Messages in this thread | | | Date | Thu, 22 Jan 2015 08:44:19 +0800 | From | Li Bin <> | Subject | Re: [PATCH 1/2] livepatch: Revert "livepatch: enforce patch stacking semantics" |
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On 2015/1/21 22:36, Seth Jennings wrote: > On Wed, Jan 21, 2015 at 03:06:38PM +0100, Jiri Kosina wrote: >> On Wed, 21 Jan 2015, Li Bin wrote: >> >>> This reverts commit 83a90bb1345767f0cb96d242fd8b9db44b2b0e17. >>> >>> The method that only allowing the topmost patch on the stack to be >>> enabled or disabled is unreasonable. Such as the following case: >>> >>> - do live patch1 >>> - disable patch1 >>> - do live patch2 //error >>> >>> Now, we will never be able to do new live patch unless disabing the >>> patch1 although there is no dependencies. >> >> Unregistering disabled patch still works and removes it from the list no >> matter the position. >> >> So what exactly is the problem? > >>From a quick glance, it seems that what this set does is it only > enforces the stacking requirements if two patches patch the same > function. >
Yes, this patch is only concerning this case that 'multi patches patch the same function' and solve the problem that mentioned previously:
foo_unpatched() foo_patch1() foo_patch2() foo_patch3() disable(foo_patch2) disable(foo_patch3) foo_patch1()
foo_patch2 is not allowed to be disabled before disable foo_patch3.
Thanks, Li Bin
> I'm not sure if that is correct logically or correctly implemented by > these patches yet. > > Seth > >> >> -- >> Jiri Kosina >> SUSE Labs > > . >
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