> In article <[EMAIL PROTECTED]> you wrote: > > Hi, > > > On Thu, Feb 01, 2001 at 05:34:49PM +0000, Alan Cox wrote: > > In the disk IO case, you basically don't get that (the only thing > > which comes close is raid5 parity blocks). The data which the user > > started with is the data sent out on the wire. You do get some > > interesting cases such as soft raid and LVM, or even in the scsi stack > > if you run out of mailbox space, where you need to send only a > > sub-chunk of the input buffer. > > Though your describption is right, I don't think the case is very common: > Sometimes in LVM on a pv boundary and maybe sometimes in the scsi code. And if you are writing to a striped volume via a filesystem which can do it's own I/O clustering, e.g. I throw 500 pages at LVM in one go and LVM is striped on 64K boundaries. Steve - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] Please read the FAQ at http://www.tux.org/lkml/
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compound e... Christoph Hellwig
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: Compo... Alan Cox
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Christoph Hellwig
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Alan Cox
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Rik van Riel
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... yodaiken
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Stephen C. Tweedie
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Stephen C. Tweedie
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Chaitanya Tumuluri
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Christoph Hellwig
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Steve Lord
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Christoph Hellwig
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Steve Lord
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Stephen C. Tweedie
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Stephen C. Tweedie
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Christoph Hellwig
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Stephen C. Tweedie
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Ingo Molnar
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Stephen C. Tweedie
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Alan Cox
- Re: [Kiobuf-io-devel] RFC: Kernel mechanism: C... Stephen C. Tweedie