function so it will be called when there are memory problems, which I do. I using it for ARC layer. Even with this in place under heavy load the kernel panics, because memory with KM_SLEEP cannot be allocated. Here are some statistics of memory usage when the panic occurs: zfs_znode_cache: 356 * 11547 = 4110732 bytes zil_lwb_cache: 176 * 43 = 7568 bytes arc_buf_t: 20 * 7060 = 141200 bytes arc_buf_hdr_t: 188 * 7060 = 1327280 bytes dnode_t: 756 * 162311 = 122707116 bytes !! dmu_buf_impl_t: 332 * 18649 = 6191468 other: 14432256 bytes (regular kmem_alloc()...