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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2022/04/03 20:51:48 UTC
[GitHub] [incubator-nuttx] pkarashchenko opened a new issue, #5973: CONFIG_NET_TCP_WRITE_BUFFERS=y lead to deadlock
pkarashchenko opened a new issue, #5973:
URL: https://github.com/apache/incubator-nuttx/issues/5973
Recently I've been testing FTPD operation on custom SAME70 based board with FileZilla FTP client. I had `CONFIG_NET_TCP_WRITE_BUFFERS=y`. I have a folder with 2 files that I try to upload from laptop to device. Upload of a folder fails. FileZilla starts 2 FTP sessions in parallel one for each file upload so 2 instances of `ftpd_worker` are started. The situation happens in 80% of my tests. The FTP client send `"STOR"` command for both files and by adding extra logs I see that both threads reach `ftpd.c:1908` code `ret = ftpd_response(session->cmd.sd, session->txtimeout, g_respfmt1, 150, ' ', "Opening data connection");` at the same time so `send` is called concurrently. The logs before `ftpd_response` call are printed, but there are no logs after `ftpd_response` call. NSH "ps" shows that both threads are "waiting for semaphore", but most probably loop somewhere inside the `psock_tcp_send` trying to allocate `iob`. Setting `CONFIG_NET_TCP_WRITE_BUFFERS=n` solves the issue and FTP s
erver operates as expected.
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[GitHub] [nuttx] anchao commented on issue #5973: CONFIG_NET_TCP_WRITE_BUFFERS=y lead to deadlock
Posted by "anchao (via GitHub)" <gi...@apache.org>.
anchao commented on issue #5973:
URL: https://github.com/apache/nuttx/issues/5973#issuecomment-1408116876
Does this issue still exist on the latest nuttx? recently I fixed a similar issue, I don’t know if there is any improvement for ftpd
https://github.com/apache/nuttx/pull/8130
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[GitHub] [nuttx] fjpanag commented on issue #5973: CONFIG_NET_TCP_WRITE_BUFFERS=y lead to deadlock
Posted by GitBox <gi...@apache.org>.
fjpanag commented on issue #5973:
URL: https://github.com/apache/nuttx/issues/5973#issuecomment-1328047885
I am hitting the exact same issue with a custom server, on high load.
TCP deadlocks during send when it tries to allocate an iob.
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