[lkml]   [2020]   [Feb]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: BLKSECDISCARD ioctl and hung tasks
On Fri, Feb 14, 2020 at 7:47 PM Ming Lei <> wrote:
> What are the 'other operations'? Are they block IOs?
> If yes, that is why I suggest to fix submit_bio_wait(), which should cover
> most of sync bio submission.
> Anyway, the fix is simple & generic enough, I'd plan to post a formal
> patch if no one figures out better doable approaches.

Yeah I think any block I/O operation that occurs after the
BLKSECDISCARD is submitted will also potentially be affected by the
hung task timeouts, and I think your patch will address that. My only
concern with it is that it might hide some other I/O "hangs" that are
due to device misbehavior instead. Yes driver and device timeouts
should generally catch those, but with this in place we might miss a
few bugs.

Given the nature of these types of storage devices though, I think
that's a minor issue and not worth blocking the patch on, given that
it should prevent a lot of false positive hang reports as Salman


 \ /
  Last update: 2020-02-18 17:12    [W:0.072 / U:2.208 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site