RE: [PATCH v2 0/2] enable hires timer to timeout datagram socket

From	David Laight <David.Laight@ACULAB.COM>
Newsgroups	linux.kernel
Subject	RE: [PATCH v2 0/2] enable hires timer to timeout datagram socket
Date	2017-08-29 13:20 +0200
Message-ID	<ujMIO-1VL-3@gated-at.bofh.it> (permalink)
References	<uhryN-1AG-9@gated-at.bofh.it> <uhvCq-4iI-15@gated-at.bofh.it> <ujcFk-4iC-13@gated-at.bofh.it>
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From: Vallish Vaidyeshwara
> Sent: 27 August 2017 21:47
...
> I respect the decision not to upstream this patch series, however I
> wanted to provide additional details. Application wanting high
> resolution events with real guarantees is not the case, but the case
> here is regression in system call behavior:
> 
> 1) Change in system call behavior:
> strace from 4.4 test run of waiting for 180 seconds on datagram socket:
> 10:25:48.239685 setsockopt(3, SOL_SOCKET, SO_RCVTIMEO, "\264\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
> 10:25:48.239755 recvmsg(3, 0x7ffd0a3beec0, 0) = -1 EAGAIN (Resource temporarily unavailable)
> 10:28:48.236989 fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0

IMHO you should be complaining to the main kernel group who 'broke' the
timer code, not the networking group.

	David

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Re: [PATCH v2 0/2] enable hires timer to timeout datagram socket Vallish Vaidyeshwara <vallish@amazon.com> - 2017-08-27 22:50 +0200
  RE: [PATCH v2 0/2] enable hires timer to timeout datagram socket David Laight <David.Laight@ACULAB.COM> - 2017-08-29 13:20 +0200

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