Messages in this thread |  | | | Subject | Re: bugs/regressions: report in LKML or in bugzilla? | | From | Eric Dumazet <> | | Date | Tue, 07 Dec 2010 17:12:01 +0100 |
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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 ?
Almost all /proc/sys/net/ipv4/parameters dont have range limits and unexpected results with insane values feeded.
An other way to freeze a machine being root is :
halt
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