Lazy TSS's I/O bitmap update Lazy TSS's I/O bitmap update patch implements a lazy TSS's I/O bitmap copy for the i386 and x86-64 architecture.
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bitmap I/O TSS kernel patch bitmap update I/O patch

Lazy TSS's I/O bitmap update Description

Lazy TSS's I/O bitmap update patch implements a lazy TSS's I/O bitmap copy for the i386 and x86-64 architecture. Lazy TSS's I/O bitmap update patch implements a lazy TSS's I/O bitmap copy for the i386 and x86-64 architecture. Instead of copying the bitmap at every context switch, the TSS's I/O bitmap offset is set to an invalid offset, so that an attempt to access the bitmap from the CPU will trigger a GP fault.It is lazily at that stage that the bitmap is updated, by hence avoiding bitmap copies in cases where the switched task do not perfom any I/O operation.

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