Messages in this thread | | | Date | Tue, 02 Nov 1999 09:56:28 -0700 | From | "Jeff V. Merkey" <> | Subject | Re: Linux Buffer Cache Does Not Support Mirroring |
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I looked at the brw_page code. While everyone calls this an "async" interface, in fact, it uses the same semantic as a sync interface and does not allow support for callbacks.
Jeff
kernel@kvack.org wrote: > > On Mon, 1 Nov 1999, Jeff V. Merkey wrote: > > > What everyone is side-stepping is that the interface between the drivers > > and the buffer cache is incestuous > > What do you mean by incestuous -- if you mean that they depend on it, > you're thinking of things in the wrong way. Think of the buffer_head as a > block io tag. The block drivers themselves don't interact with the buffer > cache, they interact with requests. > > > -- this prevents folks from building > > async I/O based FS's on Linux. The solution is not a simple one -- the > > drivers and buffer cache interface needs to be changed to elimnate these > > dependencies so. > > So you're incapable of making use of b_end_io to complete an async io > request? Wow. > > -ben > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
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