On Wed, 04 Dec 2013 14:00:09 +0530 Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx> wrote: > > I don't recall the rationale for the current code and of course we > > didn't document it. It might be in the changelogs somewhere - could > > you please do the git digging and see if you can find out? > > Unfaortunately, from my search, I saw that the code belonged to pre git > time, so could not get much information on that. Here: https://lkml.org/lkml/2004/8/20/242 It seems it was done as a rather thoughtless performance optimisation. I'd say it's time to reimplement max_sane_readahead() from scratch. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>