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SubjectIDE block i/o & ordering
Hi !

While working on MacOnLinux (sort of VWWare-like runtime environement to
run MacOS within Linux/PPC), Samuel Rydth found the following issue with
2.2.x kernels. Is this a normal behaviour, a known bug or a PPC-specific
issue I should look into more details ?

---------------- Begin Forwarded Message ----------------
Btw. I found an oddity with the IDE block device interface
(causes problems with DropStuffit in MacOS 9). In a sequence like

write A to sector N
write B to sector N
read sector N

then the read might not return the information "B" (but something
else). I've always assumed that the block device drivers were
supposed to enforce this consistency but I might be wrong. Everything
work as it should if an extra "fsync" is inserted after each
write. This might impact driver performance though.


----------------- End Forwarded Message -----------------

Ben.



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