latency优化 + readme修改

src/hook/zvfs_hook_fd.c

@@ -19,96 +19,7 @@
 #include <pthread.h>
 #include <stdio.h>
 
-/* ------------------------------------------------------------------ */
-/* 内部：open/openat 调试日志                                            */
-/* ------------------------------------------------------------------ */
-
-static inline const char *
-zvfs_dbg_str(const char *s)
-{
-    return s ? s : "(null)";
-}
-
-static int
-zvfs_debug_open_enabled(void)
-{
-    static int inited = 0;
-    static int enabled = 0;
-    const char *v;
-
-    if (!inited) {
-        v = getenv("ZVFS_DEBUG_OPEN");
-        enabled = (v && v[0] != '\0' && strcmp(v, "0") != 0);
-        inited = 1;
-    }
-    return enabled;
-}
-
-static const char *
-zvfs_debug_open_match(void)
-{
-    static int inited = 0;
-    static const char *match = NULL;
-
-    if (!inited) {
-        match = getenv("ZVFS_DEBUG_OPEN_MATCH");
-        if (match && match[0] == '\0') {
-            match = NULL;
-        }
-        inited = 1;
-    }
-    return match;
-}
-
-static int
-zvfs_debug_open_should_log(const char *path1, const char *path2)
-{
-    const char *match;
-
-    if (!zvfs_debug_open_enabled()) {
-        return 0;
-    }
-
-    match = zvfs_debug_open_match();
-    if (!match) {
-        return 1;
-    }
-
-    if (path1 && strstr(path1, match)) {
-        return 1;
-    }
-    if (path2 && strstr(path2, match)) {
-        return 1;
-    }
-    return 0;
-}
-
-static void
-zvfs_debug_open_log(const char *path1, const char *path2, const char *fmt, ...)
-{
-    va_list ap;
-
-    if (!zvfs_debug_open_should_log(path1, path2)) {
-        return;
-    }
-
-    fprintf(stderr, "[zvfs][open-dbg][pid=%d][tid=%lu] ",
-            getpid(), (unsigned long)pthread_self());
-    va_start(ap, fmt);
-    vfprintf(stderr, fmt, ap);
-    va_end(ap);
-    fputc('\n', stderr);
-}
-
-static int
-zvfs_debug_has_fd_mapping(int fd)
-{
-    int found = 0;
-    pthread_mutex_lock(&g_fs.fd_mu);
-    found = (openfile_lookup(fd) != NULL);
-    pthread_mutex_unlock(&g_fs.fd_mu);
-    return found;
-}
+#define zvfs_debug_open_log(...) ((void)0)
 
 /* close 路径辅助：在文件后半段实现。 */
 static int zvfs_detach_fd_mapping(int fd, int do_sync_md);
@@ -393,10 +304,6 @@ zvfs_open_impl(int real_fd, const char *abspath, int flags, mode_t mode)
             /* 未命中：从 xattr 读 blob_id，可能是进程首次 open */
             if (zvfs_xattr_read_blob_id(real_fd, &blob_id) < 0) {
                 /* xattr 不存在：不是 zvfs 管理的文件，降级透传 */
-                int saved = errno;
-                zvfs_debug_open_log(abspath, NULL,
-                                    "open existing xattr_read miss errno=%d(%s), passthrough real_fd=%d",
-                                    saved, strerror(saved), real_fd);
                 return real_fd;   /* 直接返回，不做任何包装 */
             }
             zvfs_debug_open_log(abspath, NULL,