RE: [PATCH] block: Make write_hints[] big enough

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> -----Original Message-----
> From: Jens Axboe <axboe@xxxxxxxxx>
> Sent: Thursday, October 18, 2018 5:38 PM
> To: Avri Altman <Avri.Altman@xxxxxxx>; linux-block@xxxxxxxxxxxxxxx
> Cc: Avi Shchislowski <Avi.Shchislowski@xxxxxxx>; Alex Lemberg
> <Alex.Lemberg@xxxxxxx>
> Subject: Re: [PATCH] block: Make write_hints[] big enough
> 
> On 10/17/18 10:51 AM, Avri Altman wrote:
> > Just stumbled over this.
> > Looks like the write hints array in the request queue is not allotted
> > with the required space to accommodate all the write hint types.
> >
> > fixes: f793dfd3f39a (blk-mq: expose write hints through debugfs)
> 
> Your commit message doesn't really explain what you think the issue
> is. We have 4 write hint types, with a fifth being "none". Where
> are we exceeding these 5 hints?
WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME = 5,
will be ignored by queue_write_hint_{show_store}.

Thanks,
Avri

> 
> --
> Jens Axboe





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