On Wednesday 22 June 2005 15:52, MHD.Tayseer wrote: > if you do `ltrace -S cp file1 file2` you'll see that all the read and > write syscalls are of units of 4K .. > can i take this assumption and expect a maximum length for read and > write of 4K (thus it's safe to kmalloc the all requested size without > partitioning the request into smaller pieces cause of the assumption > taken above or it's only true for calles through c library ? No. Never assume anything about what you'll get from userspace. If someone does a read(fd, buf, 1000000) it doesn't mean you have to return that many bytes. That is just the most you can return. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
