Matthew Dillon wrote: > * Flag the swap device being removed and then scan all OBJT_SWAP > VM Objects looking for swap blocks associated with the device, > and force a page-in of those blocks. The getpages code for the > swap backing store would detect the flag and not clear the swap > bitmap bits as it pages-in the data. > > (Forcing a pagein may force pages to cycle back out to another > swap device, so special treatment of the paged-in pages (like > immediately placing it in the VM page cache instead of the > active or inactive queues) is necessary to reduce load effects > on the system.
Uh... so you set the bit that tells you it's allocated to prevent it being allocated? When I swap something in and the bit is set, how do I know that it's in, except that it's not allocated? In other words, I do what you say... how do I know when the device has been drained out, vs. being in use? I think you have to disable swapping to the device some other way, and then return fromt he "swapoff" only when the bitmap is all zero. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
