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From: Stefan Roesch <[email protected]>
To: Dave Chinner <[email protected]>
Cc: [email protected], [email protected], [email protected],
	[email protected], [email protected]
Subject: Re: [RFC PATCH v1 11/18] xfs: add async buffered write support
Date: Thu, 28 Apr 2022 12:58:59 -0700	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>



On 4/26/22 3:56 PM, Dave Chinner wrote:
> On Tue, Apr 26, 2022 at 10:43:28AM -0700, Stefan Roesch wrote:
>> This adds the async buffered write support to XFS. For async buffered
>> write requests, the request will return -EAGAIN if the ilock cannot be
>> obtained immediately.
>>
>> Signed-off-by: Stefan Roesch <[email protected]>
>> ---
>>  fs/xfs/xfs_file.c | 10 ++++++----
>>  1 file changed, 6 insertions(+), 4 deletions(-)
>>
>> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
>> index 6f9da1059e8b..49d54b939502 100644
>> --- a/fs/xfs/xfs_file.c
>> +++ b/fs/xfs/xfs_file.c
>> @@ -739,12 +739,14 @@ xfs_file_buffered_write(
>>  	bool			cleared_space = false;
>>  	int			iolock;
>>  
>> -	if (iocb->ki_flags & IOCB_NOWAIT)
>> -		return -EOPNOTSUPP;
>> -
>>  write_retry:
>>  	iolock = XFS_IOLOCK_EXCL;
>> -	xfs_ilock(ip, iolock);
>> +	if (iocb->ki_flags & IOCB_NOWAIT) {
>> +		if (!xfs_ilock_nowait(ip, iolock))
>> +			return -EAGAIN;
>> +	} else {
>> +		xfs_ilock(ip, iolock);
>> +	}
> 
> xfs_ilock_iocb().
> 

The helper xfs_ilock_iocb cannot be used as it hardcoded to use iocb->ki_filp to
get a pointer to the xfs_inode. However here we need to use iocb->ki_filp->f_mapping->host.
I'll split off new helper for this in the next version of the patch.

> -Dave.
> 

  reply	other threads:[~2022-04-28 19:59 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-26 17:43 [RFC PATCH v1 00/18] io-uring/xfs: support async buffered writes Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 01/18] block: add check for async buffered writes to generic_write_checks Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 02/18] mm: add FGP_ATOMIC flag to __filemap_get_folio() Stefan Roesch
2022-04-26 19:06   ` Matthew Wilcox
2022-04-28 19:54     ` Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 03/18] iomap: add iomap_page_create_gfp to allocate iomap_pages Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 04/18] iomap: use iomap_page_create_gfp() in __iomap_write_begin Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 05/18] iomap: add async buffered write support Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 06/18] xfs: add iomap " Stefan Roesch
2022-04-26 22:54   ` Dave Chinner
2022-04-28 20:03     ` Stefan Roesch
2022-04-28 21:44       ` Dave Chinner
2022-04-26 17:43 ` [RFC PATCH v1 07/18] fs: split off need_remove_file_privs() do_remove_file_privs() Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 08/18] fs: split off need_file_update_time and do_file_update_time Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 09/18] fs: add pending file update time flag Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 10/18] xfs: Enable async write file modification handling Stefan Roesch
2022-04-26 22:55   ` Dave Chinner
2022-04-27 12:07   ` Christian Brauner
2022-04-26 17:43 ` [RFC PATCH v1 11/18] xfs: add async buffered write support Stefan Roesch
2022-04-26 22:56   ` Dave Chinner
2022-04-28 19:58     ` Stefan Roesch [this message]
2022-04-28 21:54       ` Dave Chinner
2022-05-02 21:21         ` Stefan Roesch
2022-05-06  9:29           ` Dave Chinner
2022-05-09 19:32             ` Stefan Roesch
2022-05-09 23:24               ` Dave Chinner
2022-05-09 23:44                 ` Darrick J. Wong
2022-05-10  1:12                   ` Dave Chinner
2022-05-10  6:47                     ` Christoph Hellwig
2022-05-16  2:24                       ` Dave Chinner
2022-05-16 13:39                         ` Christoph Hellwig
2022-04-26 17:43 ` [RFC PATCH v1 12/18] io_uring: add support for async buffered writes Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 13/18] io_uring: add tracepoint for short writes Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 14/18] sched: add new fields to task_struct Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 15/18] mm: support write throttling for async buffered writes Stefan Roesch
2022-04-28 17:47   ` Jan Kara
2022-04-28 20:16     ` Stefan Roesch
2022-05-10  9:50       ` Jan Kara
2022-05-10 20:16         ` Stefan Roesch
2022-05-11 10:38           ` Jan Kara
2022-05-13 18:57             ` Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 16/18] iomap: User " Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 17/18] io_uring: support write " Stefan Roesch
2022-04-26 17:43 ` [RFC PATCH v1 18/18] xfs: enable async buffered write support Stefan Roesch
2022-04-26 22:37 ` [RFC PATCH v1 00/18] io-uring/xfs: support async buffered writes Dave Chinner

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