Bug 164534 - [bpf] net.bpf.zerocopy_enable=1 makes pflogd eat cpu and hang
Summary: [bpf] net.bpf.zerocopy_enable=1 makes pflogd eat cpu and hang
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: Unspecified
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-net (Nobody)
URL:
Keywords:
Depends on: 163370
Blocks:
  Show dependency tree / graph
 
Reported: 2012-01-27 09:30 UTC by c.kworr
Modified: 2022-11-23 00:08 UTC (History)
2 users (show)

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Description c.kworr 2012-01-27 09:30:12 UTC 
When running kernel with `option ZEROCOPY` and `net.bpf.zerocopy_enable=1`
starting pflogd results in its instant hang and 100% cpu consumption.

Fix: 

Don't play with options not in GENERIC I suppose...
Comment 1 Mark Linimon freebsd_committer freebsd_triage 2012-01-28 04:58:28 UTC 
Responsible Changed
From-To: freebsd-bugs->freebsd-net

Over to maintainer(s).
Comment 2 Christian S.J. Peron freebsd_committer freebsd_triage 2012-01-29 02:52:14 UTC 
Responsible Changed
From-To: freebsd-net->csjp

Take, we have fixes for this, but not real sure we have a solution 
agreed upon yet.
Comment 3 c.kworr 2012-05-07 12:38:44 UTC 
Hi all.

How about at least noting zero_copy instability in man page and at 
src/sys/conf/NOTES?

-- 
Sphinx of black quartz judge my vow.
Comment 4 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 08:00:20 UTC 
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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