lkml.org 
[lkml]   [2017]   [May]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/2] zram: do not count duplicated pages as compressed
On Wed, May 17, 2017 at 05:32:12PM +0900, Minchan Kim wrote:
> Is block device(esp, zram which is compressed ram block device) okay to
> return garbage when ongoing overwrite IO fails?
>
> O_DIRECT write 4 block "aaa.." -> success
> read 4 block "aaa.." -> success
> O_DIRECT write 4 block "bbb.." -> fail
> read 4 block "000..' -> it is okay?
>
> Hope to get an answer form experts. :)

It's "okay" as it's what existing real block devices do (at least on a
sector boundary). It's not "nice" though, so if you can avoid it,
please do.

\
 
 \ /
  Last update: 2017-05-21 09:05    [W:0.163 / U:0.636 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site