From: Pat LaVarre <p.lavarre@ieee.org>
To: linux-fsdevel@vger.kernel.org
Subject: Re: zeroes read back more often than appended
Date: 26 Nov 2003 17:45:04 -0700 [thread overview]
Message-ID: <1069893904.4318.18.camel@patrh9> (raw)
In-Reply-To: <1069346480.6663.37.camel@patrh9>
No improvement in 2.6.0-test10 with CONFIG_SMP = CONFIG_PREEMPT = default = on.
$ uname -msr
Linux 2.6.0-test10 i686
$
$ date ; time fswhd 0 768 mkudffs 0xFF600 0xC8 0x1
Wed Nov 26 17:03:48 MST 2003
Linux 2.6.0-test10 i686
/home/pat
dd if=/dev/zero of=dd.bin bs=1M seek=0 count=768 2>/dev/null
-rw-rw-r-- 1 pat pat 805306368 Nov 26 17:04 dd.bin
mkudffs 1.0.0b2 for UDF FS 1.0.0-cvs, 2002/02/09
0
hexdump -C whd0.bin | head -3
00000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
*
01f91000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
+++ 2.dmesg 2003-11-26 17:05:38.838645504 -0700
+mplete Error }
+UDF-fs DEBUG fs/udf/balloc.c:192:udf_bitmap_free_blocks: bit 2728 already set
+UDF-fs DEBUG fs/udf/balloc.c:193:udf_bitmap_free_blocks: byte= 1
+UDF-fs DEBUG fs/udf/balloc.c:192:udf_bitmap_free_blocks: bit 2728 already set
real 2m15.777s
user 0m2.438s
sys 0m6.433s
$
$ date ; time fswhd 0 768 mkudffs 0xFF600 0xC8 0x2
Wed Nov 26 17:07:38 MST 2003
Linux 2.6.0-test10 i686
/home/pat
dd if=/dev/zero of=dd.bin bs=1M seek=0 count=768 2>/dev/null
-rw-rw-r-- 1 pat pat 805306368 Nov 26 17:12 dd.bin
mkudffs 1.0.0b2 for UDF FS 1.0.0-cvs, 2002/02/09
0
hexdump -C whd0.bin | head -3
00000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
*
01ff0000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
hexdump -C whd1.bin | head -3
00000000 aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa |................|
*
02ffb000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
+++ 2.dmesg 2003-11-26 17:17:52.278145752 -0700
+logicalvol: FileSet found in LogicalVolDesc at block=24, partition=0
+UDF-fs DEBUG fs/udf/balloc.c:192:udf_bitmap_free_blocks: bit 13358 already set
+UDF-fs DEBUG fs/udf/balloc.c:193:udf_bitmap_free_blocks: byte=40
+UDF-fs DEBUG fs/udf/balloc.c:192:udf_bitmap_free_blocks: bit 13358 already set
real 10m28.744s
user 0m7.642s
sys 0m10.885s
$
next prev parent reply other threads:[~2003-11-27 0:45 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-20 16:41 zeroes read back more often than appended Pat LaVarre
2003-11-27 0:45 ` Pat LaVarre [this message]
2003-11-28 18:20 ` Pat LaVarre
2003-11-28 18:29 ` Pat LaVarre
-- strict thread matches above, loose matches on Subject: below --
2003-12-11 18:42 Pat LaVarre
2003-10-07 19:02 Pat LaVarre
2003-10-07 20:54 ` Pat LaVarre
2003-10-08 3:49 ` Ben Fennema
2003-10-08 16:41 ` Pat LaVarre
2003-10-08 17:02 ` Pat LaVarre
2003-10-08 17:21 ` Pat LaVarre
2003-10-08 20:32 ` Pat LaVarre
2003-10-09 20:54 ` Pat LaVarre
2003-10-10 0:52 ` Pat LaVarre
2003-10-10 16:39 ` Pat LaVarre
2003-10-10 18:15 ` Pat LaVarre
2003-10-14 0:38 ` Pat LaVarre
2003-10-14 1:48 ` Pat LaVarre
2003-10-20 23:20 ` Pat LaVarre
2003-10-21 14:47 ` Pat LaVarre
2003-10-21 16:46 ` Pat LaVarre
2003-10-21 18:44 ` Pat LaVarre
2003-10-23 18:52 ` Pat LaVarre
2003-10-27 21:55 ` Pat LaVarre
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