- max_pages = cli->cl_max_pages_per_rpc * cli->cl_max_rpcs_in_flight;
- if (npages > max_pages)
- npages = max_pages;
-
- c = atomic_long_read(cli->cl_lru_left);
- if (c < npages && osc_lru_reclaim(cli, npages) > 0)
- c = atomic_long_read(cli->cl_lru_left);
- while (c >= npages) {
- if (c == atomic_long_cmpxchg(cli->cl_lru_left, c, c - npages)) {
- oio->oi_lru_reserved = npages;
- break;
- }
- c = atomic_long_read(cli->cl_lru_left);
- }
- if (atomic_long_read(cli->cl_lru_left) < max_pages) {
- /* If there aren't enough pages in the per-OSC LRU then
- * wake up the LRU thread to try and clear out space, so
- * we don't block if pages are being dirtied quickly. */
- CDEBUG(D_CACHE, "%s: queue LRU, left: %lu/%ld.\n",
- cli_name(cli), atomic_long_read(cli->cl_lru_left),
- max_pages);
- (void)ptlrpcd_queue_work(cli->cl_lru_work);
- }