lkml.org 
[lkml]   [2020]   [Mar]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v7 0/6] block: Introduce REQ_ALLOCATE flag for REQ_OP_WRITE_ZEROES
From
Date

Christoph,

> I am very much against that for the following reason:
>
> - the current REQ_OP_DISCARD is purely a hint, and implementations can
> (and do) choose to ignore it
>
> - REQ_OP_WRITE_ZEROES is an actual data integrity operation with
> everything that entails

If you want to keep emphasis on the "integrity operation" instead of the
provisioning aspect, would you expect REQ_ALLOCATE (which may or may not
zero blocks) to be considered a deterministic operation or a
non-deterministic one? Should this depend on whether the device
guarantees zeroing when provisioning blocks or not?

--
Martin K. Petersen Oracle Linux Engineering

\
 
 \ /
  Last update: 2020-03-25 18:25    [W:0.110 / U:0.704 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site