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Date: Mon, 8 Jun 2015 17:26:16 +0300 From: Alexey Dobriyan <adobriyan@...il.com> To: Ingo Molnar <mingo@...nel.org> Cc: Linux Kernel <linux-kernel@...r.kernel.org>, lou_langholtz@...com, htejun@...il.com, Linus Torvalds <torvalds@...ux-foundation.org>, holler@...oftware.de Subject: Re: [PATCH] debug: Deprecate BUG_ON() use in new code, introduce CRASH_ON() Ingo Molnar wrote: > These days a BUG_ON() is almost always fatal due to unreleased locks, > plus we still don't print kernel crashes to the graphical console, > so they are silent hard lockups in 99% of the cases. Is it a regression? I've just tested with "echo c >/proc/sysrq-trigger" and kernel.panic_on_oops=1 and the box just hanged. But I clearly remember it started to work at some point and it was a miracle. Recently a colleague of mine show such graphical panic (most of it as always scrolled away BTW). It's usual setup with i915 driver, X and fbconsole which is never used. As for BUG_ON() I hope rule will be relaxed for "not under locks" situations and something will be done with inevitable miryads of trivial patches. Count them: $ chgrep -e BUG_ON -w -n | wc -l 9660 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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