New submission from Nir Soffer <nir...@gmail.com>: If the file descriptor is on a non-responsive NFS server, calling fstat() can block for long time, hanging all threads. Most of the fstat() calls release the GIL around the call, but some calls seems to be forgotten.
In python 3, the calls are handled now by _py_fstat(), releasing the GIL internally, but some calls use _py_fstat_noraise() which does not release the GIL. Most of the calls to _py_fstat_noraise() release the GIL around the call, except these 2 calls, affecting users of: - mmap.mmap() - os.urandom() - random.seed() In python there are more fstat() calls to fix, affecting users of: - imp.load_dynamic() - imp.load_source() - mmap.mmap() - mmapobject.size() - os.fdopen() - os.urandom() - random.seed() ---------- components: Library (Lib) messages: 313407 nosy: brett.cannon, eric.snow, ncoghlan, nirs, serhiy.storchaka, twouters, vstinner, yselivanov priority: normal severity: normal status: open title: Some fstat() calls do not release the GIL, possibly hanging all threads type: performance versions: Python 2.7, Python 3.6, Python 3.7, Python 3.8 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33021> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
