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From: Stefan Roesch <[email protected]>
To: Jens Axboe <[email protected]>, Dave Chinner <[email protected]>
Cc: [email protected], [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected]
Subject: Re: [PATCH v7 00/15] io-uring/xfs: support async buffered writes
Date: Tue, 7 Jun 2022 09:41:34 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>



On 6/3/22 6:04 AM, Jens Axboe wrote:
> On 6/2/22 8:43 PM, Dave Chinner wrote:
>> On Thu, Jun 02, 2022 at 02:09:00AM -0600, Jens Axboe wrote:
>>> On 6/1/22 3:01 PM, Stefan Roesch wrote:
>>>> This patch series adds support for async buffered writes when using both
>>>> xfs and io-uring. Currently io-uring only supports buffered writes in the
>>>> slow path, by processing them in the io workers. With this patch series it is
>>>> now possible to support buffered writes in the fast path. To be able to use
>>>> the fast path the required pages must be in the page cache, the required locks
>>>> in xfs can be granted immediately and no additional blocks need to be read
>>>> form disk.
>>>
>>> This series looks good to me now, but will need some slight rebasing
>>> since the 5.20 io_uring branch has split up the code a bit. Trivial to
>>> do though, I suspect it'll apply directly if we just change
>>> fs/io_uring.c to io_uring/rw.c instead.
>>>
>>> The bigger question is how to stage this, as it's touching a bit of fs,
>>> mm, and io_uring...
>>
>> What data integrity testing has this had? Has it been run through a
>> few billion fsx operations with w/ io_uring read/write enabled?
> 
> I'll let Stefan expand on this, but just mention what I know - it has
> been fun via fio at least. Each of the performance tests were hour long
> each, and also specific test cases were written to test the boundary
> conditions of what pages of a range where in page cache, etc. Also with
> data verification.
> 

I performed the following tests:
- fio tests with various block sizes and different modes (psysnc, io_uring, libaio)
- fsx tests with one billion ops
- individual test program
  - to test with different block sizes
  - test short writes
  - test holes
  - test without readahead

> Don't know if fsx specifically has been used it.
> 

      reply	other threads:[~2022-06-07 16:42 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-01 21:01 [PATCH v7 00/15] io-uring/xfs: support async buffered writes Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 01/15] mm: Move starting of background writeback into the main balancing loop Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 02/15] mm: Move updates of dirty_exceeded into one place Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 03/15] mm: Add balance_dirty_pages_ratelimited_flags() function Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 04/15] iomap: Add flags parameter to iomap_page_create() Stefan Roesch
2022-06-02 16:26   ` Darrick J. Wong
2022-06-01 21:01 ` [PATCH v7 05/15] iomap: Add async buffered write support Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 06/15] iomap: Return error code from iomap_write_iter() Stefan Roesch
2022-06-02 12:38   ` Matthew Wilcox
2022-06-02 17:08     ` Stefan Roesch
2022-06-06 16:39     ` Stefan Roesch
2022-06-06 19:18       ` Matthew Wilcox
2022-06-06 19:21         ` Stefan Roesch
2022-06-06 19:25           ` Matthew Wilcox
2022-06-06 19:28             ` Stefan Roesch
2022-06-06 20:30               ` Matthew Wilcox
2022-06-06 20:34                 ` Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 07/15] fs: Add check for async buffered writes to generic_write_checks Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 08/15] fs: add __remove_file_privs() with flags parameter Stefan Roesch
2022-06-02  9:04   ` Jan Kara
2022-06-01 21:01 ` [PATCH v7 09/15] fs: Split off inode_needs_update_time and __file_update_time Stefan Roesch
2022-06-02  8:44   ` Jan Kara
2022-06-02 12:57   ` Matthew Wilcox
2022-06-02 21:04     ` Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 10/15] fs: Add async write file modification handling Stefan Roesch
2022-06-02  8:44   ` Jan Kara
2022-06-02  9:06   ` Jan Kara
2022-06-02 21:00     ` Stefan Roesch
2022-06-03 10:12       ` Jan Kara
2022-06-06 16:35         ` Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 11/15] fs: Optimization for concurrent file time updates Stefan Roesch
2022-06-02  8:59   ` Jan Kara
2022-06-02 21:06     ` Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 12/15] io_uring: Add support for async buffered writes Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 13/15] io_uring: Add tracepoint for short writes Stefan Roesch
2022-06-01 21:01 ` [PATCH v7 14/15] xfs: Specify lockmode when calling xfs_ilock_for_iomap() Stefan Roesch
2022-06-02 16:25   ` Darrick J. Wong
2022-06-01 21:01 ` [PATCH v7 15/15] xfs: Add async buffered write support Stefan Roesch
2022-07-01  4:39   ` Al Viro
2022-07-01 14:19     ` Jens Axboe
2022-07-01 14:30       ` Jens Axboe
2022-07-01 14:38         ` Jens Axboe
2022-07-01 18:05           ` Darrick J. Wong
2022-07-01 18:14             ` Jens Axboe
2022-07-05 13:47               ` Josef Bacik
2022-07-05 14:23                 ` Goldwyn Rodrigues
2022-07-05 16:11                 ` Christoph Hellwig
2022-06-02  8:09 ` [PATCH v7 00/15] io-uring/xfs: support async buffered writes Jens Axboe
2022-06-03  2:43   ` Dave Chinner
2022-06-03 13:04     ` Jens Axboe
2022-06-07 16:41       ` Stefan Roesch [this message]

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