Let's say I want to know that slab.h is required to use kmalloc(). I search for kmalloc in the documentation and get this page https://www.kernel.org/doc/html/latest/core-api/mm-api.html?highlight=kmalloc#.
So I know it's related to memory management and "the slab cache", but I see no mention of slab.h.
What's the correct way of determining what header needs to be included in your module program ?
Get to know one of the Linux kernel cross-reference sites (LXR), which can tell you where things are defined.
i.e.:
https://elixir.bootlin.com/linux/latest/ident/kmalloc
Related
Say I use the DebugUtils object to set the name of a logical device, i.e. a vk::Device. How can I trigger a validation message involving the object to test that the name matches my expectation?
You need to forcefully do something that the validation layers pickup. E.g. creating a buffer with a wrong alignment or flags.
Another (better) option is to run your application through RenderDoc. It'll display debug names in the trace, so you can easily see if naming of e.g. the device worked properly. You can find all Vulkan resources in the "Resource Inspector":
I would like to achieve the following thing-
Build a pagetype which has 3 different ContentArea's and that the user can put only a specific block type in each of these areas.
For example - ContentArea1 can only accept block type of "BlockType1", ContentArea2 can only accept "BlockType2" and so on. (It doesn't need to be generic, I can specify hard coded which type should fit in each Content Area.
Is it possible to achieve?
Maybe there is another way?
(I know you can create a property with the block type, but I want to use the same block in different places)
ps: using EPI-SERVER 8
From version 8.0 of EPiServer there is better support for AllowedTypes.
The feature was also available before version 8, but was more limited.
In short, you decorate your ContentArea property with the AllowedTypes attribute and EPiServer takes care of the rest.
Read more about it here:
http://world.episerver.com/blogs/Ben-McKernan/Dates/2015/2/the-new-and-improved-allowed-types/
As the title suggests my question is pretty simple.
Is there a way to count the total number of active module instances of a specific type/kind in Joomla (with a specific module name)?
I know how to count modules in a specific module position using JModuleHelper::getModules, but that is not what I want.
I simply need to count all active modules instances of a specific type/kind.
Does anyone know how to do this (without having to do a manual MySQL query)?
I do not know if there is an official joomla way, but you can do it by having an sql query looking at
#__modules
table.
Check out this table and you will find out how easy it is.
An example sql would be:
select count(id) from #__modules where module = 'mod_login'
As far as i know there is no joomla method for this. I would recommend (if it has to be done) either
using a crawler to go through all pages of the site counting the instances.
or using a script which goes through the template php files and the database to find all active instances.
Both these methods might not be 100% reliable due to unexpected circumstances (like module being included in article or module included only after a button is clicked on) but could work if you know your site well enough.
Unfortunately there does not seem to be such a function in Joomla.
In my case I needed this to tell me whether or not a instances of this module was > 0 or not.. and my alternative solution was to simply make a module-specific function and then in the module php file check if function is already loaded.
I found the DiskVolumeInfo property -- I'd like to use it to get some disk information in a clustered setup.
http://msdn.microsoft.com/en-us/library/windows/desktop/bb309235(v=vs.85).aspx
The problem is I have no idea what technology is required to get this data. This doesn't resemble the standard C/C++/C#/VB format of function/method reference.
Question: How do I get the DiskVolumeInfo data?
Ideally I could write the binary output directly to a file, say data.bin.
Any ideas would be helpful, thanks.
The process for getting object properties is described here.
Looks like you need to call the ClusterResourceControl function with a handle to the physical disk resource and the CLUSCTL_RESOURCE_GET_PRIVATE_PROPERTIES control code. You can then use ResUtilFindBinaryProperty to extract the DiskVolumeInfo property from the property list returned.
For anyone still interested:
As given here CLUSCTL_RESOURCE_STORAGE_GET_DISK_INFO_EX is a better way to do this.
How do I use the partial dependency caching in Kentico CMS?
Here's a very common example need I have but can't figure how to set up partial caching with dependencies correctly (in Portal mode, though I think this should apply to the other development modes too):
/Home (with a Repeater)
/News
Item 1 (so path = /News/Item-1)
Item 2 (so path = /News/Item-2)
The Home page has a Repeater web part that lists the most recent news items. It has a Path of "/%" and Document Types filter set to "CMS.News"; obviously also a "Partial cache minutes" value > 0. There is no custom code; just Portal web parts and standard document types.
What is the exact "Partial cache dependencies" string I should use so that when a third news item it is immediately reflected on the Home page, but otherwise uses the cache?
Kentico did release several blog posts including Deep dive: Cache dependencies, but I'm having difficulty applying the theory discussed there to a site. I even asked in comments there some questions, but the answers by the Kentico support there weren't really helpful.
From what I could tell in that post, they said to use node|%CurrentSite.SiteName%}|/News|childnodes which seems to have some magic keywords like node and some macro elements like {%CurrentSite.SiteName%}. (I know that all items need to be lowercase, so already I know their advice isn't real consistent. It should at least be node|%CurrentSite.SiteName%}|/news|childnodes instead. And do I need to force lowercase on the macros?) First of all, that string didn't work for me--it was still caching the Home page Top News repeater (yes, full page caching was turned off); second, how do I build a string like that and debug what it should be? The linked post does have a grid of examples, but it is confusing (to me) and not exhaustive.
Can anyone provide a good example or better blog post reference anywhere that explains this in another way?
EDIT: I realized I asked this question fairly broadly. How about if we narrow it to just answer the question: How do I determine what settings to use to cache a repeater with a dependency to changes in another folder?
The magic words you mentioned in your post are basically the keywords for particular objects. You can see them listed in the caching options description - the "node", "nodes", "nodeid" are listed there as most common for working with nodes. But below then is described the syntax for any object, where you will use that object class name.
Regarding the blog post from the Kentico's CTO and his answers in the comments, it looks like he overlooked or misunderstood your question. you are talking about partial caching and he was giving you examples on the "normal" caching settings. Macros in the touch keys are resolved (lower case or upper case does not matter) in all other caching settings but not in the partial caching. This feature will be available in the upcoming version 6.0.
So, right now you have to hard-code the site name in the touch key cache setting.
I turned on the cache debugging and looked at what cache names were being generated. I saw mine being set to...
node|{%CurrentSite.SiteName%}|/test-section/|childnodes
...which was obviously incorrect and would never work!
It looks like macros do not get resolved within the Partial Cache Dependencies property. So you can't use "{%CurrentSite.SiteName%}" in place of the site name. Here is an example of a partial cache dependency that worked for me...
node|mytestsite|/test-section/|childnodes
Using the above partial cache dependecy, the cache was refreshed as soon as I deleted a sub-item.