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Operating Systems

Submission + - Removing the Big Kernel Lock (kerneltrap.org)

Corrado writes: "Over at Kernel Trap there is a big discussion going on over removing a bit of non-preemptable code from the Linux kernel.

"As some of the latency junkies on lkml already know, commit 8e3e076 in v2.6.26-rc2 removed the preemptible BKL feature and made the Big Kernel Lock a spinlock and thus turned it into non-preemptible code again. This commit returned the BKL code to the 2.6.7 state of affairs in essence," began Ingo Molnar. He noted that this had a very negative effect on the real time kernel efforts, adding that Linux creator Linus Torvalds indicated the only acceptable way forward was to completely remove the BKL."

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Removing the Big Kernel Lock

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