On Thu, Oct 18, 2012 at 9:28 PM, Chris Mason chris.ma...@fusionio.com wrote:
If it isn't the free space cache, it'll be a fragmentation problem. The
easiest way to tell the difference is to get a few sysrq-w snapshots
during the boot.
Hi, Chris,
with some help from openSUSE community, I
On Fri, Oct 19, 2012 at 9:28 AM, Marguerite Su i...@marguerite.su wrote:
On Thu, Oct 18, 2012 at 9:28 PM, Chris Mason chris.ma...@fusionio.com wrote:
If it isn't the free space cache, it'll be a fragmentation problem. The
easiest way to tell the difference is to get a few sysrq-w snapshots
On Fri, Oct 19, 2012 at 11:41 PM, cwillu cwi...@cwillu.com wrote:
You need to hit alt-sysrq-w during the slowness you're trying to
instrument; the pastebin is from an hour later.
Also, next time just put the output directly in the email, that way
it's permanently around to look at and search
On Fri, Oct 19, 2012 at 11:41 PM, cwillu cwi...@cwillu.com wrote:
Also, next time just put the output directly in the email, that way
it's permanently around to look at and search for.
Hi,
I did it. here's my dmesg:
[ 25.623660] SysRq : Show Blocked State
[ 25.623667] task
On Fri, Oct 19, 2012 at 10:18 AM, Marguerite Su i...@marguerite.su wrote:
On Fri, Oct 19, 2012 at 11:41 PM, cwillu cwi...@cwillu.com wrote:
Also, next time just put the output directly in the email, that way
it's permanently around to look at and search for.
Hi,
I did it. here's my dmesg:
On Sat, Oct 20, 2012 at 12:55 AM, cwillu cwi...@cwillu.com wrote:
It appears space_cache isn't enabled on your rootfs; can you do a
mount / -o remount,space_cache, sync a couple times, make some
coffee, and then reboot, and see if it's better?
You should see two instances of btrfs: disk space
On Fri, Oct 19, 2012 at 11:02 AM, Marguerite Su i...@marguerite.su wrote:
On Sat, Oct 20, 2012 at 12:55 AM, cwillu cwi...@cwillu.com wrote:
It appears space_cache isn't enabled on your rootfs; can you do a
mount / -o remount,space_cache, sync a couple times, make some
coffee, and then reboot,
On Sat, Oct 20, 2012 at 12:55 AM, cwillu cwi...@cwillu.com wrote:
It appears space_cache isn't enabled on your rootfs; can you do a
mount / -o remount,space_cache, sync a couple times, make some
coffee, and then reboot, and see if it's better?
You should see two instances of btrfs: disk space
On Sat, Oct 20, 2012 at 2:26 AM, cwillu cwi...@cwillu.com wrote:
That would work, but it's only necessary to mount with it once (and
it's probably been done already with /home), hence the -o
remount,space_cache
Now my kernel loads in 10s, another 4s for userspace...then -.mount
and all the
On Fri, Oct 19, 2012 at 12:33 PM, Marguerite Su i...@marguerite.su wrote:
On Sat, Oct 20, 2012 at 2:26 AM, cwillu cwi...@cwillu.com wrote:
That would work, but it's only necessary to mount with it once (and
it's probably been done already with /home), hence the -o
remount,space_cache
Now my
On Sat, Oct 20, 2012 at 2:35 AM, cwillu cwi...@cwillu.com wrote:
Without space_cache (once), btrfs has to repopulate that information
the slow way every mount; with it, it can just load the data from the
last unmount (modulo some consistency checks).
The setting is sticky, so you don't
On Fri, Oct 19, 2012 at 1:02 PM, Marguerite Su i...@marguerite.su wrote:
On Sat, Oct 20, 2012 at 2:35 AM, cwillu cwi...@cwillu.com wrote:
Without space_cache (once), btrfs has to repopulate that information
the slow way every mount; with it, it can just load the data from the
last unmount
Hi, all,
I ran into a situation that no useful information can be found over
the internet...
I'm using 3.6.2 + btrfs git compiled using dkms, and I have a 300GB
btrfs /home and 50GB btrfs /:
Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total
On Thu, Oct 18, 2012 at 05:29:50AM -0600, Marguerite Su wrote:
Hi, all,
I ran into a situation that no useful information can be found over
the internet...
I'm using 3.6.2 + btrfs git compiled using dkms, and I have a 300GB
btrfs /home and 50GB btrfs /:
Usually when btrfs is slow to
On Thu, Oct 18, 2012 at 9:28 PM, Chris Mason chris.ma...@fusionio.com wrote:
Usually when btrfs is slow to mount, or slow right after a mount it is
because we're regenerating the free space cache. This is slow enough
that you should be able to see the free space cache threads active even
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