[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: NFS lockfiles etc: alpha implementation



In article <E0wfnZN-0006rv-00@miriam.fuller.edu>,
Christoph Lameter <clameter@miriam.fuller.edu> wrote:
>Also check with Philip Hazel ph10@cus.cam.ac.uk who has done a significant
>amount of research on that issue for exim.
>The locking code in exim is probably the newest, most up to date code I know.

I just read the code in exim, and it does exactly the same as my
code :). Only exim relies (in certain occasions, AFAIK) on the st_nlink
value from stat(), which is know to be incorrect sometimes over NFS due
to caching. Otherwise exim & liblockfile use the same algorithm.

I see that exim also uses locking with fcntl() AFTER using a lockfile.
I should probably also use that for maillock().

I must say, the exim code is extremely well commented, and the comments
are very coherent. I'll probably use some of it as a base for documenting
liblockfile.

Mike.
-- 
| Miquel van Smoorenburg |  "I need more space" "Well, why not move to Texas" |
| miquels@cistron.nl     |  "No, on my account, stupid." "Stupid? Uh-oh.."    |
|     PGP fingerprint: FE 66 52 4F CD 59 A5 36  7F 39 8B 20 F1 D6 74 02       |


--
TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to
debian-devel-request@lists.debian.org . 
Trouble?  e-mail to templin@bucknell.edu .


Reply to: