From: Jan Kara <jack@suse.cz>
To: Christoph Hellwig <hch@infradead.org>
Cc: Jan Kara <jack@suse.cz>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
linux-nvdimm@ml01.01.org, Dan Williams <dan.j.williams@intel.com>,
Ross Zwisler <ross.zwisler@linux.intel.com>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [PATCH 0/20 v3] dax: Clear dirty bits after flushing caches
Date: Mon, 3 Oct 2016 09:59:02 +0200 [thread overview]
Message-ID: <20161003075902.GG6457@quack2.suse.cz> (raw)
In-Reply-To: <20160930091418.GC24352@infradead.org>
On Fri 30-09-16 02:14:18, Christoph Hellwig wrote:
> On Tue, Sep 27, 2016 at 06:08:04PM +0200, Jan Kara wrote:
> > Hello,
> >
> > this is a third revision of my patches to clear dirty bits from radix tree of
> > DAX inodes when caches for corresponding pfns have been flushed. This patch set
> > is significantly larger than the previous version because I'm changing how
> > ->fault, ->page_mkwrite, and ->pfn_mkwrite handlers may choose to handle the
> > fault
>
> Btw, is there ny good reason to keep ->fault, ->pmd_fault, page->mkwrite
> and pfn_mkwrite separate these days? All of them now take a struct
> vm_fault, and the differences aren't exactly obvious for callers and
> users.
IMO ->fault and ->pmd_fault can be merged, ->page_mkwrite and ->pfn_mkwrite
can be merged. There were even patches flying around for that. I want to do
that but it's not a priority now as the patch set it already large enough.
I'm not sure whether merging ->fault and ->page_mkwrite would be really
helpful and it would certainly require some non-trivial changes in the
fault path. For example currently a write fault of a file mapping will
result in first ->fault being called which handles the read part of the
fault and then ->page_mkwrite is called to handle write-enabling of the
PTE. When the handlers would be merged, calling one handler twice would be
really strange.
Honza
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
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next prev parent reply other threads:[~2016-10-03 7:59 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-27 16:08 Jan Kara
2016-09-27 16:08 ` [PATCH 01/20] mm: Change type of vmf->virtual_address Jan Kara
2016-09-30 9:07 ` Christoph Hellwig
2016-10-14 18:02 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 02/20] mm: Join struct fault_env and vm_fault Jan Kara
2016-09-30 9:10 ` Christoph Hellwig
2016-10-03 7:43 ` Jan Kara
2016-09-27 16:08 ` [PATCH 03/20] mm: Use pgoff in struct vm_fault instead of passing it separately Jan Kara
2016-10-14 18:42 ` Ross Zwisler
2016-10-17 9:01 ` Jan Kara
2016-09-27 16:08 ` [PATCH 04/20] mm: Use passed vm_fault structure in __do_fault() Jan Kara
2016-10-14 19:05 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 05/20] mm: Trim __do_fault() arguments Jan Kara
2016-10-14 20:31 ` Ross Zwisler
2016-10-17 9:04 ` Jan Kara
2016-09-27 16:08 ` [PATCH 06/20] mm: Use pass vm_fault structure for in wp_pfn_shared() Jan Kara
2016-10-14 21:04 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 07/20] mm: Add orig_pte field into vm_fault Jan Kara
2016-10-17 16:45 ` Ross Zwisler
2016-10-18 10:13 ` Jan Kara
2016-09-27 16:08 ` [PATCH 08/20] mm: Allow full handling of COW faults in ->fault handlers Jan Kara
2016-10-17 16:50 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 09/20] mm: Factor out functionality to finish page faults Jan Kara
2016-10-17 17:38 ` Ross Zwisler
2016-10-17 17:40 ` Ross Zwisler
2016-10-18 9:44 ` Jan Kara
2016-09-27 16:08 ` [PATCH 10/20] mm: Move handling of COW faults into DAX code Jan Kara
2016-10-17 19:29 ` Ross Zwisler
2016-10-18 10:32 ` Jan Kara
2016-09-27 16:08 ` [PATCH 11/20] mm: Remove unnecessary vma->vm_ops check Jan Kara
2016-10-17 19:40 ` Ross Zwisler
2016-10-18 10:37 ` Jan Kara
2016-09-27 16:08 ` [PATCH 12/20] mm: Factor out common parts of write fault handling Jan Kara
2016-10-17 22:08 ` Ross Zwisler
2016-10-18 10:50 ` Jan Kara
2016-10-18 17:32 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 13/20] mm: Pass vm_fault structure into do_page_mkwrite() Jan Kara
2016-10-17 22:29 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 14/20] mm: Use vmf->page during WP faults Jan Kara
2016-10-18 17:56 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 15/20] mm: Move part of wp_page_reuse() into the single call site Jan Kara
2016-10-18 17:59 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 16/20] mm: Provide helper for finishing mkwrite faults Jan Kara
2016-10-18 18:35 ` Ross Zwisler
2016-10-19 7:16 ` Jan Kara
2016-10-19 17:21 ` Ross Zwisler
2016-10-20 8:48 ` Jan Kara
2016-09-27 16:08 ` [PATCH 17/20] mm: Export follow_pte() Jan Kara
2016-10-18 18:37 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 18/20] dax: Make cache flushing protected by entry lock Jan Kara
2016-10-18 19:20 ` Ross Zwisler
2016-10-19 7:19 ` Jan Kara
2016-10-19 18:25 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 19/20] dax: Protect PTE modification on WP fault by radix tree " Jan Kara
2016-10-18 19:53 ` Ross Zwisler
2016-10-19 7:25 ` Jan Kara
2016-10-19 17:25 ` Ross Zwisler
2016-09-27 16:08 ` [PATCH 20/20] dax: Clear dirty entry tags on cache flush Jan Kara
2016-10-18 22:12 ` Ross Zwisler
2016-10-19 7:30 ` Jan Kara
2016-10-19 16:38 ` Ross Zwisler
2016-09-30 9:14 ` [PATCH 0/20 v3] dax: Clear dirty bits after flushing caches Christoph Hellwig
2016-10-03 7:59 ` Jan Kara [this message]
2016-10-03 8:03 ` Christoph Hellwig
2016-10-03 8:15 ` Jan Kara
2016-10-03 9:32 ` Christoph Hellwig
2016-10-03 11:13 ` Jan Kara
2016-10-13 20:34 ` Ross Zwisler
2016-10-17 8:47 ` Jan Kara
2016-10-17 18:59 ` Ross Zwisler
2016-10-18 9:49 ` Jan Kara
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