Bug 12973 - smbd uses a lot of CPU on startup of a connection
Summary: smbd uses a lot of CPU on startup of a connection
Status: RESOLVED FIXED
Alias: None
Product: Samba 4.1 and newer
Classification: Unclassified
Component: File services (show other bugs)
Version: 4.7.0rc4
Hardware: All All
: P5 normal (vote)
Target Milestone: ---
Assignee: Karolin Seeger
QA Contact: Samba QA Contact
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-08-17 20:28 UTC by Stefan Metzmacher
Modified: 2017-08-30 07:16 UTC (History)
5 users (show)

See Also:

Attachments
Patches for v4-7-test (12.69 KB, patch)
2017-08-23 06:06 UTC, Stefan Metzmacher 		metze: review? (abartlet)
asn: review+
Details
Patches for v4-6-test (12.69 KB, patch)
2017-08-23 06:07 UTC, Stefan Metzmacher 		metze: review? (abartlet)
asn: review+
Details
View All Add an attachment (proposed patch, testcase, etc.)

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Description Stefan Metzmacher 2017-08-17 20:28:48 UTC 
We constantly recalculate all possible kerberos keys to form an
in memory keytab.

As we now store precalculated keys in secrets.tdb, see
https://git.samba.org/?p=samba.git;a=commitdiff;h=5f0038fba612afd7fc15b7ab321df979891170d8
we can use them to avoid waste so much CPU cycles.
Comment 1 Stefan Metzmacher 2017-08-23 06:06:43 UTC 
Created attachment 13491 [details]
Patches for v4-7-test
Comment 2 Stefan Metzmacher 2017-08-23 06:07:48 UTC 
Created attachment 13492 [details]
Patches for v4-6-test
Comment 3 Andreas Schneider 2017-08-24 05:59:15 UTC 
Karolin, please add the patches to the relevant branches. Thanks!
Comment 4 Karolin Seeger 2017-08-28 08:40:59 UTC 
Pushed to autobuild-v4-{7,6}-test.
Comment 5 Karolin Seeger 2017-08-30 07:16:28 UTC 
Pushed to both branches.
Closing out bug report.

Thanks!