free_mem           47 http/modules/ngx_http_gzip_filter_module.c     char                *free_mem;
free_mem          602 http/modules/ngx_http_gzip_filter_module.c     ctx->free_mem = ctx->preallocated;
free_mem          977 http/modules/ngx_http_gzip_filter_module.c         p = ctx->free_mem;
free_mem          978 http/modules/ngx_http_gzip_filter_module.c         ctx->free_mem += alloc;