From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Mon, 13 Dec 1999 10:28:05 +0100 To: linuxppc-dev@lists.linuxppc.org CC: paulus@linuxcare.com From: Benjamin Herrenschmidt Subject: Weird IDE block devices problem Message-Id: <19991213102805.001474@mailhost.mipsys.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Hi ! Samuel Rydth (the author of Mac-On-Linux) sent me the following message. This sound weird since it looks like order is not enforced by the IDE block driver. Is this normal or is this a kernel bug ? I beleive it happened with 2.2.10-2.2.13 kernels (I have to confirm this). On Sun, Dec 12, 1999, Samuel Rydh wrote: ---------------- Begin Forwarded Message ---------------- Btw. I found an oddity with the IDE block device interface (causes problems with DropStuffit in MacOS 9). In a sequence like write A to sector N write B to sector N read sector N then the read might not return the information "B" (but something else). I've always assumed that the block device drivers were supposed to enforce this consistency but I might be wrong. Everything work as it should if an extra "fsync" is inserted after each write. This might impact driver performance though. ----------------- End Forwarded Message ----------------- ** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/