Sunday, 24 May 2009

Race Condition in netio.sys on Vista (and allusion to BIOS shadowing)

This results in BSOD on multiprocessor system. Solution is to download the MS hotfix (they will send you a password protected zip file to install the hotfix from).More details here.
When your PC crashes you may also see a message to disable ROM caching or shadowing. ROM is much slower to access than RAM (120ns compared with 50ns, say), so a performance "trick" is to shadow the ROM in the RAM (i.e. mirror the code). There is usually a separate parameter to control the shadowing of the system BIOS, video BIOS and adapter ROM areas.

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