Thank you for the clarification. I have a better understanding of this matter with help. Valdis Klētnieks <valdis.kletnieks@xxxxxx> 于2020年7月6日周一 上午2:58写道： > > On Sun, 05 Jul 2020 15:34:32 +0800, "e- d8 i> sunshilong" said: > > > There is "softlockup_tick()" function in the source code of > > linux-2.6.32(refer to > > https://elixir.bootlin.com/linux/v2.6.32.39/source/kernel/softlockup.c#L104), > > but what's the corresponding function in the linux-4.9 or later? > > There is not even a source code file named by softlockup.c in the > > linux-4.9 or later? > > 2.6.32 was a *long* time ago. Heck, even the BKL was still around at that point. > > [/usr/src/linux-next] git show v2.6.32 > tag v2.6.32 > Tagger: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > Date: Wed Dec 2 19:51:29 2009 -0800 > > and there were a *lot* of code changes from then until v4.9. > > [/usr/src/linux-next] git diff --shortstat v2.6.32..v4.9 > 59438 files changed, 14713566 insertions(+), 4896973 deletions(-) > > Even v4.9 is from long ago and far away, and of less and less relevance > each new Linux release. > > [/usr/src/linux-next] git diff --shortstat v4.9..HEAD > 73256 files changed, 11345968 insertions(+), 4464267 deletions(-) > > So.. since 2.6.32. there's been some 26 million new lines of code, which is an > interestingly high number considering that there's only 27 million lines of > code in the tree currently. > > In other words, essentially *everything* has been completely re-written and > re-designed since 2.6.32, and "What is the corresponding function" is a > question that is probably meaningless, because whatever you're looking for from > back then has almost certainly been completely re-written with a totally new > approach. > > Seriously - 2.6.32 is of interest only to software archaeologists. There is > nothing worth looking at in there that's relevant to today's code. > > But to answer your question: the entire kernel.softlockup.c file was removed in > v2.6.36 because it had been replaced by entirely new code. > _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
