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The issue is that cv_timedwait() sleeps uninterruptibly to block signals
and avoid waking up early. Under Linux this counts against the load
average keeping it artificially high. This change allows the arc to
sleep interruptibly which mean it may be woken up early due to a signal.
Normally this means some extra care must be taken to handle a potential
signal. But for the arcs usage of cv_timedwait() there is no harm in
waking up before the timeout expires so no extra handling is required.
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This commit fixes a sign extension bug affecting l2arc devices. Extremely
large offsets may be passed down to the low level block device driver on
reads, generating errors similar to
attempt to access beyond end of device
sdbi1: rw=14, want=36028797014862705, limit=125026959
The unwanted sign extension occurrs because the function arc_read_nolock()
stores the offset as a daddr_t, a 32-bit signed int type in the Linux kernel.
This offset is then passed to zio_read_phys() as a uint64_t argument, causing
sign extension for values of 0x80000000 or greater. To avoid this, we store
the offset in a uint64_t.
This change also changes a few daddr_t struct members to uint64_t in the libspl
headers to avoid similar bugs cropping up in the future. We also add an ASSERT
to __vdev_disk_physio() to check for invalid offsets.
Closes #66
Signed-off-by: Brian Behlendorf <[email protected]>
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Setup linux kernel module support, this includes:
- zfs context for kernel/user
- kernel module build system integration
- kernel module macros
- kernel module symbol export
- kernel module options
Signed-off-by: Brian Behlendorf <[email protected]>
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Required kmem/vmem changes
Signed-off-by: Brian Behlendorf <[email protected]>
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Add missing \n's to dprintf()s
Signed-off-by: Brian Behlendorf <[email protected]>
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Remove all instances of list handling where the API is not used
and instead list data members are directly accessed. Doing this
sort of thing is bad for portability.
Additionally, ensure that list_link_init() is called on newly
created list nodes. This ensures the node is properly initialized
and does not rely on the assumption that zero'ing the list_node_t
via kmem_zalloc() is the same as proper initialization.
Signed-off-by: Brian Behlendorf <[email protected]>
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Gcc -Wall warn: 'uninitialized variable'
Signed-off-by: Brian Behlendorf <[email protected]>
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Gcc -Wall warn: 'unused variable'
Signed-off-by: Brian Behlendorf <[email protected]>
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Gcc -Wall warn: 'missing parenthesis'
Signed-off-by: Brian Behlendorf <[email protected]>
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Gcc ASSERT() missing cases are impossible
Signed-off-by: Brian Behlendorf <[email protected]>
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Resolve compiler warnings concerning missing braces.
Signed-off-by: Brian Behlendorf <[email protected]>
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Gcc -Wall warn: 'invalid prototype'
Signed-off-by: Brian Behlendorf <[email protected]>
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Gcc -Wall warn: 'lacks a cast'
Gcc -Wall warn: 'comparison between pointer and integer'
Signed-off-by: Brian Behlendorf <[email protected]>
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Fix non-c90 compliant code, for the most part these changes
simply deal with where a particular variable is declared.
Under c90 it must alway be done at the very start of a block.
Signed-off-by: Brian Behlendorf <[email protected]>
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This is the last official OpenSolaris tag before the public
development tree was closed.
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