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SubjectRe: bugs/regressions: report in LKML or in bugzilla?
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On Tue, 2010-12-07 at 17:12 +0100, Eric Dumazet wrote:
> Le mardi 07 décembre 2010 à 16:39 +0100, Martin Steigerwald a écrit :
>
> > A participant of a linux performance training I hold found a bug with
> > window scaling which did not receive any reply as well:
> >
> > Bug 20312 - System freeze with multiples of 32 in
> > /proc/sys/net/ipv4/tcp_adv_win_scale
> > https://bugzilla.kernel.org/show_bug.cgi?id=20312
> >
>
> User bug ?
>
> Documentation/networking/ip-sysctl.txt
>
> tcp_adv_win_scale - INTEGER
> Count buffering overhead as bytes/2^tcp_adv_win_scale
> (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale),
> if it is <= 0.
> Default: 2
>
> Given we use 32bit numbers, using values outside of [-31 ... 31] makes litle sense.
>
> We could add sysctl range limit, but user should not mess with
> /proc/sys/net/ipv4/parameters unless he knows what he is doing ?
[...]

For mere humans, the range is not quite os obvious. Which is why this
has been fixed in net-2.6 (as noted on that bug report now).

Ben.

--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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