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Wed, 14 Dec 2005

Ok, it looks like only one problem remains - data integrity.


All journaling changes are just to adjust h_buffer_credits when starting a journal with existing handle, which happens when ->prepare_write() is called several times before ->commit_write().
ext3 changes are simple too: commented check for current journaling handler in ext3_write_inode(), which is related to above changes.

With all this changes receiving zero-copy has only one problem - data corruption. Sometimes several pages are eaten from the flow, and it looks like a race between running in process context commit code and running in interrupt data copying.

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