linux-kernel - Re: [PATCH 1/2] zram: remove BD_CAP_SYNCHRONOUS

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Message-ID: <20180803054550.GD502@jagdpanzerIV>
Date:   Fri, 3 Aug 2018 14:45:51 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     Minchan Kim <minchan@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Tino Lehnig <tino.lehnig@...tabo.de>, stable@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH 1/2] zram: remove BD_CAP_SYNCHRONOUS_IO with writeback
 feature

On (08/03/18 14:23), Sergey Senozhatsky wrote:
> 
> Hmm, any chance a WB device can be async on its own? We add a page
> to a new bio and submit it to another async device driver. Then we
> return back to the upper layer (swap), which can free a page before
> the device picks up a request. Can this happen?

Nevermind these questions.
Sorry for the noise.

	-ss