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Differential D18430

Reduce mountd DNS queries
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Authored by sef on Dec 4 2018, 10:12 PM.
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imp

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mav
imp
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rS341641: Reduce number of DNS queries in mountd.
Summary

Right now, mountd does a getnameinfo call for every request, even ones where it doesn't use them. A FreeNAS user noticed this was resulting in large delays (due to a resolv.conf error); in looking at the code, there's no reason for it to call getnameinfo in most cases.

Test Plan

Export files via NFS, and ensure mounting on client works.

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rS FreeBSD src repository - subversion
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Event Timeline

sef created this revision.Dec 4 2018, 10:12 PM
Herald added a subscriber: imp. · View Herald TranscriptDec 4 2018, 10:12 PM
imp accepted this revision.Dec 4 2018, 10:21 PM

lgtm

This revision is now accepted and ready to land.Dec 4 2018, 10:21 PM
mav added a comment.Dec 5 2018, 8:04 PM

Generally looks good to me, except one cosmetic issue -- the line seems to go beyond 80 columns, so it would be nice to re-wrap it earlier.

sef updated this revision to Diff 51637.Dec 6 2018, 2:37 AM

Fix the larger-than-80-columns I got from using the wrong window for my editing.

This revision now requires review to proceed.Dec 6 2018, 2:37 AM
sef added a comment.Dec 6 2018, 2:37 AM
In D18430#392768, @mav wrote:

Generally looks good to me, except one cosmetic issue -- the line seems to go beyond 80 columns, so it would be nice to re-wrap it earlier.

Fixed!

mav accepted this revision.Dec 6 2018, 5:03 AM
This revision is now accepted and ready to land.Dec 6 2018, 5:03 AM
Closed by commit rS341641: Reduce number of DNS queries in mountd. (authored by sef). · Explain WhyDec 6 2018, 6:22 PM
This revision was automatically updated to reflect the committed changes.

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PathSize
head/
usr.sbin/
mountd/
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Diff 51673

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head/usr.sbin/mountd/mountd.c

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