>From what I have gathered from 4.4bsd book and 4.3 freebsd source code, struct buf and various b* (read, write etc) functions implement the file cache. I am wondering where the physical pages that struct buf has references to reside in the vm map. It seems its virtual addresses are allocated using buffer_map. Well my real question would be, does the vm maintain a file cache independent of the file cache using struct buf?
And this is quite a different question but I will ask here. When a user does a read (followed by open) on a file, the kernel must allocate vnode corresponding to that file right? Assuming the file is not memory-mapped by any other process, would the vnode still have a valid v_object field? Ahh I am confused. Thanks in advance. John To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
