Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Wed, 14 Jan 2015 23:33:15 -0500
From: Rich Felker <>
Subject: First draft of new synccall, seems to be working

I just wrote the first draft of the new __synccall, used for
multithreaded set*id(). All the concepts seem sound and seem to be
working. It's missing the code to block creation of unboundedly more
threads while __synccall is running, but otherwise everything's in
place. Both the /proc/self/task processing logic and the PI futex
logic seem to be working as expected. I haven't yet tested in the
presence of multiple realtime priorities where there's a risk of some
threads never getting a chance to run; I need a framework with a
high-RT-prio supervisor process to kill the test if it runs too long,
because I don't want to be rebooting boxes over and over to test. :)

Attached is the current draft of the code, as a source file rather
than a patch since the whole file is basically rewritten. Comments


View attachment "synccall.c" of type "text/plain" (3768 bytes)

Powered by blists - more mailing lists

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.