| Message ID | 20230628152726.110295-4-bmeng@tinylab.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | net/tap: Fix QEMU frozen issue when the maximum number of file descriptors is very large | expand |
diff --git a/util/async-teardown.c b/util/async-teardown.c index 3ab19c8740..7e0177a8da 100644 --- a/util/async-teardown.c +++ b/util/async-teardown.c @@ -48,7 +48,11 @@ static void close_all_open_fd(void) dir = opendir("/proc/self/fd"); if (!dir) { - /* If /proc is not mounted, there is nothing that can be done. */ + /* If /proc is not mounted, close fds one by one. */ + int open_max = sysconf(_SC_OPEN_MAX), i; + for (i = 0; i < open_max; i++) { + close(i); + } return; } /* Avoid closing the directory. */
When opening /proc/self/fd fails, current codes just return directly, but we can fall back to close fds one by one. Signed-off-by: Bin Meng <bmeng@tinylab.org> --- - feel free to drop this patch if it does not make too much sense (no changes since v2) Changes in v2: - new patch: "util/async-teardown: Fall back to close fds one by one" util/async-teardown.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)