Messages in this thread | | | Date | Wed, 1 Aug 2007 21:03:50 -0600 | From | Matthew Wilcox <> | Subject | Re: [PATCH] Fix two potential mem leaks in MPT Fusion (mpt_attach()) |
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On Wed, Aug 01, 2007 at 05:26:53PM -0700, Andrew Morton wrote: > Why on earth is that using GFP_ATOMIC? This function later goes on to > create procfs files and such things.
Seems fairly common in driver initialisation code. I removed three instances of this in the advansys driver.
> y'know, we could have a debug option which will spit warnings if someone > does a !__GFP_WAIT allocation while !in_atomic() (only works if > CONFIG_PREEMPT). > > But please, make it depend on !CONFIG_AKPM. I shudder to think about all > the stuff it would pick up.
Seems like you'd get a lot of false positives. How about a call:
slab_warn_about_atomic_allocs();
right before calling the initcalls, and then
slab_stop_warning_about_atomic_allocs();
after calling them? That should give people a lot to chew on for a few months. Obviously, you would need to not warn about allocations from interrupt context, as you say above.
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