Messages in this thread | | | From | Michal Hocko <> | Subject | [DEBUG PATCH 0/2] debug explicit GFP_NO{FS,IO} usage from the scope context | Date | Fri, 6 Jan 2017 15:18:43 +0100 |
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These two patches should help to identify explicit GFP_NO{FS,IO} usage from withing a scope context and reduce such a usage as a result. Such a usage can be changed to the full GFP_KERNEL because all the calls from within the NO{FS,IO} scope will drop the __GFP_FS resp. __GFP_IO automatically and if the function is called outside of the scope then we do not need to restrict it to NOFS/NOIO as long as all the reclaim recursion unsafe contexts are marked properly. This means that each such a reported allocation site has to be checked before converted.
The debugging has to be enabled explicitly by a kernel command line parameter and then it reports the stack trace of the allocation and also the function which has started the current scope.
These two patches are _not_ intended to be merged and they are only aimed at debugging.
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