From: Greg KH <gregkh@suse.de>
To: linux-kernel@vger.kernel.org, stable@kernel.org, akpm@osdl.org
Cc: Justin Forbes <jmforbes@linuxtx.org>,
Zwane Mwaikambo <zwane@arm.linux.org.uk>,
"Theodore Ts'o" <tytso@mit.edu>,
Randy Dunlap <rdunlap@xenotime.net>,
Dave Jones <davej@redhat.com>,
Chuck Wolber <chuckw@quantumlinux.com>,
Chris Wedgwood <reviews@ml.cw.f00f.org>,
Michael Krufky <mkrufky@linuxtv.org>,
torvalds@osdl.org, alan@lxorguk.ukuu.org.uk,
Suparna Bhattacharya <suparna@in.ibm.com>,
Greg Kroah-Hartman <gregkh@suse.de>
Subject: [patch 08/19] ext3 sequential read regression fix
Date: Tue, 10 Oct 2006 10:14:55 -0700 [thread overview]
Message-ID: <20061010171455.GI6339@kroah.com> (raw)
In-Reply-To: <20061010171350.GA6339@kroah.com>
[-- Attachment #1: ext3-sequential-read-regression-fix.patch --]
[-- Type: text/plain, Size: 1487 bytes --]
-stable review patch. If anyone has any objections, please let us know.
------------------
From: Badari Pulavarty <pbadari@us.ibm.com>
ext3-get-blocks support caused ~20% degrade in Sequential read
performance (tiobench). Problem is with marking the buffer boundary
so IO can be submitted right away. Here is the patch to fix it.
2.6.18-rc6:
-----------
# ./iotest
1048576+0 records in
1048576+0 records out
4294967296 bytes (4.3 GB) copied, 75.2726 seconds, 57.1 MB/s
real 1m15.285s
user 0m0.276s
sys 0m3.884s
2.6.18-rc6 + fix:
-----------------
[root@elm3a241 ~]# ./iotest
1048576+0 records in
1048576+0 records out
4294967296 bytes (4.3 GB) copied, 62.9356 seconds, 68.2 MB/s
The boundary block check in ext3_get_blocks_handle needs to be adjusted
against the count of blocks mapped in this call, now that it can map
more than one block.
Signed-off-by: Suparna Bhattacharya <suparna@in.ibm.com>
Tested-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
fs/ext3/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- linux-2.6.17.13.orig/fs/ext3/inode.c
+++ linux-2.6.17.13/fs/ext3/inode.c
@@ -926,7 +926,7 @@ int ext3_get_blocks_handle(handle_t *han
set_buffer_new(bh_result);
got_it:
map_bh(bh_result, inode->i_sb, le32_to_cpu(chain[depth-1].key));
- if (blocks_to_boundary == 0)
+ if (count > blocks_to_boundary)
set_buffer_boundary(bh_result);
err = count;
/* Clean up and exit */
--
next prev parent reply other threads:[~2006-10-10 17:15 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20061010165621.394703368@quad.kroah.org>
2006-10-10 17:13 ` [patch 00/19] 2.6.17-stable review Greg KH
2006-10-10 17:14 ` [patch 01/19] dvb-core: Proper handling ULE SNDU length of 0 (CVE-2006-4623) Greg KH
2006-10-10 17:14 ` [patch 02/19] NFS: Fix a potential deadlock in nfs_release_page Greg KH
2006-10-10 17:14 ` [patch 03/19] SUNRPC: avoid choosing an IPMI port for RPC traffic Greg KH
2006-10-10 18:59 ` Jan Engelhardt
2006-10-11 23:45 ` Trond Myklebust
2006-10-12 1:12 ` Alan Cox
2006-10-12 1:35 ` Trond Myklebust
2006-10-12 1:53 ` Matt Domsch
2006-10-12 2:04 ` Trond Myklebust
2006-10-12 10:16 ` Alan Cox
2006-10-12 10:15 ` Alan Cox
2006-10-12 15:15 ` Trond Myklebust
2006-10-12 7:58 ` Jan Engelhardt
2006-10-12 8:35 ` Bernd Petrovitsch
2006-10-12 12:28 ` Jan Engelhardt
2006-10-12 15:01 ` Trond Myklebust
2006-10-12 15:49 ` Jan Engelhardt
2006-10-10 17:14 ` [patch 04/19] LOCKD: Fix a deadlock in nlm_traverse_files() Greg KH
2006-10-10 17:14 ` [patch 05/19] NFS: More page cache revalidation fixups Greg KH
2006-10-10 17:14 ` [patch 06/19] Backport: Old IDE, fix SATA detection for cabling Greg KH
2006-10-10 17:14 ` [patch 07/19] invalidate_complete_page() race fix Greg KH
2006-10-10 18:12 ` Hugh Dickins
2006-10-10 19:14 ` [stable] " Greg KH
2006-10-10 19:30 ` Andrew Morton
2006-10-10 17:14 ` Greg KH [this message]
2006-10-10 17:14 ` [patch 09/19] sysfs: remove duplicated dput in sysfs_update_file Greg KH
2006-10-10 17:15 ` [patch 10/19] Video: Fix msp343xG handling regression Greg KH
2006-10-10 17:15 ` [patch 11/19] Video: cx24123: fix PLL divisor setup Greg KH
2006-10-10 17:15 ` [patch 12/19] SPARC64: Fix serious bug in sched_clock() on sparc64 Greg KH
2006-10-10 17:15 ` [patch 13/19] Fix sparc64 ramdisk handling Greg KH
2006-10-10 17:15 ` [patch 14/19] PKT_SCHED: cls_basic: Use unsigned int when generating handle Greg KH
2006-10-10 17:15 ` [patch 15/19] xirc2ps_cs: Cannot reset card in atomic context Greg KH
2006-10-10 17:15 ` [patch 16/19] Add PIIX4 APCI quirk for the 440MX chipset too Greg KH
2006-10-10 17:15 ` [patch 17/19] MMC: Always use a sector size of 512 bytes Greg KH
2006-10-10 17:15 ` [patch 18/19] ahci: do not fail softreset if PHY reports no device Greg KH
2006-10-10 17:15 ` [patch 19/19] Input: logips2pp - fix button mapping for MX300 Greg KH
2006-10-10 17:59 ` [stable] [patch 00/19] 2.6.17-stable review Greg KH
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