Mailing List Archive

The following issue has been SUBMITTED.
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http://dbmail.org/mantis/view.php?id=1087
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Reported By: AndroSyn
Assigned To:
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Project: DBMail
Issue ID: 1087
Category: IMAP daemon
Reproducibility: always
Severity: major
Priority: normal
Status: new
target:
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Date Submitted: 22-Aug-17 20:47 CEST
Last Modified: 22-Aug-17 20:47 CEST
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Summary: When using TLS, the imapd will busy loop endlessly
with always write ready sockets
Description:

dbmail-imapd will spin with 100% cpu on its main thread due to unnecessary
EV_WRITE events being registered for SSL sockets. Since the sockets are
always ready, epoll and friends will always return a callback for them.

Another related issue to this is, sometimes SSL_write will return
SSL_WRITE_WANTS_READ. The correct way to handle this is to call
ci_write_cb from insted of the ci_read_cb handler. To tell when we need to
do this, I'm setting a bit in the client_state field to mark that we want
to read for a write first.

The attached patch seems to work for me.
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Issue History
Date Modified Username Field Change
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22-Aug-17 20:47 AndroSyn New Issue
22-Aug-17 20:47 AndroSyn File Added: dbmail-ssl-spinning.patch

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