On Thursday 17 March 2005 12:44, aq wrote: > hello, > > I am writing a kernel module, and in one function i have a small array > of char. I declare it like this: > > char arr[PAGE_SIZE]; That is hardly small. It is a major percentage of the total stack size. > But knowing that the kernel stack size is rather limited, I am afraid > that the above array wastes too much stack memory. So I would like to > know what is the recommended size for a variable on the stack? Very very small. Even for arrays/structs that are only a few words long, you may want to at least consider dynamically allocating them instead. Just because they are small today, doesn't mean they'll stay that small next week/month/year. > Should > I allocate the above array using kmalloc() instead of putting it on > stack? That sounds much better. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
