Messages in this thread | | | Date | Mon, 23 Feb 2015 12:39:33 +0100 | From | Pavel Machek <> | Subject | Re: live kernel upgrades (was: live kernel patching design) |
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> More importantly, both kGraft and kpatch are pretty limited > in what kinds of updates they allow, and neither kGraft nor > kpatch has any clear path towards applying more complex > fixes to kernel images that I can see: kGraft can only > apply the simplest of fixes where both versions of a > function are interchangeable, and kpatch is only marginally > better at that - and that's pretty fundamental to both > projects! > > I think all of these problems could be resolved by shooting > for the moon instead: > > - work towards allowing arbitrary live kernel upgrades! > > not just 'live kernel patches'.
Note that live kernel upgrade would have interesting implications outside kernel:
1) glibc does "what kernel version is this?" caches result and alters behaviour accordingly.
2) apps will do recently_introduced_syscall(), get error and not attempt it again.
Pavel
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