Re: [PATCH] ide write barrier support

[Greg Stark]

Jens Axboe <axboe@xxxxxxx> writes:

> Hi,
> 
> Forward ported and tested today (with the dummy ext3 patch included),
> works for me. Some todo's left, but I thought I'd send it out to gauge
> interest. TODO:


Is there a user-space interface planned for this? 


One possibility may be just to hang it off fsync(2) so fsync doesn't return
until until all the buffers it flushed are actually synced to disk. That's its
documented semantics anyways.


There's also the case of files opened with O_SYNC. Would inserting a write
barrier after every write to such a file destroy performance?


-- 
greg

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