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kernelOfTruth
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Joined: 20 Dec 2005
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PostPosted: Mon Mar 25, 2013 9:54 pm    Post subject: getting ZFSonLinux to work with rt-kernel Reply with quote

Hi,


let's continue the discussion here on how to get ZFSonLinux to work on rt-kernels

from the "AMD64 system slow/unresponsive during disk access (Part 2)" thread


will post a working kernel config (compiled fine) shortly

still have to boot-test it though ...


edit:


seems like the intel-driver is broken & currently not compatible with realtime kernels:

Quote:
CC [M] drivers/gpu/drm/ttm/ttm_page_alloc.o
drivers/gpu/drm/i915/i915_gem.c: In function ‘i915_gem_wait_for_error’:
drivers/gpu/drm/i915/i915_gem.c:119:3: warning: passing argument 1 of ‘rt_spin_lock’ from incompatible pointer type [enabled by default]
spin_lock_irqsave(&x->wait.lock, flags);
^
In file included from include/linux/spinlock.h:273:0,
from include/linux/wait.h:7,
from include/linux/fs.h:6,
from include/drm/drmP.h:47,
from drivers/gpu/drm/i915/i915_gem.c:28:
include/linux/spinlock_rt.h:21:24: note: expected ‘struct spinlock_t *’ but argument is of type ‘struct raw_spinlock_t *’
extern void __lockfunc rt_spin_lock(spinlock_t *lock);
^
drivers/gpu/drm/i915/i915_gem.c:121:3: warning: passing argument 1 of ‘rt_spin_unlock’ from incompatible pointer type [enabled by default]
spin_unlock_irqrestore(&x->wait.lock, flags);
^
In file included from include/linux/spinlock.h:273:0,
from include/linux/wait.h:7,
from include/linux/fs.h:6,
from include/drm/drmP.h:47,
from drivers/gpu/drm/i915/i915_gem.c:28:
include/linux/spinlock_rt.h:24:24: note: expected ‘struct spinlock_t *’ but argument is of type ‘struct raw_spinlock_t *’
extern void __lockfunc rt_spin_unlock(spinlock_t *lock);
^
drivers/gpu/drm/i915/i915_gem.c: In function ‘i915_gem_check_wedge’:
drivers/gpu/drm/i915/i915_gem.c:952:3: warning: passing argument 1 of ‘rt_spin_lock’ from incompatible pointer type [enabled by default]
spin_lock_irqsave(&x->wait.lock, flags);
^
In file included from include/linux/spinlock.h:273:0,
from include/linux/wait.h:7,
from include/linux/fs.h:6,
from include/drm/drmP.h:47,
from drivers/gpu/drm/i915/i915_gem.c:28:
include/linux/spinlock_rt.h:21:24: note: expected ‘struct spinlock_t *’ but argument is of type ‘struct raw_spinlock_t *’
extern void __lockfunc rt_spin_lock(spinlock_t *lock);
^
drivers/gpu/drm/i915/i915_gem.c:954:3: warning: passing argument 1 of ‘rt_spin_unlock’ from incompatible pointer type [enabled by default]
spin_unlock_irqrestore(&x->wait.lock, flags);
^
In file included from include/linux/spinlock.h:273:0,
from include/linux/wait.h:7,
from include/linux/fs.h:6,
from include/drm/drmP.h:47,
from drivers/gpu/drm/i915/i915_gem.c:28:
include/linux/spinlock_rt.h:24:24: note: expected ‘struct spinlock_t *’ but argument is of type ‘struct raw_spinlock_t *’
extern void __lockfunc rt_spin_unlock(spinlock_t *lock);
^
drivers/gpu/drm/i915/i915_gem.c: In function ‘mutex_is_locked_by’:
drivers/gpu/drm/i915/i915_gem.c:4370:14: error: ‘struct mutex’ has no member named ‘owner’
return mutex->owner == task;
^
drivers/gpu/drm/i915/i915_gem.c:4375:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
make[4]: *** [drivers/gpu/drm/i915/i915_gem.o] Error 1
make[3]: *** [drivers/gpu/drm/i915] Error 2
make[3]: *** Waiting for unfinished jobs....




ok - here's the kernel-config:

http://pastebin.com/rL66Sian


hope you can base a - for you working - configuration on it
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kernelOfTruth
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PostPosted: Tue Mar 26, 2013 3:59 pm    Post subject: Reply with quote

the kernel boots fine & works with that configuration

but it tends to hang with some apps - strange behavior I also saw with rt-kernels in the past

so it's low priority for me atm since I need a fully working setup asap (BFS fulfills that criteria)


a kernel fully tweaked + patched up with BFS / ck-patchset is better in this regard and (still) works with ZFS ...
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ryao
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PostPosted: Tue Apr 02, 2013 5:33 am    Post subject: Reply with quote

I have not forgotten about this, but there are a few other bugs that are ahead of this in my bug queue. I will get to this soon.
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aCOSwt
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PostPosted: Tue Apr 02, 2013 9:07 am    Post subject: Re: getting ZFSonLinux to work with rt-kernel Reply with quote

kernelOfTruth wrote:
seems like the intel-driver is broken & currently not compatible with realtime kernels:
Quote:
...
make[4]: *** [drivers/gpu/drm/i915/i915_gem.o] Error 1
...


I think the following patch is needed in order to build the i915 on the last 3.8.4_rt1
Code:
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index de45b60..817e60b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -116,9 +116,9 @@ i915_gem_wait_for_error(struct drm_device *dev)
        * end up waiting upon a subsequent completion event that
        * will never happen.
        */
-      spin_lock_irqsave(&x->wait.lock, flags);
+      raw_spin_lock_irqsave(&x->wait.lock, flags);
       x->done++;
-      spin_unlock_irqrestore(&x->wait.lock, flags);
+      raw_spin_unlock_irqrestore(&x->wait.lock, flags);
    }
    return 0;
 }
@@ -949,9 +949,9 @@ i915_gem_check_wedge(struct drm_i915_private *dev_priv,
       unsigned long flags;

       /* Give the error handler a chance to run. */
-      spin_lock_irqsave(&x->wait.lock, flags);
+      raw_spin_lock_irqsave(&x->wait.lock, flags);
       recovery_complete = x->done > 0;
-      spin_unlock_irqrestore(&x->wait.lock, flags);
+      raw_spin_unlock_irqrestore(&x->wait.lock, flags);

       /* Non-interruptible callers can't handle -EAGAIN, hence return
        * -EIO unconditionally for these. */

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kernelOfTruth
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PostPosted: Sat Apr 20, 2013 1:42 pm    Post subject: Re: getting ZFSonLinux to work with rt-kernel Reply with quote

aCOSwt wrote:
kernelOfTruth wrote:
seems like the intel-driver is broken & currently not compatible with realtime kernels:
Quote:
...
make[4]: *** [drivers/gpu/drm/i915/i915_gem.o] Error 1
...


I think the following patch is needed in order to build the i915 on the last 3.8.4_rt1
Code:
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index de45b60..817e60b 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -116,9 +116,9 @@ i915_gem_wait_for_error(struct drm_device *dev)
        * end up waiting upon a subsequent completion event that
        * will never happen.
        */
-      spin_lock_irqsave(&x->wait.lock, flags);
+      raw_spin_lock_irqsave(&x->wait.lock, flags);
       x->done++;
-      spin_unlock_irqrestore(&x->wait.lock, flags);
+      raw_spin_unlock_irqrestore(&x->wait.lock, flags);
    }
    return 0;
 }
@@ -949,9 +949,9 @@ i915_gem_check_wedge(struct drm_i915_private *dev_priv,
       unsigned long flags;

       /* Give the error handler a chance to run. */
-      spin_lock_irqsave(&x->wait.lock, flags);
+      raw_spin_lock_irqsave(&x->wait.lock, flags);
       recovery_complete = x->done > 0;
-      spin_unlock_irqrestore(&x->wait.lock, flags);
+      raw_spin_unlock_irqrestore(&x->wait.lock, flags);

       /* Non-interruptible callers can't handle -EAGAIN, hence return
        * -EIO unconditionally for these. */



thanks ! :)
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2.6.37.2_plus_v1: BFS, CFS,THP,compaction, zcache or TOI
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kernelOfTruth
Watchman
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PostPosted: Mon May 13, 2013 6:21 pm    Post subject: Reply with quote

ryao wrote:
I have not forgotten about this, but there are a few other bugs that are ahead of this in my bug queue. I will get to this soon.


ok, thanks !

waiting patiently :)
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