Alasdair G Kergon wrote:
http://thread.gmane.org/gmane.linux.kernel.device-mapper.dm-crypt/1974/focus=1974
On Fri, Dec 01, 2006 at 03:26:49PM +0100, Christophe Saout wrote:
Am Freitag, den 01.12.2006, 00:02 +0300 schrieb Andrey:
- fs asks to write 2048 bytes of zeroes to some sector. It always
happens ONLY with requests of 2K and only if data is all zeroes. It
happens on random sectors. Write request goes w/o error.
- someone (i have vague idea how linux cache works) sends a READA bio
with size of 4K for an area starting with the same sector. It goes down
to raid5 and it returns garbage. The data returned is not all zeroes
and it _looks_ like it returns data that was there before zeroes were
written. here goes the corruption.
Does the write complete before the reada is issued or do they overlap?
Alasdair
before. long before. i haven't seen a single overlap.
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