Re: Slow dc3dd in 3.18 on x86

2014-10-25 Thread Michael L. Semon
On 10/24/14 21:51, Martin K. Petersen wrote: "Michael" == Michael L Semon writes: Michael> There was nothing regarding integrity in /sys/block/sda. I was Michael> under the impression that both bio integrity and T10 checksums Michael> require hardware support fro

Re: Slow dc3dd in 3.18 on x86

2014-10-25 Thread Michael L. Semon
On 10/24/14 21:51, Martin K. Petersen wrote: Michael == Michael L Semon mlsemo...@gmail.com writes: Michael There was nothing regarding integrity in /sys/block/sda. I was Michael under the impression that both bio integrity and T10 checksums Michael require hardware support from good hardware

Re: Slow dc3dd in 3.18 on x86

2014-10-24 Thread Michael L. Semon
On 10/24/14 15:54, Martin K. Petersen wrote: "Michael" == Michael L Semon writes: Michael> This week, a simple `dc3dd wipe=/dev/sda5` operation had speeds Michael> cut from 10-15 MB/s down to less than 1.8 MB/s. With this Michael> method, syncs took so long that magic Sys

Slow dc3dd in 3.18 on x86

2014-10-24 Thread Michael L. Semon
Hi! I have an old i686 Pentium 4 that I use for xfstests. To better keep integrity, write cache is disabled on an old 60-"megabyte" IDE HDD. The PC runs slackware-current, doing a `git pull` of the kernel and xfs-oss/for-next once or twice a week. This week, a simple `dc3dd wipe=/dev/sda5`

Slow dc3dd in 3.18 on x86

2014-10-24 Thread Michael L. Semon
Hi! I have an old i686 Pentium 4 that I use for xfstests. To better keep integrity, write cache is disabled on an old 60-megabyte IDE HDD. The PC runs slackware-current, doing a `git pull` of the kernel and xfs-oss/for-next once or twice a week. This week, a simple `dc3dd wipe=/dev/sda5`

Re: Slow dc3dd in 3.18 on x86

2014-10-24 Thread Michael L. Semon
On 10/24/14 15:54, Martin K. Petersen wrote: Michael == Michael L Semon mlsemo...@gmail.com writes: Michael This week, a simple `dc3dd wipe=/dev/sda5` operation had speeds Michael cut from 10-15 MB/s down to less than 1.8 MB/s. With this Michael method, syncs took so long that magic SysRq

Re: 3.14.0+/x86: lockdep and mutexes not getting along

2014-04-11 Thread Michael L. Semon
On Wed, 9 Apr 2014, Jason Low wrote: > On Wed, 2014-04-09 at 15:19 +0300, Kirill A. Shutemov wrote: > > On Sun, Apr 06, 2014 at 01:12:14AM -0400, Michael L. Semon wrote: > > > Hi! Starting early in this merge window for 3.15, lockdep has been > > > giving me

Re: 3.14.0+/x86: lockdep and mutexes not getting along

2014-04-11 Thread Michael L. Semon
On Wed, 9 Apr 2014, Jason Low wrote: On Wed, 2014-04-09 at 15:19 +0300, Kirill A. Shutemov wrote: On Sun, Apr 06, 2014 at 01:12:14AM -0400, Michael L. Semon wrote: Hi! Starting early in this merge window for 3.15, lockdep has been giving me trouble. Normally, a splat will happen

3.14.0+/x86: lockdep and mutexes not getting along

2014-04-05 Thread Michael L. Semon
Hi! Starting early in this merge window for 3.15, lockdep has been giving me trouble. Normally, a splat will happen, lockdep will shut itself off, and my i686 Pentium 4 PC will continue. Now, after the splat, it will allow one key of input at either a VGA console or over serial. After that,

3.14.0+/x86: lockdep and mutexes not getting along

2014-04-05 Thread Michael L. Semon
Hi! Starting early in this merge window for 3.15, lockdep has been giving me trouble. Normally, a splat will happen, lockdep will shut itself off, and my i686 Pentium 4 PC will continue. Now, after the splat, it will allow one key of input at either a VGA console or over serial. After that,

Re: [PATCH] jfs: fix generic posix ACL regression

2014-02-07 Thread Michael L. Semon
ple errors in reviewing the patches converting jfs to use the generic posix ACL function. Setting ACL's currently fails with -EOPNOTSUPP. Signed-off-by: Dave Kleikamp Reported-by: Michael L. Semon Cc: Christoph Hellwig --- fs/jfs/xattr.c | 14 +++--- 1 file changed, 7 insertions(+), 7 deletion

Re: [PATCH] jfs: fix generic posix ACL regression

2014-02-07 Thread Michael L. Semon
in reviewing the patches converting jfs to use the generic posix ACL function. Setting ACL's currently fails with -EOPNOTSUPP. Signed-off-by: Dave Kleikamp dave.kleik...@oracle.com Reported-by: Michael L. Semon mlsemo...@gmail.com Cc: Christoph Hellwig h...@lst.de --- fs/jfs/xattr.c | 14 +++--- 1

code is fine but needs lockdep annotation (xfstests, x86, 3.13.0-rc3)

2013-12-12 Thread Michael L. Semon
Hi! Since a particular aio-next merge during the kernel 3.12 development cycle, I've had issues with AIO and xfstests. The typical stalled test would end up stalled, and a SysRq-g would help me get to this stack trace (just for context, the lockdep I'm reporting is one page down): kdb> btp

code is fine but needs lockdep annotation (xfstests, x86, 3.13.0-rc3)

2013-12-12 Thread Michael L. Semon
Hi! Since a particular aio-next merge during the kernel 3.12 development cycle, I've had issues with AIO and xfstests. The typical stalled test would end up stalled, and a SysRq-g would help me get to this stack trace (just for context, the lockdep I'm reporting is one page down): kdb btp

Re: [REGRESSION] x86 vmalloc issue from recent 3.10.0+ commit

2013-07-10 Thread Michael L. Semon
, though, in case it's still needed. Michael On Tue, Jul 9, 2013 at 9:59 PM, Dave Jones wrote: > On Tue, Jul 09, 2013 at 09:51:32PM -0400, Michael L. Semon wrote: > > > kernel: [ 2580.395592] vmap allocation for size 20480 failed: use > vmalloc= to increase size. > > kernel: [

Re: [REGRESSION] x86 vmalloc issue from recent 3.10.0+ commit

2013-07-10 Thread Michael L. Semon
, though, in case it's still needed. Michael On Tue, Jul 9, 2013 at 9:59 PM, Dave Jones da...@redhat.com wrote: On Tue, Jul 09, 2013 at 09:51:32PM -0400, Michael L. Semon wrote: kernel: [ 2580.395592] vmap allocation for size 20480 failed: use vmalloc=size to increase size. kernel

[REGRESSION] x86 vmalloc issue from recent 3.10.0+ commit

2013-07-09 Thread Michael L. Semon
Hi! I'm doing volunteer testing of xfstests and was sent here to ask about this issue. I apologize in advance if the problem has already been solved... I've been testing XFS from various git kernels on 32-bit Pentium 4 and Pentium III PCs. There was an issue with xfstests test xfs/167,

[REGRESSION] x86 vmalloc issue from recent 3.10.0+ commit

2013-07-09 Thread Michael L. Semon
Hi! I'm doing volunteer testing of xfstests and was sent here to ask about this issue. I apologize in advance if the problem has already been solved... I've been testing XFS from various git kernels on 32-bit Pentium 4 and Pentium III PCs. There was an issue with xfstests test xfs/167,