On Fri, Mar 03, 2023 at 09:39:11PM +0100, Mateusz Guzik wrote: > the allocation routine does not have any information about the size > available at compilation time, so has to resort to a memset call at > runtime. Instead, should this be: > > f = kmem_cache_alloc(...); > memset(f, 0, sizeof(*f)); > > ... the compiler could in principle inititalize stuff as indicated by > code and emit zerofill for the rest. Interestingly, last I checked > neither clang nor gcc knew how to do it, they instead resort to a full > sized memset anyway, which is quite a bummer. For struct file I wouldn't expect a win from that, TBH.
