Messages in this thread | | | Date | Wed, 16 Jun 1999 20:50:36 +0200 (CEST) | From | Andrea Arcangeli <> | Subject | Re: [patch] `cp /dev/zero /tmp' (patch against 2.2.9) |
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On Wed, 16 Jun 1999, Stephen C. Tweedie wrote:
>Unfortunately it does completely the wrong thing if you have more than >one disk: it stalls all writes on all disks as soon as any one disk goes >into wait-on-read. That's not good. Not good at all.
I agree that it's _ugly_, but it's equally ugly that we currently may block due out of request slots, without being able to start I/O on the second blockdevice.
Said that, did you verifyied that you really lost performances under high I/O load using two block devices? (as just said I agree with you about the theory)
Andrea Arcangeli
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