- 09 Nov, 2005 2 commits
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Christoph Hellwig authored
Signed-off-by:James Bottomley <James.Bottomley@SteelEye.com>
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James Bottomley authored
sd_issue_flush() is called from atomic context so we can't use the semaphore based routines to get a reference to the scsi_disk. Assume something else already got the reference so we can safely use it. Signed-off-by:
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- 08 Nov, 2005 38 commits
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Alan Stern authored
Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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goggin, edward authored
The problem is that scsi_run_queue is called from scsi_next_command() after doing a scsi_put_command. If the command was the only thing holding the reference on the scsi_device then the resulting device put will tear down the block queue. Fix this by taking a reference to the device and holding it around scsi_run_queue() Signed-off-by: -
James Bottomley authored
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Linus Torvalds authored
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Ram Pai authored
Signed-off-by:
Ram Pai <linuxram@us.ibm.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Ram Pai authored
An unbindable mount does not forward or receive propagation. Also unbindable mount disallows bind mounts. The semantics is as follows. Bind semantics: It is invalid to bind mount an unbindable mount. Move semantics: It is invalid to move an unbindable mount under shared mount. Clone-namespace semantics: If a mount is unbindable in the parent namespace, the corresponding cloned mount in the child namespace becomes unbindable too. Note: there is subtle difference, unbindable mounts cannot be bind mounted but can be cloned during clone-namespace. Signed-off-by:
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Ram Pai authored
This makes bind, rbind, move, clone namespace and umount operations aware of the semantics of slave mount (see Documentation/sharedsubtree.txt in the last patch of the series for detailed description). Signed-off-by:
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Ram Pai authored
A slave mount always has a master mount from which it receives mount/umount events. Unlike shared mount the event propagation does not flow from the slave mount to the master. Signed-off-by:
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Ram Pai authored
An unmount of a mount creates a umount event on the parent. If the parent is a shared mount, it gets propagated to all mounts in the peer group. Signed-off-by:
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Ram Pai authored
Implement handling of mount --move in presense of shared mounts (see Documentation/sharedsubtree.txt in the end of patch series for detailed description). Signed-off-by:
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Ram Pai authored
Implement handling of MS_BIND in presense of shared mounts (see Documentation/sharedsubtree.txt in the end of patch series for detailed description). Signed-off-by:
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Ram Pai authored
This creates shared mounts. A shared mount when bind-mounted to some mountpoint, propagates mount/umount events to each other. All the shared mounts that propagate events to each other belong to the same peer-group. Signed-off-by:
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Ram Pai authored
A private mount does not forward or receive propagation. This patch provides user the ability to convert any mount to private. Signed-off-by:
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Ram Pai authored
This removes the per-namespace semaphore in favor of a global semaphore. This can have an effect on namespace scalability. Signed-off-by:
Miklos Szeredi <miklos@szeredi.hu> Signed-off-by:
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Ram Pai authored
- clean up the ugliness in may_umount_tree() - fix a bug in do_loopback(). after cloning a tree, do_loopback() unlinks only the topmost mount of the cloned tree, leaving behind the children mounts on their corresponding expiry list. Signed-off-by:
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Ram Pai authored
umount is done under the protection of the namespace semaphore. This can lead to intresting deadlocks when the last reference to a mount is released, if filesystem code is in sufficiently nasty state. This collects all the to-be-released-mounts and releases them after releasing the namespace semaphore. That both reduces the time we are holding namespace semaphore and gets the things more robust. Idea proposed by Al Viro. Signed-off-by:
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Ram Pai authored
Old semantics: graft_tree() grabs a reference on the vfsmount before returning success. New one: graft_tree() leaves that to caller. All the callers of graft_tree() immediately dropped that reference anyway. Changing the interface takes care of this unnecessary overhead. Idea proposed by Al Viro. Signed-off-by:
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Ram Pai authored
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Al Viro authored
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Al Viro authored
Allow caller of seq_open() to kmalloc() seq_file + whatever else they want and set ->private_data to it. seq_open() will then abstain from doing allocation itself. Signed-off-by:
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Al Viro authored
- check_mnt() on the source of binding should've been unconditional from the very beginning. My fault - as far I could've trace it, that's an old thinko made back in 2001. Kudos to Miklos for spotting it... Fixed. - code cleaned up. Signed-off-by:
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Al Viro authored
The way we currently deal with quota and process accounting that might keep vfsmount busy at umount time is inherently broken; we try to turn them off just in case (not quite correctly, at that) and a) pray umount doesn't fail (otherwise they'll stay turned off) b) pray nobody doesn anything funny just as we turn quota off Moreover, LSM provides hooks for doing the same sort of broken logics. The proper way to deal with that is to introduce the second kind of reference to vfsmount. Semantics: - when the last normal reference is dropped, all special ones are converted to normal ones and if there had been any, cleanup is done. - normal reference can be cloned into a special one - special reference can be converted to normal one; that's a no-op if we'd already passed the point of no return (i.e. mntput() had converted special references to normal and started cleanup). The way it works: e.g. starting process accounting converts the vfsmount reference pinned by the opened file into special one and turns it back to normal when it gets shut down; acct_auto_close() is done when no normal references are left. That way it does *not* obstruct umount(2) and it silently gets turned off when the last normal reference to vfsmount is gone. Which is exactly what we want... The same should be done by LSM module that holds some internal references to vfsmount and wants to shut them down on umount - it should make them special and security_sb_umount_close() will be called exactly when the last normal reference to vfsmount is gone. quota handling is even simpler - we don't use normal file IO anymore, so there's no need to hold vfsmounts at all. DQUOT_OFF() is done from deactivate_super(), where it really belongs. Signed-off-by:
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Benjamin Herrenschmidt authored
For some stupid reason I can't explain (brown paper bag is at hand), I removed the check pfn_valid() in the code that does the icache/dcache coherency on POWER4 and later. That causes us to eventually try to access non existing struct page when hashing in IO pages. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Stephen Rothwell authored
This is very simple with it being almost all ppc32 with just a couple of common defines. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Paul Mackerras authored
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Paul Mackerras authored
This fixes a build error when building the pmac sound driver as a module for 64-bit powermacs. Signed-off-by: -
Paul Mackerras authored
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Mike Kravetz authored
On Tue, Nov 08, 2005 at 08:12:56AM +1100, Benjamin Herrenschmidt wrote: > Yes, the MAX_ORDER should be different indeed. But can Kconfig do that ? > That is have the default value be different based on a Kconfig option ? > I don't see that ... We may have to do things differently here... This seems to be done in other parts of the Kconfig file. Using those as an example, this should keep the MAX_ORDER block size at 16MB. Signed-off-by:
Mike Kravetz <kravetz@us.ibm.com> Signed-off-by:
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Anton Blanchard authored
Even though we can enable and disable xmon at runtime now, there are a few places in the merge tree that call xmon and xmon_printf directly. In the case below we call die() which will call xmon if it is enabled. Also remove an unnecessary include of xmon.h in smp.c. Signed-off-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
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Anton Blanchard authored
Oprofile was hardwiring the MMCRA sample bit to 1 but on newer cpus (eg POWER5) we want to vary it based on the group being sampled. Add a temporary workaround until people update their oprofile userspace. Signed-off-by:
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Anton Blanchard authored
On ppc64 we end up with a negative value for the data size in the memory boot message: Memory: 2035560k/2097152k available (5792k kernel code, 89564k reserved, 18014398509481632k data, 870k bss, 352k init) It turns out the section ordering of the linker script is different on ppc32 and ppc64, so just count data as _edata - _sdata which should work on both. Signed-off-by:
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Benjamin Herrenschmidt authored
The PowerBook HD led code uses obsoletes device-tree accessors which do not work anymore for getting the root of the tree. Signed-off-by:
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Benjamin Herrenschmidt authored
xmon() prototype is inconsistent between ARCH=ppc and ARCH=powerpc, thus causing ARCH=ppc build breakage. Signed-off-by:
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Benjamin Herrenschmidt authored
Building a PowerMac kernel with ARCH=powerpc causes a bunch of warnings, this fixes some of them Signed-off-by:
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Benjamin Herrenschmidt authored
This adds a new thermal control framework for PowerMac, along with the implementation for PowerMac8,1, PowerMac8,2 (iMac G5 rev 1 and 2), and PowerMac9,1 (latest single CPU desktop). In the future, I expect to move the older G5 thermal control to the new framework as well. Signed-off-by:
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Benjamin Herrenschmidt authored
Some more U3 revisions have the missing "interrupts" property in U3, this adds them to the fixup code in prom_init.c Signed-off-by:
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