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Default branch: MAIN
Current tag: nick-nhusb-base-20161204
Revision 1.75 / (download) - annotate - [select for diffs], Fri Nov 18 06:50:04 2016 UTC (10 months ago) by knakahara
CVS Tags: pgoyette-localcount-20170107, nick-nhusb-base-20161204
Changes since 1.74: +7 -2 lines
Diff to previous 1.74 (colored)
fix: "ifconfig destory" can stalls when "ifconfig" is done parallel. This problem occurs only if NET_MPSAFE on. ifconfig destroy side: kernel entry point is ifioctl => if_clone_destroy. pr_purgeif() acquires softnet_lock, and then ifa_remove() calls pserialize_perform() holding softnet_lock. ifconfig side: kernel entry point is socreate. pr_attach()(udp_attach_wrapper()) calls sosetlock(). In this call path, sosetlock() try to acquire softnet_lock. These can cause dead lock.
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