From: Fengguang Wu <wfg@mail.ustc.edu.cn>
To: Jens Axboe <axboe@suse.de>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Lubos Lunak <l.lunak@suse.cz>,
Wu Fengguang <wfg@mail.ustc.edu.cn>
Subject: [PATCH 1/7] iosched: introduce WRITEA
Date: Sat, 24 Jun 2006 16:20:07 +0800 [thread overview]
Message-ID: <351137381.34985@ustc.edu.cn> (raw)
Message-ID: <20060624082310.253199615@localhost.localdomain> (raw)
In-Reply-To: 20060624082006.574472632@localhost.localdomain
[-- Attachment #1: iosched-reada-redef.patch --]
[-- Type: text/plain, Size: 911 bytes --]
Introduce WRITEA as 3, and redefine SWRITE as 5.
I'm not sure if WRITEA will ever be used, though it would be better to
redefine SWRITE to avoid possible conflict with BIO_RW_AHEAD.
Signed-off-by: Wu Fengguang <wfg@mail.ustc.edu.cn>
---
--- linux-2.6.17-rc6-mm2.orig/include/linux/fs.h
+++ linux-2.6.17-rc6-mm2/include/linux/fs.h
@@ -74,8 +74,9 @@ extern int dir_notify_enable;
#define READ 0
#define WRITE 1
#define READA 2 /* read-ahead - don't block if no resources */
-#define SWRITE 3 /* for ll_rw_block() - wait for buffer lock */
+#define WRITEA 3 /* write-ahead - don't block if no resources */
#define SPECIAL 4 /* For non-blockdevice requests in request queue */
+#define SWRITE 5 /* for ll_rw_block() - wait for buffer lock */
#define READ_SYNC (READ | (1 << BIO_RW_SYNC))
#define WRITE_SYNC (WRITE | (1 << BIO_RW_SYNC))
#define WRITE_BARRIER ((1 << BIO_RW) | (1 << BIO_RW_BARRIER))
--
next prev parent reply other threads:[~2006-06-24 8:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060624082006.574472632@localhost.localdomain>
2006-06-24 8:20 ` [PATCH 0/7] [RFC] iosched: make a difference between read/readahead requests Fengguang Wu
[not found] ` <20060624082310.253199615@localhost.localdomain>
2006-06-24 8:20 ` Fengguang Wu [this message]
[not found] ` <20060624082311.501730089@localhost.localdomain>
2006-06-24 8:20 ` [PATCH 4/7] iosched: submit READA requests on possible readahead code path Fengguang Wu
[not found] ` <20060624082311.912265883@localhost.localdomain>
2006-06-24 8:20 ` [PATCH 5/7] iosched: introduce elv_kick_page() Fengguang Wu
[not found] ` <20060624082312.833976992@localhost.localdomain>
2006-06-24 8:20 ` [PATCH 7/7] iosched: introduce deadline_kick_page() Fengguang Wu
2006-06-24 11:01 ` Jens Axboe
[not found] ` <20060625063232.GA5867@mail.ustc.edu.cn>
2006-06-25 6:32 ` Fengguang Wu
2006-06-28 11:27 ` Jens Axboe
[not found] ` <20060704013248.GA7333@mail.ustc.edu.cn>
2006-07-04 1:32 ` Fengguang Wu
[not found] <20060625071036.241325936@localhost.localdomain>
[not found] ` <20060625071729.008111818@localhost.localdomain>
2006-06-25 7:10 ` [PATCH 1/7] iosched: introduce WRITEA Fengguang Wu
[not found] <20060624020358.719251923@localhost.localdomain>
[not found] ` <20060624024257.216415573@localhost.localdomain>
2006-06-24 2:03 ` Fengguang Wu
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