Date: Fri, 6 Sep 2002 15:10:19 +0200 (CEST) From: Michal Mertl <mime@traveller.cz> To: current@freebsd.org Cc: alfred@freebsd.org Subject: bug in sysv semaphores on -CURRENT Message-ID: <Pine.BSF.4.41.0209061411380.77195-200000@prg.traveller.cz>
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This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --0-1618928097-1031317473=:77195 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII Content-ID: <Pine.BSF.4.41.0209061505411.77195@prg.traveller.cz> There seems to be bug in $SUBJ. When I run attached program on recent -CURRENT, it always (after several seconds) triggers the bug. I first suspected a problem in the program's logic but on stable in runs just fine. Esentially I use piece of shm memory to pass some data between several processes. I implemented simple locking functions with semaphores and noticed it behaves strange on -CURRENT and ok on -STABLE. CCing Alfred because he made some changes into the kernel part of $SUBJ. I don't expect the bug is new though. May I ask someone with older -CURRENT to try running the program for a minute? -- Michal Mertl mime@traveller.cz --0-1618928097-1031317473=:77195 Content-Type: TEXT/PLAIN; CHARSET=US-ASCII; NAME="ipctest.c" Content-Transfer-Encoding: BASE64 Content-ID: <Pine.BSF.4.41.0209061504330.77195@prg.traveller.cz> Content-Description: Content-Disposition: ATTACHMENT; FILENAME="ipctest.c" I2luY2x1ZGUgPHN5cy90eXBlcy5oPg0KI2luY2x1ZGUgPHN5cy9pcGMuaD4N CiNpbmNsdWRlIDxzeXMvc2VtLmg+DQojaW5jbHVkZSA8c3lzL3NobS5oPg0K I2luY2x1ZGUgPGVycm5vLmg+DQojaW5jbHVkZSA8c3RkbGliLmg+DQojaW5j bHVkZSA8c3RkaW8uaD4NCiNpbmNsdWRlIDxzdHJpbmcuaD4NCiNpbmNsdWRl IDx1bmlzdGQuaD4NCg0KI2RlZmluZSBNWV9TSE1fTUFHSUMgMHg1NmQ5ZjEz Yg0KDQp0eXBlZGVmIHN0cnVjdCB7DQoJc3RydWN0IHNobWlkX2RzCSBzaG1f ZHM7DQoJc3RydWN0IHNlbWlkX2RzCSBzZW1fZHM7DQoJcGlkX3QJCSBzZW1f b3duZXI7DQoJaW50CQkgc2VtX2lkOw0KCWludAkJIHNobV9pZDsNCglpbnQJ CSBzaXplOw0KfSBzX2lwY19jZmc7DQoNCnNfaXBjX2NmZyAqaXBjX2NmZyA9 IE5VTEw7DQoNCmludA0KaXBjX3NldHVwKGludCBzaXplKQ0Kew0KCWludCBz 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