• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
A question about NFS delay-write
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

A question about NFS delay-write


  • Subject: A question about NFS delay-write
  • From: Sid Moore <email@hidden>
  • Date: Fri, 23 Dec 2011 18:12:03 +0800

Hello.

I have a quest about NFS delay-write. As you know, NFS client will try
to merge as much writing request as possible to a nfsbuffer, writing
it to NFS server when it is full of dirty pages if CacheIO. But dirty
pages bitmap in a nfsbuf object are never explicitly set in
nfs_vnop_write() flow. So, in delay-write case, pages involved in
small grain writing IO was not set to be dirty. After
nfs_buf_release(), I think Mach VM will regards them as valid and
non-dirty pages. So, those pages would be dropped if memory shortage,
rather than be pageout to NFS server.

Am I correct? If so, I think it is a bug?

Best Regards,
Sid Moore
 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Filesystem-dev mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden

  • Prev by Date: Re: Can anyone tell me exactly what /.MobileBackups is for?
  • Next by Date: Plist
  • Previous by thread: Re: Can anyone tell me exactly what /.MobileBackups is for?
  • Next by thread: Plist
  • Index(es):
    • Date
    • Thread