From: Matthew Wilcox <willy@linux.intel.com>
To: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org,
"Wilcox," Matthew R" <matthew.r.wilcox@intel.com>,
NeilBrown <neilb@suse.com>," linux-nvdimm@lists.01.org
Subject: Re: [PATCH 02/10] radix-tree: make 'indirect' bit available to exception entries.
Date: Tue, 22 Mar 2016 05:27:08 -0400 [thread overview]
Message-ID: <20160322092708.GV23727@linux.intel.com> (raw)
In-Reply-To: <20160322091232.GD4459@quack.suse.cz>
On Tue, Mar 22, 2016 at 10:12:32AM +0100, Jan Kara wrote:
> if (unlikely(!page)) // False since
> // RADIX_TREE_INDIRECT_PTR is set
> if (radix_tree_exception(page)) // False - no exeptional bit
Oops, you got confused:
static inline int radix_tree_exception(void *arg)
{
return unlikely((unsigned long)arg &
(RADIX_TREE_INDIRECT_PTR | RADIX_TREE_EXCEPTIONAL_ENTRY));
}
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WARNING: multiple messages have this Message-ID (diff)
From: Matthew Wilcox <willy@linux.intel.com>
To: Jan Kara <jack@suse.cz>
Cc: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org,
NeilBrown <neilb@suse.com>,
"Wilcox, Matthew R" <matthew.r.wilcox@intel.com>
Subject: Re: [PATCH 02/10] radix-tree: make 'indirect' bit available to exception entries.
Date: Tue, 22 Mar 2016 05:27:08 -0400 [thread overview]
Message-ID: <20160322092708.GV23727@linux.intel.com> (raw)
In-Reply-To: <20160322091232.GD4459@quack.suse.cz>
On Tue, Mar 22, 2016 at 10:12:32AM +0100, Jan Kara wrote:
> if (unlikely(!page)) // False since
> // RADIX_TREE_INDIRECT_PTR is set
> if (radix_tree_exception(page)) // False - no exeptional bit
Oops, you got confused:
static inline int radix_tree_exception(void *arg)
{
return unlikely((unsigned long)arg &
(RADIX_TREE_INDIRECT_PTR | RADIX_TREE_EXCEPTIONAL_ENTRY));
}
next prev parent reply other threads:[~2016-03-22 9:26 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 13:22 [RFC v2] [PATCH 0/10] DAX page fault locking Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-21 13:22 ` [PATCH 01/10] DAX: move RADIX_DAX_ definitions to dax.c Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-21 17:25 ` Matthew Wilcox
2016-03-21 17:25 ` Matthew Wilcox
2016-03-21 13:22 ` [PATCH 02/10] radix-tree: make 'indirect' bit available to exception entries Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-21 17:34 ` Matthew Wilcox
2016-03-21 17:34 ` Matthew Wilcox
2016-03-22 9:12 ` Jan Kara
2016-03-22 9:12 ` Jan Kara
2016-03-22 9:27 ` Matthew Wilcox [this message]
2016-03-22 9:27 ` Matthew Wilcox
2016-03-22 10:37 ` Jan Kara
2016-03-22 10:37 ` Jan Kara
2016-03-23 16:41 ` Ross Zwisler
2016-03-23 16:41 ` Ross Zwisler
2016-03-24 12:31 ` Jan Kara
2016-03-24 12:31 ` Jan Kara
2016-03-21 13:22 ` [PATCH 03/10] dax: Remove complete_unwritten argument Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-23 17:12 ` Ross Zwisler
2016-03-23 17:12 ` Ross Zwisler
2016-03-24 12:32 ` Jan Kara
2016-03-24 12:32 ` Jan Kara
2016-03-21 13:22 ` [PATCH 04/10] dax: Fix data corruption for written and mmapped files Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-23 17:39 ` Ross Zwisler
2016-03-23 17:39 ` Ross Zwisler
2016-03-24 12:51 ` Jan Kara
2016-03-24 12:51 ` Jan Kara
2016-03-29 15:17 ` Ross Zwisler
2016-03-29 15:17 ` Ross Zwisler
2016-03-21 13:22 ` [PATCH 05/10] dax: Allow DAX code to replace exceptional entries Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-23 17:52 ` Ross Zwisler
2016-03-23 17:52 ` Ross Zwisler
2016-03-24 10:42 ` Jan Kara
2016-03-24 10:42 ` Jan Kara
2016-03-21 13:22 ` [PATCH 06/10] dax: Remove redundant inode size checks Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-23 21:08 ` Ross Zwisler
2016-03-23 21:08 ` Ross Zwisler
2016-03-21 13:22 ` [PATCH 07/10] dax: Disable huge page handling Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-23 20:50 ` Ross Zwisler
2016-03-23 20:50 ` Ross Zwisler
2016-03-24 12:56 ` Jan Kara
2016-03-24 12:56 ` Jan Kara
2016-03-21 13:22 ` [PATCH 08/10] dax: New fault locking Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-29 21:57 ` Ross Zwisler
2016-03-29 21:57 ` Ross Zwisler
2016-03-31 16:27 ` Jan Kara
2016-03-31 16:27 ` Jan Kara
2016-03-21 13:22 ` [PATCH 09/10] dax: Use radix tree entry lock to protect cow faults Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-21 19:11 ` Matthew Wilcox
2016-03-21 19:11 ` Matthew Wilcox
2016-03-22 7:03 ` Jan Kara
2016-03-22 7:03 ` Jan Kara
2016-03-29 22:18 ` Ross Zwisler
2016-03-29 22:18 ` Ross Zwisler
2016-03-21 13:22 ` [PATCH 10/10] dax: Remove i_mmap_lock protection Jan Kara
2016-03-21 13:22 ` Jan Kara
2016-03-29 22:17 ` Ross Zwisler
2016-03-29 22:17 ` Ross Zwisler
2016-03-21 17:41 ` [RFC v2] [PATCH 0/10] DAX page fault locking Matthew Wilcox
2016-03-21 17:41 ` Matthew Wilcox
2016-03-23 15:09 ` Jan Kara
2016-03-23 15:09 ` Jan Kara
2016-03-23 20:50 ` Matthew Wilcox
2016-03-23 20:50 ` Matthew Wilcox
2016-03-24 10:00 ` Matthew Wilcox
2016-03-24 10:00 ` Matthew Wilcox
2016-03-22 19:32 ` Ross Zwisler
2016-03-22 19:32 ` Ross Zwisler
2016-03-22 21:07 ` Toshi Kani
2016-03-22 21:07 ` Toshi Kani
2016-03-22 21:15 ` Dave Chinner
2016-03-22 21:15 ` Dave Chinner
2016-03-23 9:45 ` Jan Kara
2016-03-23 9:45 ` Jan Kara
2016-03-23 15:11 ` Toshi Kani
2016-03-23 15:11 ` Toshi Kani
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