Eric W. Biederman wrote: > Nadia.Derbey@xxxxxxxx writes: > > >>[PATCH 05/05] >> >>This patch uses the value written into the next_syscall_data proc file >>as a target file descriptor for the next file to be opened. >> >>This makes it easy to restart a process with the same fds as the ones it was >>using during the checkpoint phase, instead of 1. opening the file, 2. dup2'ing >>the open file descriptor. > > > As it happens the behavior of open is deterministic. So if you open > the files in the right order you should not need this. dup2 is only needed > if there is a gap in the fds used. > This covers the case where you're checkpointing a process that has 1. opened, say 3 files (fds x, x+1, and x+2) 2. closed fd x+1 --> checkpoint occurs at that point. During restart, you'll have to only recreate fds x and x+2. But I'm realizing that this might be what you're calling a gap in the fds ;-) Regards, Nadia _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
