From: Guenter Roeck <linux@roeck-us.net>
To: Christoph Hellwig <hch@lst.de>
Cc: Jens Axboe <axboe@kernel.dk>, Ming Lei <ming.lei@redhat.com>,
linux-block@vger.kernel.org
Subject: Re: [PATCH 1/5] block: rewrite blk_bvec_map_sg to avoid a nth_page call
Date: Mon, 15 Apr 2019 14:07:31 -0700 [thread overview]
Message-ID: <20190415210731.GA32723@roeck-us.net> (raw)
In-Reply-To: <20190415205242.GA6380@lst.de>
On Mon, Apr 15, 2019 at 10:52:42PM +0200, Christoph Hellwig wrote:
> On Mon, Apr 15, 2019 at 12:44:35PM -0700, Guenter Roeck wrote:
> > This patch causes crashes with various boot tests. Most sparc tests crash, as
> > well as several arm tests. Bisect results in both cases point to this patch.
>
> That just means we trigger an existing bug more easily now. I'll see
> if I can help with the issues.
Code which previously worked reliably no longer does. I would be quite
hesitant to call this "trigger an existing bug more easily". "Regression"
seems to be a more appropriate term - even more so as it seems to cause
'init' crashes, at least on arm.
Guenter
next prev parent reply other threads:[~2019-04-15 21:07 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-08 10:46 avoid calling nth_page in the block I/O path Christoph Hellwig
2019-04-08 10:46 ` [PATCH 1/5] block: rewrite blk_bvec_map_sg to avoid a nth_page call Christoph Hellwig
2019-04-08 14:03 ` Johannes Thumshirn
2019-04-08 22:04 ` Bart Van Assche
2019-04-08 22:51 ` Ming Lei
2019-04-15 19:44 ` Guenter Roeck
2019-04-15 20:52 ` Christoph Hellwig
2019-04-15 21:07 ` Guenter Roeck [this message]
2019-04-16 6:33 ` Christoph Hellwig
2019-04-16 14:09 ` Guenter Roeck
2019-04-16 17:08 ` Guenter Roeck
2019-04-16 17:10 ` Christoph Hellwig
2019-04-16 17:51 ` Guenter Roeck
2019-04-17 5:27 ` Christoph Hellwig
2019-04-17 13:42 ` Guenter Roeck
2019-04-17 21:59 ` Guenter Roeck
2019-04-19 2:27 ` Ming Lei
2019-04-19 2:36 ` Ming Lei
2019-04-08 10:46 ` [PATCH 2/5] block: refactor __bio_iov_bvec_add_pages Christoph Hellwig
2019-04-08 11:07 ` Johannes Thumshirn
2019-04-08 22:06 ` Bart Van Assche
2019-04-08 10:46 ` [PATCH 3/5] block: don't allow multiple bio_iov_iter_get_pages calls per bio Christoph Hellwig
2019-04-08 11:13 ` Johannes Thumshirn
2019-04-08 22:17 ` Bart Van Assche
2019-04-09 10:05 ` Christoph Hellwig
2019-04-08 10:46 ` [PATCH 4/5] block: change how we get page references in bio_iov_iter_get_pages Christoph Hellwig
2019-04-08 10:46 ` [PATCH 5/5] block: only allow contiguous page structs in a bio_vec Christoph Hellwig
2019-04-09 16:15 ` avoid calling nth_page in the block I/O path Jens Axboe
2019-04-11 6:23 avoid calling nth_page in the block I/O path v2 Christoph Hellwig
2019-04-11 6:23 ` [PATCH 1/5] block: rewrite blk_bvec_map_sg to avoid a nth_page call Christoph Hellwig
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