lkml.org 
[lkml]   [2018]   [Jan]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] mm: ratelimit end_swap_bio_write() error
On (01/06/18 14:34), Michal Hocko wrote:
> > zsmalloc allocation is just one possibility; an error in
> > compressing algorithm is another one, yet is rather unlikely.
> > most likely it's OOM which can cause problems. but in any case
> > it's sort of unclear what should be done. an error can be a
> > temporary one or a fatal one, just like in __swap_writepage()
> > case. so may be both write error printk()-s can be dropped.
>
> Then I would suggest starting with sorting out which of those errors are
> critical and which are not and report the error accordingly. I am sorry
> to be fuzzy here but I am not familiar with the code to be more
> specific. Anyway ratelimiting sounds more like a paper over than a real
> solution. Also it sounds quite scary that you can see so many failures
> to actually lock up the system just by printing a message...

the lockup is not the main problem and I'm not really trying to
address it here. we simply can fill up the entire kernel logbuf
with the same "Write-error on swap-device" errors.

-ss

\
 
 \ /
  Last update: 2018-01-14 23:16    [W:0.092 / U:0.572 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site