From: Christoph Hellwig <hch@lst.de>
To: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org
Subject: Re: [PATCH 8/8] block: never take page references for ITER_BVEC
Date: Tue, 7 May 2019 08:09:00 +0200 [thread overview]
Message-ID: <20190507060900.GA27680@lst.de> (raw)
In-Reply-To: <20190506133027.GA5810@lst.de>
On Mon, May 06, 2019 at 03:30:27PM +0200, Christoph Hellwig wrote:
> On Mon, May 06, 2019 at 04:19:54PM +0800, Ming Lei wrote:
> > I remember that this way is the initial version of Jens' patch, however
> > kernel bug is triggered:
> >
> > https://lore.kernel.org/linux-block/20190226034613.GA676@sol.localdomain/
> >
> > Or maybe I miss some recent changes, could you explain it a bit?
>
> I'm not even sure how the original would crash.. When I run the
> rest locally it gets and EBUSY from ioctl LOOP_SET_FD, so I'm
> not sure what it tends up testing in the end.
I also did another run with KASAN enabled and a clean environment,
this gives no EBUSY and still works fine. I still don't understand
what the original problem might have been here, though.
next prev parent reply other threads:[~2019-05-07 6:09 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-02 23:33 cleanup bio page releasing and fix a page leak Christoph Hellwig
2019-05-02 23:33 ` [PATCH 1/8] block: move the BIO_NO_PAGE_REF check into bio_release_pages Christoph Hellwig
2019-05-04 12:28 ` Johannes Thumshirn
2019-05-02 23:33 ` [PATCH 2/8] block: use bio_release_pages in bio_unmap_user Christoph Hellwig
2019-05-03 6:50 ` Nikolay Borisov
2019-05-03 7:20 ` Christoph Hellwig
2019-05-02 23:33 ` [PATCH 3/8] block: use bio_release_pages in bio_map_user_iov Christoph Hellwig
2019-05-04 12:31 ` Johannes Thumshirn
2019-05-02 23:33 ` [PATCH 4/8] iomap: use bio_release_pages in iomap_dio_bio_end_io Christoph Hellwig
2019-05-04 12:33 ` Johannes Thumshirn
2019-05-04 12:35 ` Johannes Thumshirn
2019-05-02 23:33 ` [PATCH 5/8] block_dev: use bio_release_pages in blkdev_bio_end_io Christoph Hellwig
2019-05-04 12:35 ` Johannes Thumshirn
2019-05-02 23:33 ` [PATCH 6/8] block_dev: use bio_release_pages in __blkdev_direct_IO_simple Christoph Hellwig
2019-05-04 17:38 ` Johannes Thumshirn
2019-05-02 23:33 ` [PATCH 7/8] direct-io: use bio_release_pages in dio_bio_complete Christoph Hellwig
2019-05-04 17:39 ` Johannes Thumshirn
2019-05-02 23:33 ` [PATCH 8/8] block: never take page references for ITER_BVEC Christoph Hellwig
2019-05-04 17:41 ` Johannes Thumshirn
2019-05-06 8:19 ` Ming Lei
2019-05-06 13:30 ` Christoph Hellwig
2019-05-07 6:09 ` Christoph Hellwig [this message]
2019-05-03 17:52 ` cleanup bio page releasing and fix a page leak Jens Axboe
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