Date: Tue, 4 Jul 2000 14:29:20 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Kevin Bracey <kevin.bracey@pace.co.uk> Cc: freebsd-net@FreeBSD.ORG Subject: Race condition in TCP connection drops? Message-ID: <200007041829.OAA22401@khavrinen.lcs.mit.edu> In-Reply-To: <282ed4d849%kbracey@kbracey.cam.pace.co.uk> References: <282ed4d849%kbracey@kbracey.cam.pace.co.uk>
next in thread | previous in thread | raw e-mail | index | archive | help
<<On Tue, 04 Jul 2000 13:52:47 +0100, Kevin Bracey <kevin.bracey@pace.co.uk> said: > This is totally reliable on our system, because the psignal mechanism is > synchronous. Are there interlocks to prevent this happening on FreeBSD, or is > it a race condition? On all BSD systems since time immemorial (and probably Bell Labs Unix before that), signal delivery is asynchronous, and the kernel is non-preemptible, so this is not possible. (There are no explicit interlocks /per se/; it's merely the consequence of a design choice made many years ago.) -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200007041829.OAA22401>