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From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@lst.de>
Cc: "Darrick J . Wong" <darrick.wong@oracle.com>,
	Damien Le Moal <Damien.LeMoal@wdc.com>,
	Andreas Gruenbacher <agruenba@redhat.com>,
	linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 06/12] xfs: remove XFS_TRANS_NOFS
Date: Tue, 25 Jun 2019 08:59:04 +1000	[thread overview]
Message-ID: <20190624225904.GB7777@dread.disaster.area> (raw)
In-Reply-To: <20190624055253.31183-7-hch@lst.de>

On Mon, Jun 24, 2019 at 07:52:47AM +0200, Christoph Hellwig wrote:
> Instead of a magic flag for xfs_trans_alloc, just ensure all callers
> that can't relclaim through the file system use memalloc_nofs_save to
> set the per-task nofs flag.

I'm thinking that it would be a good idea to add comments to explain
exactly what the memalloc_nofs_save/restore() are protecting where
they are used. Right now the XFS_TRANS_NOFS flag is largely
undocumented, so a reader is left guessing as to why the flag is
necessary and what contexts it may apply to. Hence I think we should
fix that while we are changing over to a different GFP_NOFS
allocation context mechanism....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

  parent reply	other threads:[~2019-06-24 23:00 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-24  5:52 lift the xfs writepage code into iomap Christoph Hellwig
2019-06-24  5:52 ` [PATCH 01/12] list.h: add a list_pop helper Christoph Hellwig
2019-06-24 14:53   ` Darrick J. Wong
2019-06-24 15:51   ` Matthew Wilcox
2019-06-25 10:06     ` Christoph Hellwig
2019-06-24  5:52 ` [PATCH 02/12] xfs: simplify xfs_chain_bio Christoph Hellwig
2019-06-24 15:14   ` Darrick J. Wong
2019-06-24  5:52 ` [PATCH 03/12] xfs: fix a comment typo in xfs_submit_ioend Christoph Hellwig
2019-06-24 14:53   ` Darrick J. Wong
2019-06-24  5:52 ` [PATCH 04/12] xfs: initialize ioma->flags in xfs_bmbt_to_iomap Christoph Hellwig
2019-06-24 14:57   ` Darrick J. Wong
2019-06-25 10:07     ` Christoph Hellwig
2019-06-25 15:13       ` Darrick J. Wong
2019-06-25 15:21         ` Christoph Hellwig
2019-06-24  5:52 ` [PATCH 05/12] xfs: use a struct iomap in xfs_writepage_ctx Christoph Hellwig
2019-06-24 15:50   ` Darrick J. Wong
2019-06-24  5:52 ` [PATCH 06/12] xfs: remove XFS_TRANS_NOFS Christoph Hellwig
2019-06-24 15:58   ` Darrick J. Wong
2019-06-24 22:59   ` Dave Chinner [this message]
2019-06-25 10:12     ` Christoph Hellwig
2019-06-24  5:52 ` [PATCH 07/12] xfs: don't preallocate a transaction for file size updates Christoph Hellwig
2019-06-24 16:17   ` Darrick J. Wong
2019-06-24 23:15     ` Dave Chinner
2019-06-25 10:25       ` Christoph Hellwig
2019-06-27 22:23         ` Dave Chinner
2019-06-24  5:52 ` [PATCH 08/12] xfs: simplify xfs_ioend_can_merge Christoph Hellwig
2019-06-24 16:00   ` Darrick J. Wong
2019-06-24  5:52 ` [PATCH 09/12] xfs: refactor the ioend merging code Christoph Hellwig
2019-06-24 16:04   ` Darrick J. Wong
2019-06-24 16:06   ` Nikolay Borisov
2019-06-25 10:14     ` Christoph Hellwig
2019-06-25 12:42       ` Nikolay Borisov
2019-06-25 14:45         ` Darrick J. Wong
2019-06-24  5:52 ` [PATCH 10/12] xfs: remove the fork fields in the writepage_ctx and ioend Christoph Hellwig
2019-06-24 16:08   ` Darrick J. Wong
2019-06-24  5:52 ` [PATCH 11/12] iomap: move the xfs writeback code to iomap.c Christoph Hellwig
2019-06-24 15:46   ` Darrick J. Wong
2019-06-25 10:08     ` Christoph Hellwig
2019-06-24 23:43   ` Dave Chinner
2019-06-25 10:10     ` Christoph Hellwig
2019-06-28  0:45       ` Dave Chinner
2019-06-28  5:33         ` Christoph Hellwig
2019-07-01  0:08           ` Dave Chinner
2019-07-01  6:43             ` Christoph Hellwig
2019-07-01 23:09               ` Dave Chinner
2019-06-28 22:27         ` Luis Chamberlain
2019-07-11 21:31           ` Brendan Higgins
2019-06-24  5:52 ` [PATCH 12/12] iomap: add tracing for the address space operations Christoph Hellwig
2019-06-24 23:49   ` Dave Chinner
2019-06-25 10:15     ` Christoph Hellwig
2019-06-25 14:47       ` Darrick J. Wong
2019-06-27 22:35       ` Dave Chinner

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