27 messages in org.freebsd.freebsd-hackersNFS client/buffer cache deadlock| From | Sent On | Attachments |
|---|---|---|
| Brian Fundakowski Feldman | Apr 14, 2005 10:07 pm | |
| Marc Olzheim | Apr 15, 2005 6:21 am | |
| Brian Fundakowski Feldman | Apr 15, 2005 8:21 am | |
| Marc Olzheim | Apr 18, 2005 2:25 am | |
| Marc Olzheim | Apr 19, 2005 6:32 am | |
| Brian Fundakowski Feldman | Apr 19, 2005 8:18 am | |
| Marc Olzheim | Apr 19, 2005 9:02 am | |
| Marc Olzheim | Apr 19, 2005 9:09 am | |
| Brian Fundakowski Feldman | Apr 19, 2005 9:17 am | |
| Brian Fundakowski Feldman | Apr 19, 2005 1:48 pm | |
| Marc Olzheim | Apr 20, 2005 7:04 am | |
| Brian Fundakowski Feldman | Apr 20, 2005 7:26 am | |
| Marc Olzheim | Apr 20, 2005 7:39 am | |
| Brian Fundakowski Feldman | Apr 20, 2005 8:22 am | |
| Marc Olzheim | Apr 20, 2005 8:35 am | |
| Brian Fundakowski Feldman | Apr 20, 2005 8:54 am | |
| Jilles Tjoelker | Apr 20, 2005 10:12 am | |
| Brian Fundakowski Feldman | Apr 20, 2005 10:31 am | |
| Brian Fundakowski Feldman | Apr 20, 2005 11:03 am | |
| Marc Olzheim | Apr 20, 2005 11:03 am | |
| Dag-Erling Smørgrav | Apr 21, 2005 1:36 am | |
| Garrett Wollman | Apr 21, 2005 4:50 am | |
| Garrett Wollman | Apr 21, 2005 4:51 am | |
| Garrett Wollman | Apr 22, 2005 5:49 am | |
| Brian Fundakowski Feldman | Apr 22, 2005 8:12 am | |
| Brian Fundakowski Feldman | Apr 22, 2005 8:38 am | |
| Garrett Wollman | Apr 23, 2005 5:09 am |
| Subject: | NFS client/buffer cache deadlock | |
|---|---|---|
| From: | Brian Fundakowski Feldman (gre...@FreeBSD.ORG) | |
| Date: | Apr 22, 2005 8:12:02 am | |
| List: | org.freebsd.freebsd-hackers | |
On Wed, Apr 20, 2005 at 01:29:10PM -0400, Garrett Wollman wrote:
<<On Wed, 20 Apr 2005 11:52:33 -0400, Brian Fundakowski Feldman
<gre...@FreeBSD.ORG> said:
I think the first is more useful behavior than the last. Supporting it should be exactly the same as supporting what happens if the actual filesystem fills up. In this case, the filesystem is being requested to write more "than there is room for."
Returning a short write for operations on regular files would definitely be considered astonishing. The changes that you have made should be considered flow control, not admission control, and should appear to the user no differently than if we were waiting for a slow disk to write something; i.e., the user thread should be blocked until either the entire write completes, or the process is interrupted by a signal.
Can you find any evidence that it's acceptable to interleave multiple writers that are doing O_APPEND? At best, to do what you're asking, they could be kept from being interleaved from the context of one specific NFS client host...
-- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> gre...@FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\