From: Roland Dreier <rdreier@cisco.com>
To: Boaz Harrosh <bharrosh@panasas.com>
Cc: Jens Axboe <jens.axboe@oracle.com>,
FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
chris.mason@oracle.com, david@fromorbit.com, hch@infradead.org,
akpm@linux-foundation.org, jack@suse.cz,
yanmin_zhang@linux.intel.com
Subject: Re: [PATCH 03/13] scsi: unify allocation of scsi command and sense buffer
Date: Mon, 25 May 2009 18:45:25 -0700 [thread overview]
Message-ID: <aday6sk8wne.fsf@cisco.com> (raw)
In-Reply-To: <4A1A64A1.2050409@panasas.com> (Boaz Harrosh's message of "Mon, 25 May 2009 12:28:01 +0300")
> Ideally there should be a MACRO that is defined to WORD_SIZE on cache-coherent
> ARCHs and to SMP_CACHE_BYTES on none-cache-coherent systems and use that size
> at the __align() attribute. (So only stupid ARCHES get hurt)
this seems to come up repeatedly -- I had a proposal a _long_ time ago
that never quite got merged, cf http://lwn.net/Articles/2265/ and
http://lwn.net/Articles/2269/ -- from 2002 (!?). The idea is to go a
step further and create a __dma_buffer annotation for structure members.
Maybe I should resurrect that work one more time?
- R.
next prev parent reply other threads:[~2009-05-26 1:45 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-25 7:30 [PATCH 0/12] Per-bdi writeback flusher threads #5 Jens Axboe
2009-05-25 7:30 ` [PATCH 01/13] libata: get rid of ATA_MAX_QUEUE loop in ata_qc_complete_multiple() Jens Axboe
2009-05-25 7:30 ` [PATCH 01/12] ntfs: remove old debug check for dirty data in ntfs_put_super() Jens Axboe
2009-05-25 7:30 ` [PATCH 02/13] block: add static rq allocation cache Jens Axboe
2009-05-25 7:30 ` [PATCH 02/12] btrfs: properly register fs backing device Jens Axboe
2009-05-25 7:30 ` [PATCH 03/13] scsi: unify allocation of scsi command and sense buffer Jens Axboe
2009-05-25 7:41 ` Christoph Hellwig
2009-05-25 7:46 ` Jens Axboe
2009-05-25 7:50 ` Christoph Hellwig
2009-05-25 7:54 ` Jens Axboe
2009-05-25 10:33 ` Boaz Harrosh
2009-05-25 10:42 ` Christoph Hellwig
2009-05-25 10:49 ` Jens Axboe
2009-05-26 4:36 ` FUJITA Tomonori
2009-05-26 5:08 ` FUJITA Tomonori
2009-05-25 8:15 ` Pekka Enberg
2009-05-25 11:32 ` Nick Piggin
2009-05-25 9:28 ` Boaz Harrosh
2009-05-26 1:45 ` Roland Dreier [this message]
2009-05-26 4:36 ` FUJITA Tomonori
2009-05-26 6:29 ` Jens Axboe
2009-05-26 7:25 ` FUJITA Tomonori
2009-05-26 7:32 ` Jens Axboe
2009-05-26 7:38 ` FUJITA Tomonori
2009-05-26 14:47 ` James Bottomley
2009-05-26 15:13 ` Matthew Wilcox
2009-05-26 15:31 ` FUJITA Tomonori
2009-05-26 16:05 ` Boaz Harrosh
2009-05-27 1:36 ` FUJITA Tomonori
2009-05-27 7:54 ` Boaz Harrosh
2009-05-27 8:26 ` FUJITA Tomonori
2009-05-27 9:11 ` Boaz Harrosh
2009-05-26 16:12 ` Boaz Harrosh
2009-05-26 16:28 ` Boaz Harrosh
2009-05-26 7:56 ` FUJITA Tomonori
2009-05-26 5:23 ` FUJITA Tomonori
2009-05-25 7:30 ` [PATCH 03/12] writeback: move dirty inodes from super_block to backing_dev_info Jens Axboe
2009-05-25 7:30 ` [PATCH 04/13] scsi: get rid of lock in __scsi_put_command() Jens Axboe
2009-05-25 7:30 ` [PATCH 04/12] writeback: switch to per-bdi threads for flushing data Jens Axboe
2009-05-25 7:30 ` [PATCH 05/13] aio: mostly crap Jens Axboe
2009-05-25 9:09 ` Jan Kara
2009-05-25 7:30 ` [PATCH 05/12] writeback: get rid of pdflush completely Jens Axboe
2009-05-25 7:30 ` [PATCH 06/13] block: move elevator ops into the queue Jens Axboe
2009-05-25 7:30 ` [PATCH 06/12] writeback: separate the flushing state/task from the bdi Jens Axboe
2009-05-25 7:30 ` [PATCH 07/13] block: avoid indirect calls to enter cfq io scheduler Jens Axboe
2009-05-26 9:02 ` Nikanth K
2009-05-25 7:30 ` [PATCH 07/12] writeback: support > 1 flusher thread per bdi Jens Axboe
2009-05-25 7:30 ` [PATCH 08/13] block: change the tag sync vs async restriction logic Jens Axboe
2009-05-25 7:30 ` [PATCH 08/12] writeback: include default_backing_dev_info in writeback Jens Axboe
2009-05-25 7:31 ` [PATCH 09/13] libata: switch to using block layer tagging support Jens Axboe
2009-05-25 7:31 ` [PATCH 09/12] writeback: allow sleepy exit of default writeback task Jens Axboe
2009-05-25 7:31 ` [PATCH 10/13] block: add function for waiting for a specific free tag Jens Axboe
2009-05-25 7:31 ` [PATCH 10/12] writeback: add some debug inode list counters to bdi stats Jens Axboe
2009-05-25 7:31 ` [PATCH 11/13] block: disallow merging of read-ahead bits into normal request Jens Axboe
2009-05-25 7:31 ` [PATCH 11/12] writeback: add name to backing_dev_info Jens Axboe
2009-05-25 7:31 ` [PATCH 12/13] block: first cut at implementing a NAPI approach for block devices Jens Axboe
2009-05-25 7:31 ` [PATCH 12/12] writeback: check for registered bdi in flusher add and inode dirty Jens Axboe
2009-05-25 7:31 ` [PATCH 13/13] block: unlocked completion test patch Jens Axboe
2009-05-25 7:33 ` [PATCH 0/12] Per-bdi writeback flusher threads #5 Jens Axboe
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