From: Jens Axboe <axboe@kernel.dk>
To: Goldwyn Rodrigues <rgoldwyn@suse.de>, linux-fsdevel@vger.kernel.org
Cc: jack@suse.com, hch@infradead.org, linux-block@vger.kernel.org,
linux-api@vger.kernel.org, viro@zeniv.linux.org.uk,
akpm@linux-foundation.org, Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: Re: [PATCH 07/10] block: return on congested block device
Date: Thu, 15 Jun 2017 10:42:58 -0600 [thread overview]
Message-ID: <6e138fe9-ad88-bf94-f0bb-c95d2f3cb705@kernel.dk> (raw)
In-Reply-To: <20170615160002.17233-8-rgoldwyn@suse.de>
On 06/15/2017 09:59 AM, Goldwyn Rodrigues wrote:
> From: Goldwyn Rodrigues <rgoldwyn@suse.com>
>
> A new bio operation flag REQ_NOWAIT is introduced to identify bio's
> orignating from iocb with IOCB_NOWAIT. This flag indicates
> to return immediately if a request cannot be made instead
> of retrying.
>
> Stacked devices such as md (the ones with make_request_fn hooks)
> currently are not supported because it may block for housekeeping.
> For example, an md can have a part of the device suspended.
> For this reason, only request based devices are supported.
> In the future, this feature will be expanded to stacked devices
> by teaching them how to handle the REQ_NOWAIT flags.
Looks fine to me now. I don't know what tree will take these patches,
but if it's not block, then you can add:
Reviewed-by: Jens Axboe <axboe@kernel.dk>
--
Jens Axboe
next prev parent reply other threads:[~2017-06-15 16:42 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-15 15:59 [PATCH 0/10 v12] No wait AIO Goldwyn Rodrigues
2017-06-15 15:59 ` [PATCH 01/10] fs: Separate out kiocb flags setup based on RWF_* flags Goldwyn Rodrigues
2017-06-15 15:59 ` [PATCH 02/10] fs: Introduce filemap_range_has_page() Goldwyn Rodrigues
[not found] ` <20170615160002.17233-3-rgoldwyn-l3A5Bk7waGM@public.gmane.org>
2017-06-15 18:25 ` Andrew Morton
2017-06-15 15:59 ` [PATCH 03/10] fs: Use RWF_* flags for AIO operations Goldwyn Rodrigues
2017-06-15 15:59 ` [PATCH 04/10] fs: Introduce RWF_NOWAIT and FMODE_AIO_NOWAIT Goldwyn Rodrigues
[not found] ` <20170615160002.17233-5-rgoldwyn-l3A5Bk7waGM@public.gmane.org>
2017-06-17 4:09 ` Al Viro
2017-06-17 11:53 ` Christoph Hellwig
2017-06-15 15:59 ` [PATCH 05/10] fs: return if direct write will trigger writeback Goldwyn Rodrigues
[not found] ` <20170615160002.17233-1-rgoldwyn-l3A5Bk7waGM@public.gmane.org>
2017-06-15 15:59 ` [PATCH 06/10] fs: Introduce IOMAP_NOWAIT Goldwyn Rodrigues
2017-06-15 18:25 ` [PATCH 0/10 v12] No wait AIO Andrew Morton
2017-06-15 21:51 ` Goldwyn Rodrigues
[not found] ` <1003b3e8-a775-e8ac-d1ca-11055d941a98-l3A5Bk7waGM@public.gmane.org>
2017-06-15 22:01 ` Andrew Morton
[not found] ` <20170615150100.52c0387406e6ce5167dc098e-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2017-06-15 23:49 ` Goldwyn Rodrigues
2017-06-16 8:54 ` Jan Kara
2017-06-15 15:59 ` [PATCH 07/10] block: return on congested block device Goldwyn Rodrigues
2017-06-15 16:42 ` Jens Axboe [this message]
2017-06-15 16:00 ` [PATCH 08/10] ext4: nowait aio support Goldwyn Rodrigues
2017-06-15 16:00 ` [PATCH 09/10] xfs: " Goldwyn Rodrigues
2017-06-15 16:00 ` [PATCH 10/10] btrfs: " Goldwyn Rodrigues
-- strict thread matches above, loose matches on Subject: below --
2017-06-06 11:19 [PATCH 0/10 v11] No wait AIO Goldwyn Rodrigues
2017-06-06 11:19 ` [PATCH 07/10] block: return on congested block device Goldwyn Rodrigues
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