max number of slabs per kernel module (kernel 2.6.17, suse) Post: 302160832

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Operating Systems Linux SuSE max number of slabs per kernel module (kernel 2.6.17, suse) Post 302160832 by Perderabo on Tuesday 22nd of January 2008 10:19:41 PM

01-22-2008

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Not sure I follow you... more efficient than what? It sounds like you're still trying to compare slabs to zones. (That's like comparing TCP to ethernet.) But yes, slabs are efficient and tend to result in less fragmentation. However that "unused pages..." comment is off the mark. A freed slab tends to stay in its cache ready to be allocated again. Please read the book...I don't want to type the whole thing in. When you do, skip to page 329 "Interfacing the Slab Allocator with the Zoned Page Frame Allocator".

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moduload

moduload(2)							System Calls Manual						       moduload(2)

NAME

       moduload - unload a kernel module on demand

SYNOPSIS

DESCRIPTION

       allows processes with appropriate privilege to demand unload one or all unloadable modules from the running kernel.  A module is considered
       unloadable if it is not currently in use, if no module depending on it is currently loaded, and if  the	module	is  not  being	loaded	or
       unloaded  from  the  kernel.   If module_id is set to 0 (zero), attempts to unload all unloadable modules, otherwise attempts to unload the
       module specified by module_id.

   Notes
       is currently implemented as a macro.

   Security Restrictions
       is restricted to superuser processes or privileged processes.  A privileged process requires the privilege to execute the system call.

       See privileges(5), for more information about the privilege.

RETURN VALUE

       On success, returns 0, otherwise it returns -1 and sets to indicate the error.

ERRORS

       fails if one or more of the following are true:

	      module_id     does not correspond to any valid currently loaded kernel module.

	      The caller is not a superuser process or a privileged process.

	      There are outstanding references to the module, or modules that depend
			    on this module are currently loaded, or profiling is enabled, or the module is in  the  process  of  being	loaded	or
			    unloaded from the kernel.

	      The Dynamically Loadable Kernel Module feature is not initialized.

SEE ALSO

       kcmodule(1M), modload(2), privileges(5).

																       moduload(2)