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[ If this is wrong ML, will appreciate pointer to correct one. ] [ CC: me, please - I'm not sub'd. ] [ Intel's driver as in 2.6.5 - http://lxr.linux.no/source/drivers/net/e1000/e1000_main.c?v=2.6.5 ] I'm looking into e1000 driver in irq handling and what I see, puzzles me. Functions e1000_clean_{t,r}x_irq are very similar: both of them are checking descriptor flag updated by nic. Host CPU, obviously, to perform this check, will cache descriptor. If, say e1000_clean_rx_irq() will be called twice in short time range, I expect that it can miss change of the flag, since old flag may still sit in host CPU cache. Am I missing something here? -- Johnson's law: Systems resemble the organizations that create them. -- ___ ___ Ihar 'Philips' Filipau \ / Sr. Software Developer Tel: +49 681 959 16 0 \ / GIGA STREAM Fax: +49 681 959 16 100 \/ Konrad Zuse Strasse 7 Mobile: +49 173 39 462 49 /\ 66115 Saarbruecken email: ifilipau@giga-stream.de / \ Germany www: http://www.giga-stream.de ___/ \___ Switching for success [unhandled content-type:application/x-pkcs7-signature] | ||||||||||||
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