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Date: | Sat, 28 Nov 2015 16:54:52 +0100 |
From: | Corinna Vinschen <corinna-cygwin AT cygwin DOT com> |
To: | cygwin AT cygwin DOT com |
Subject: | Re: 64bit cygwin 2.4.0-0.4 hangs when pinging unresponsive host |
Message-ID: | <20151128155452.GY2755@calimero.vinschen.de> |
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References: | <01f501d12701$d5af6fb0$810e4f10$@vianet.ca> <5654E4E3 DOT 8050605 AT gmail DOT com> <56555DF4 DOT 9090804 AT towo DOT net> <56559566 DOT 7070808 AT gmail DOT com> <565621A3 DOT 3090706 AT gmail DOT com> <20151126201546 DOT GQ2755 AT calimero DOT vinschen DOT de> <20151127150737 DOT GA15906 AT calimero DOT vinschen DOT de> <56587B21 DOT 50002 AT gmail DOT com> |
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--yypaS3FvPkEUiGyo Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Nov 27 16:47, Marco Atzeri wrote: > On 27/11/2015 16:07, Corinna Vinschen wrote: > >>>> 64 $ ping 2.2.2.2 > >>>>PING 2.2.2.2 (2.2.2.2): 56 data bytes > >>>> > >>>>----2.2.2.2 PING Statistics---- > >>>>2 packets transmitted, 0 packets received, 100.0% packet loss > >>> > >>> > >>>the problem seems restricted to the 64bit test version of cygwin. > >> > >>I think this is pure coincidence. After some hours debugging this > >>problem it seems it's a race condition, architecture-independent and > >>present since quite a while in Cygwin. In case of ping the race leads > >>to a blocking socket function missing a signal arrived, thus the > >>signal is never handled. This in turn blocks the next signal from being > >>delivered. > >> > >>I have a potential fix, but I have to test it a bit. The signal code > >>is pretty complicated... > > > >I created a new developer snapshot (https://cygwin.com/snapshots/) and > >I'm just about writing the release message for the next test release > >2.4.0-0.5 which both contain a patch for this problem. Please give > >any of them a try. > > > > > >Thanks, > >Corinna > > >=20 >=20 > It works fine for me Good start. Thanks for your feedback. Corinna --=20 Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat --yypaS3FvPkEUiGyo Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWWc5MAAoJEPU2Bp2uRE+gX9cQAJlQx5eIg3YpxoBRZdCusw/K 9JO2WphbClp9JmgXSJbDCyaRbdcDdDT1mAxVkzBrB6Tbw9JOriJ5K51uTygM3FsM gviUKgxnjzJnkpDd+YEVkkmGmbocyX5zGBPbocf4nLY4h8H8tSDPssRPsuy3TT7a 5Uc2k+cvA1m6X60CAg1wIFFuROlH/5gYZezPjvpuTxyIsO7/1M+VRM/NRfX4MREs S0FB0RIIA9rCS2ykKWUcjoAXxJnijwS32Up1DUeuIacqDPnNSMFQ9wClMs/eELkr 8YvGcaFWXAF2/F1xpKLX3oFbVBAxg2s5aPWHAgwNqwgzIcEHmldVtbiPjU3nulpU jqAsC9T7eLO6IbL16xhnynKTTwDTn/8pzaquw+mze9eiL/o4/kDSKxMLKeHKy2ij T285CEWN+uTMWhUwp6jWtSemuzvia4lQ2ipcAy6Aepca/W9+aNGbjmz1uOR7LUQD zNOOFEkzDGcudsyR3OpUrvL/utapaUHZOoNgeH3RSiDpVScCJ4vCey9UndIjO5Cz HKVjatiq73TivNQnVOIxBrp5UZ52WgP/Yg/SJ9IIOqL3Oe96ny3k1nxGmbd5dFII 13tyTpoiGOec+ObmoOnIYb0MMzKraW1WfAjGel6rNJOPo5d0lioOStGQQxU3VAg0 OpnvHTD1euTiPVtVLNGf =fjhn -----END PGP SIGNATURE----- --yypaS3FvPkEUiGyo--
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