preread_bufs      119 event/ngx_event_pipe.c         if (p->preread_bufs == NULL && !p->upstream->read->ready) {
preread_bufs      123 event/ngx_event_pipe.c         if (p->preread_bufs) {
preread_bufs      127 event/ngx_event_pipe.c             chain = p->preread_bufs;
preread_bufs      128 event/ngx_event_pipe.c             p->preread_bufs = NULL;
preread_bufs       79 event/ngx_event_pipe.h     ngx_chain_t       *preread_bufs;
preread_bufs     2239 http/ngx_http_upstream.c     p->preread_bufs = ngx_alloc_chain_link(r->pool);
preread_bufs     2240 http/ngx_http_upstream.c     if (p->preread_bufs == NULL) {
preread_bufs     2245 http/ngx_http_upstream.c     p->preread_bufs->buf = &u->buffer;
preread_bufs     2246 http/ngx_http_upstream.c     p->preread_bufs->next = NULL;