30 messages in org.freebsd.freebsd-hackersRe: swapoff?| From | Sent On | Attachments |
|---|---|---|
| Sean Kelly | Jul 12, 2002 9:02 pm | |
| David Schultz | Jul 12, 2002 10:23 pm | |
| David Schultz | Jul 12, 2002 10:32 pm | |
| Matthew Dillon | Jul 12, 2002 11:51 pm | |
| David Schultz | Jul 13, 2002 12:18 am | |
| Matthew Dillon | Jul 13, 2002 12:27 am | |
| Peter Wemm | Jul 13, 2002 12:33 am | |
| Andrey Alekseyev | Jul 13, 2002 1:23 am | |
| Terry Lambert | Jul 13, 2002 3:17 am | |
| Jon Mini | Jul 13, 2002 3:44 am | |
| Terry Lambert | Jul 13, 2002 4:30 am | |
| David Schultz | Jul 13, 2002 4:57 am | |
| Terry Lambert | Jul 13, 2002 5:22 am | |
| Matthew Dillon | Jul 13, 2002 9:36 am | |
| David Schultz | Jul 13, 2002 2:00 pm | |
| Peter Wemm | Jul 13, 2002 3:39 pm | |
| David Schultz | Oct 7, 2002 8:38 am | |
| Matthew Dillon | Oct 7, 2002 4:46 pm | |
| Nate Lawson | Oct 7, 2002 9:47 pm | |
| David Schultz | Oct 8, 2002 4:35 am | |
| David Schultz | Oct 8, 2002 4:39 am | |
| Matthew Dillon | Oct 8, 2002 10:04 am | |
| Matthew Dillon | Oct 8, 2002 10:45 am | |
| David Schultz | Oct 11, 2002 6:01 am | |
| Matthew Dillon | Oct 11, 2002 11:14 am | |
| David Schultz | Oct 14, 2002 2:41 am | |
| Matthew Dillon | Oct 14, 2002 8:55 am | |
| David Schultz | Oct 15, 2002 12:10 am | |
| David Schultz | Oct 23, 2002 11:07 am | |
| Matthew Dillon | Oct 23, 2002 11:45 am |
| Subject: | Re: swapoff? | |
|---|---|---|
| From: | Terry Lambert (tlam...@mindspring.com) | |
| Date: | Jul 13, 2002 3:17:11 am | |
| List: | org.freebsd.freebsd-hackers | |
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
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