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Some process can share one struct file-s, we may find them by "object IDs". A file descriptor is opened in one process and send to other via unix socket. The procedure of restoring files contains four stages. * Collect data about all file's descriptors On this stage we find process which will restore a file descriptor and create a list of processes, who should get this descriptor. * Create datagrams unix sockets If a file descriptor should be received, a unix socket is created instead of it. * Open file descriptors A process with the least pid opens a file and sends this file descriptors to all one who wait it. * Receive file descriptors. When we were thinking up this algoritm, we wanted to minimize a number of context switches. A number of context switches is proportional of a number of processes. Signed-off-by: Andrey Vagin <avagin@openvz.org> Acked-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> |
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| .. | ||
| atomic.h | ||
| bitops.h | ||
| compiler.h | ||
| crtools.h | ||
| files.h | ||
| image.h | ||
| libnetlink.h | ||
| list.h | ||
| lock.h | ||
| log.h | ||
| parasite-syscall.h | ||
| parasite.h | ||
| ptrace.h | ||
| restorer.h | ||
| sockets.h | ||
| syscall-codes.h | ||
| syscall.h | ||
| types.h | ||
| unix_diag.h | ||
| util.h | ||