Am Freitag, 20. Juli 2012 schrieb Shavi N:
On Fri, Jul 20, 2012 at 12:19 AM, Martin Steigerwald
mar...@lichtvoll.de wrote:
Am Donnerstag, 19. Juli 2012 schrieb Shavi N:
Hi,
Hi Shavi,
Thanks.
This is the output:
btrfs:
$ dd if=/dev/zero of=/mnt/shared/misc/temp_file
Martin,
I agree with you 100% that dd does not measure proper performance (and
that /dev/zero is not a very good test).
Hence I'm asking.. I know that I get fast copy/write speeds on the
btrfs volume from real life situations, but NOT with samba.
So, is there something I can do to test why samba
On Wed, Jul 18, 2012 at 08:31:05PM -0600, Liu Bo wrote:
On 07/19/2012 10:05 AM, David Sterba wrote:
[ pagevec vs array ]
Sorry, I see no difference between 16 pages array and pagevec(14 pages), and
I have no idea why ext4 use 16 pages array(maybe historical reasons), but IMO
it is proper and
Am Freitag, 20. Juli 2012 schrieb Remco Hosman:
11 really fast 15000rpm FC / SAS disks could possibly do 936 MB/s.
But regular 7200rpm SATA disks depending to the on disk location
might be as slow as 40-50 MB/s – just try fio disk-zone-profile on
one if you do not believe this – and then
SSD's do not gain anything by having metadata DUP turned on. The underlying
file system that is a part of all SSD's could easily map duplicate metadat
blocks into the same erase block which effectively eliminates the benefit of
duplicating the metadata on disk. So detect if we are formatting a
The following patches are against Josef's btrfs-next repository,
and depend on Arnd Hannemann's Btrfs: allow mount -o remount,compress=no
patch.
The method was based on a previous example of checking for
lzo INCOMPAT used by Li Zefan when defragmenting with explicit
compression (btrfs: Allow to
In support of the recently added capability to remount with lzo
compression, check the compression INCOMPAT flags when remounting
with lzo compression, and set the flags if necessary.
Signed-off-by: Mitch Harder mitch.har...@sabayonlinux.org
---
fs/btrfs/ctree.h |1 +
fs/btrfs/super.c | 21
When defragmenting with explicit lzo compression, simplify
the check for lzo INCOMPAT by using the new common function
introduced to support remounting with lzo compression.
Signed-off-by: Mitch Harder mitch.har...@sabayonlinux.org
---
fs/btrfs/ioctl.c |7 +--
1 files changed, 1
On Fri, Jul 20, 2012 at 11:36:20AM -0600, Mitch Harder wrote:
In support of the recently added capability to remount with lzo
compression, check the compression INCOMPAT flags when remounting
with lzo compression, and set the flags if necessary.
Signed-off-by: Mitch Harder
+static int is_ssd(const char *file)
+{
+ char *dev = strrchr(file, '/');
[ ... ]
+ snprintf(path, PATH_MAX, /sys/block/%s/queue/rotational, dev);
+ fd = open(path, O_RDONLY);
Hmm, this doesn't seem right. The last path component can have nothing
to do with the underlying
On Fri, Jul 20, 2012 at 12:18:59PM -0600, Zach Brown wrote:
+static int is_ssd(const char *file)
+{
+ char *dev = strrchr(file, '/');
[ ... ]
+ snprintf(path, PATH_MAX, /sys/block/%s/queue/rotational, dev);
+ fd = open(path, O_RDONLY);
Hmm, this doesn't seem right. The
On Fri, Jul 20, 2012 at 02:20:56PM -0400, Josef Bacik wrote:
Partitions are for losers.
*fist bump*
- z
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On Fri, Jul 20, 2012 at 12:20:56PM -0600, Josef Bacik wrote:
On Fri, Jul 20, 2012 at 12:18:59PM -0600, Zach Brown wrote:
+static int is_ssd(const char *file)
+{
+ char *dev = strrchr(file, '/');
[ ... ]
+ snprintf(path, PATH_MAX, /sys/block/%s/queue/rotational, dev);
+ fd
+ struct page *page;
+ int i = 0;
+ int nr = 0;
i doesn't need to be initialized.
for (page_idx = 0; page_idx nr_pages; page_idx++) {
- struct page *page = list_entry(pages-prev, struct page, lru);
+ page = list_entry(pages-prev, struct page,
SSD's do not gain anything by having metadata DUP turned on. The underlying
file system that is a part of all SSD's could easily map duplicate metadat
blocks into the same erase block which effectively eliminates the benefit of
duplicating the metadata on disk. So detect if we are formatting a
In support of the recently added capability to remount with lzo
compression, check the compression INCOMPAT flags when remounting
with lzo compression, and set the flags if necessary.
Signed-off-by: Mitch Harder mitch.har...@sabayonlinux.org
---
v1-v2:
- Remove extraneous formatting change.
When defragmenting with explicit lzo compression, simplify
the check for lzo INCOMPAT by using the new common function
introduced to support remounting with lzo compression.
Signed-off-by: Mitch Harder mitch.har...@sabayonlinux.org
---
fs/btrfs/ioctl.c |7 +--
1 files changed, 1
There is a small window where an eb can have no IO bits set on it, which
could potentially result in extent_buffer_under_io() returning false when we
want it to return true, which could result in not fun things happening. So
in order to protect this case we need to hold the refs_lock when we make
The following patch is against Josef's btrfs-next repository,
and depends on Arnd Hannemann's patch:
Btrfs: allow mount -o remount,compress=no
The method was based on a previous example of checking for
lzo INCOMPAT used by Li Zefan when defragmenting with explicit
compression (btrfs: Allow to
In support of the recently added capability to remount with lzo
compression, provide a helper function to check the compression
INCOMPAT flags when remounting with lzo compression, and set
the flags if necessary.
Also, implement the new helper function when defragmenting with
explicit lzo
On 07/21/2012 02:42 AM, Zach Brown wrote:
+struct page *page;
+int i = 0;
+int nr = 0;
i doesn't need to be initialized.
for (page_idx = 0; page_idx nr_pages; page_idx++) {
-struct page *page = list_entry(pages-prev, struct page, lru);
+page =
While testing with my buffer read fio jobs[1], I find that btrfs does not
perform well enough.
Here is a scenario in fio jobs:
We have 4 threads, t1 t2 t3 t4, starting to buffer read a same file,
and all of them will race on add_to_page_cache_lru(), and if one thread
successfully puts its page
From: Zhou Bo zhoub-f...@cn.fujitsu.com
This patch adds btrfs snapshot function test to xfstests.
Signed-off-by: Zhou Bo zhoub-f...@cn.fujitsu.com
---
285 | 365 +++
285.out |2 +
group |1 +
3 files changed, 368
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