On Tue, Mar 23, 2010 at 08:53:42PM +0000, Russell King - ARM Linux wrote: > On Sun, Mar 21, 2010 at 09:06:03PM -0400, Christoffer Dall wrote: > > This small commit introduces a global state of system calls for ARM > > making it possible for a debugger or checkpointing to gain information > > about another process' state with respect to system calls. > > I don't particularly like the idea that we always store the syscall > number to memory for every system call, whether the stored version is > used or not. > > Since ARM caches are generally not write allocate, this means mostly > write-only variables can have a higher than expected expense. > > Is there not some thread flag which can be checked to see if we need to > store the syscall number? Perhaps before we freeze the task we can save the syscall number on ARM. The patches suggest that the signal delivery path -- which the freezer utilizes -- has the syscall number already. Should work since the threads must be frozen first anyway. Cheers, -Matt Helsley _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
