From: Mark Tinguely <tinguely@sgi.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Subject: Re: [PATCH 50/50] xfs: use reference counts to free clean buffer items
Date: Wed, 14 Aug 2013 08:26:20 -0500 [thread overview]
Message-ID: <520B857C.9050607@sgi.com> (raw)
In-Reply-To: <20130814035738.GD6023@dastard>
On 08/13/13 22:57, Dave Chinner wrote:
> On Tue, Aug 13, 2013 at 05:00:25PM -0500, Mark Tinguely wrote:
>> On 08/13/13 16:46, Dave Chinner wrote:
>>> On Tue, Aug 13, 2013 at 10:03:19AM -0500, Mark Tinguely wrote:
>>>> On 08/12/13 05:50, Dave Chinner wrote:
>>>>> From: Dave Chinner<dchinner@redhat.com>
>>>>>
>>>>> When a transaction is cancelled and the buffer log item is clean in
>>
>> ...
>>
>>>>
>>>> why is a clean buffer on the AIL? Racing with a completion handler?
>>>
>>> "clean" means that it wasn't dirtied in the transaction - it can be
>>> in the AIL and holding a reference count that way.
>>
>> I am wondering because it should not have made it into the CIL if it
>> was not dirtied in a transaction - at least according to the the log
>> item descriptor flag at least.
>
> CIL != AIL. IOWs, the bli_refcount going to zero doesn't always
> mean the bli should be freed. All a zero value means is that it is
> not tracked by any transaction. If the item is not going to be
> placed in the AIL (or not already in the AIL) then it can be
> released (freed). Clean or aborted items are not going into the AIL,
> so they can be freed immeidately. Everything else needs to avoid
> freeing the item until the correct state is reached, even if the ref
> count goes to zero.
>
yep.
You are saying that the problem is releasing a buffer that is clean and
also in the AIL, I am just trying to figure out if you are fixing a
symptom or the problem.
--Mark.
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next prev parent reply other threads:[~2013-08-14 13:26 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-12 10:49 ***** SUSPECTED SPAM ***** [PATCH 00/50] xfs: patches for 3.12 Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 01/50] xfs: separate out log format definitions Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 02/50] xfs: split out inode log item format definition Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 03/50] xfs: split out buf log item format definitions Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 04/50] xfs: split out EFI/EFD log item format definition Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 05/50] xfs: separate dquot on disk format definitions out of xfs_quota.h Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 06/50] xfs: separate icreate log format definitions from xfs_icreate_item.h Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 07/50] xfs: split out on-disk transaction definitions Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 08/50] xfs: introduce xfs_rtalloc_defs.h Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 09/50] xfs: introduce xfs_quota_defs.h Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 10/50] xfs: sync minor header differences needed by userspace Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 11/50] xfs: split out transaction reservation code Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 12/50] xfs: move inode fork definitions to a new header file Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 13/50] xfs: move unrelated definitions out of xfs_inode.h Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 14/50] xfs: introduce xfs_inode_buf.c for inode buffer operations Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 15/50] xfs: move getdents code into it's own file Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 16/50] xfs: reshuffle dir2 definitions around for userspace Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 17/50] xfs: split out attribute listing code into separate file Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 18/50] xfs: split out attribute fork truncation " Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 19/50] xfs: split out the remote symlink handling Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 20/50] xfs: introduce xfs_sb.c for sharing with libxfs Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 21/50] xfs: create xfs_bmap_util.[ch] Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 22/50] xfs: minor cleanups Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 23/50] xfs: fix issues that cause userspace warnings Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 24/50] xfs: kill xfs_vnodeops.[ch] Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 25/50] xfs: consolidate xfs_rename.c Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 26/50] xfs: consolidate xfs_utils.c Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 27/50] xfs: consolidate extent swap code Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 28/50] xfs: don't special case shared superblock mounts Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 29/50] xfs: kill __KERNEL__ check for debug code in allocation code Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 30/50] xfs: remove __KERNEL__ from debug code Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 31/50] xfs: remove __KERNEL__ check from xfs_dir2_leaf.c Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 32/50] xfs: xfs_filestreams.h doesn't need __KERNEL__ Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 33/50] xfs: move kernel specific type definitions to xfs.h Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 34/50] xfs: make struct xfs_perag kernel only Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 35/50] xfs: Introduce a new structure to hold transaction reservation items Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 36/50] xfs: Introduce tr_fsyncts to m_reservation Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 37/50] xfs: Make writeid transaction use tr_writeid Dave Chinner
2013-08-12 10:49 ` ***** SUSPECTED SPAM ***** [PATCH 38/50] xfs: refactor xfs_trans_reserve() interface Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 39/50] xfs: Get rid of all XFS_XXX_LOG_RES() macro Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 40/50] xfs: Refactor xfs_ticket_alloc() to extract a new helper Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 41/50] xfs: Add xfs_log_rlimit.c Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 42/50] xfs: Validate log space at mount time Dave Chinner
2013-08-12 18:46 ` Mark Tinguely
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 43/50] xfs: return log item size in IOP_SIZE Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 44/50] xfs: Reduce allocations during CIL insertion Dave Chinner
2013-08-13 13:28 ` Mark Tinguely
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 45/50] xfs: avoid CIL allocation during insert Dave Chinner
2013-08-13 13:37 ` Mark Tinguely
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 46/50] xfs: Combine CIL insert and prepare passes Dave Chinner
2013-08-13 14:02 ` Mark Tinguely
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 47/50] xfs: split the CIL lock Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 48/50] xfs: Add read-only support for dirent filetype field Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 49/50] xfs: Add write " Dave Chinner
2013-08-12 10:50 ` ***** SUSPECTED SPAM ***** [PATCH 50/50] xfs: use reference counts to free clean buffer items Dave Chinner
2013-08-13 15:03 ` Mark Tinguely
2013-08-13 21:46 ` Dave Chinner
2013-08-13 22:00 ` Mark Tinguely
2013-08-14 3:57 ` Dave Chinner
2013-08-14 4:12 ` Zhi Yong Wu
2013-08-14 6:41 ` Dave Chinner
2013-08-14 13:26 ` Mark Tinguely [this message]
2013-08-14 17:49 ` Mark Tinguely
2013-08-15 0:48 ` Dave Chinner
2013-08-15 21:43 ` ***** SUSPECTED SPAM ***** " Ben Myers
2013-08-12 22:55 ` ***** SUSPECTED SPAM ***** [PATCH 00/50] xfs: patches for 3.12 Ben Myers
2013-08-13 21:28 ` Ben Myers
2013-08-19 20:19 ` [PATCH 51/50] xfs: add xfs sb v4 support for dirent filetype field Mark Tinguely
2013-08-19 23:28 ` Eric Sandeen
2013-08-20 14:29 ` Mark Tinguely
2013-08-20 14:45 ` Eric Sandeen
2013-08-20 18:50 ` Ben Myers
2013-08-20 21:00 ` Mark Tinguely
2013-08-20 21:05 ` Ben Myers
2013-08-20 23:19 ` Dave Chinner
2013-08-21 0:06 ` Dave Chinner
2013-08-21 17:03 ` Ben Myers
2013-08-22 2:02 ` Dave Chinner
2013-08-22 16:14 ` Geoffrey Wehrman
2013-08-22 18:19 ` Ben Myers
2013-08-25 5:18 ` Michael L. Semon
2013-08-25 23:21 ` Michael L. Semon
2013-08-26 15:40 ` Mark Tinguely
2013-08-19 23:40 ` Dave Chinner
2013-08-20 19:57 ` Geoffrey Wehrman
2013-08-22 15:59 ` ***** SUSPECTED SPAM ***** [PATCH 00/50] xfs: patches for 3.12 Ben Myers
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