>From: [email protected] 
>[mailto:[email protected]] On Behalf Of Mark P
>Sent: Thursday, April 16, 2015 8:12 AM
>To: Ruben Safir
>Cc: nick; [email protected]
>Subject: Re: Kernel thread scheduling
>
>I find that the free electrons LXR has the best search capabilities:
>
>http://lxr.free-electrons.com/source/include/linux/rbtree.h#L35
>-M

Those interested in kernel source browsers might want to check out the code 
browser available at https://scan.coverity.com.

Coverity does static code analysis and sells a product to do so, but they do 
regular scans of popular open source projects. Most of their focus is on 
finding and reporting defects, but the code browser they have created to do so 
is far beyond anything else I've found out there. Getting to it is a little 
awkward, you first need to sign up for an account (I got mine for free), then 
browse to the linux kernel project and select a defect to get into the browser. 
But once there, click the folder icon at the top left of the code window and 
select a source file. All of function names, variable names, structure names 
and structure field names are hyperlinks. Left click on one of them, click the 
little down arrow and select from the menu to list definitions, references, etc.

You do need to find a reference to the token in question using some other 
browser like LXR, Coverity's doesn't seem to have a search button for that, but 
once located the cross-referencing provided is better than what I've seen in 
other text matching browsers like LXR, cscope, etc. It's particular good when 
you are trying to understand how a given field of a structure is used. Say you 
want to find out how a structure field named "lock" in some structure named 
"foo" is referenced. Find the definition of struct foo, click on the lock field 
and list references. It will show all the references to struct foo's lock but 
NOT show the thousands of references to all of the other fields named "lock" in 
other structures. That is something no other browser does, at least none that I 
am aware of.

Jeff Haran

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