- 20 May, 2005 21 commits
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Paul Jackson authored
This patch removes the entwining of cpusets and hotplug code in the "No more Mr. Nice Guy" case of sched.c move_task_off_dead_cpu(). Since the hotplug code is holding a spinlock at this point, we cannot take the cpuset semaphore, cpuset_sem, as would seem to be required either to update the tasks cpuset, or to scan up the nested cpuset chain, looking for the nearest cpuset ancestor that still has some CPUs that are online. So we just punt and blast the tasks cpus_allowed with all bits allowed. This reverts these lines of code to what they were before the cpuset patch. And it updates the cpuset Doc file, to match. The one known alternative to this that seems to work came from Dinakar Guniguntala, and required the hotplug code to take the cpuset_sem semaphore much earlier in its processing. So far as we know, the increased locking entanglement between cpusets and hot plug of this alternative approach is not worth doing in this case. Signed-off-by:
Paul Jackson <pj@sgi.com> Acked-by:
Nathan Lynch <ntl@pobox.com> Acked-by:
Dinakar Guniguntala <dino@in.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Matt Porter authored
This patch fixed CONFIG_TASK_SIZE handling on 44x. Currently head_44x.S hardcodes 0x80000000, which breaks if user chooses to change TASK_SIZE (e.g. for 3G user-space). Tested on Ocotea in 3G/1G configuration. Signed-off-by:
Eugene Surovegin <ebs@ebshome.net> Signed-off-by:
Matt Porter <mporter@kernel.crashing.org> Signed-off-by:
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Kumar Gala authored
Initialization of 8250 serial ports that are platform devices require that at empty entry exists in the array of plat_serial8250_port. With out an empty entry we can get some pretty random behavior. Signed-off-by:
Kumar Gala <kumar.gala@freescale.com> Signed-off-by:
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Jeff Dike authored
From: Al Viro - we have error messages with KERN_ERR in them, so they should be printk-ed rather than printf-ed. Signed-off-by:
Jeff Dike <jdike@addtoit.com> Cc: <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by:
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Jeff Dike authored
From: Al Viro - add three-level page table support to fixrange_init. Signed-off-by:
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Jeff Dike authored
Finally rip out the ubd-mmap code, which turned out to be broken by design. Signed-off-by:
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Jeff Dike authored
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all systemcalls from initrd_user.c file under os-Linux dir and join initrd_user.c and initrd_kern.c files in new file initrd.c Signed-off-by:
Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by:
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Jeff Dike authored
From: Oleg Drokin: This patch is needed to support kernel modules that want to use clear_user() (that is exported symbol on all other architectures). Signed-off-by:
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Jeff Dike authored
Byte-swapping of the port and IP address passed in to the multicast driver by the user used to happen in different places, which was a bug in itself. The port also was swapped before being printk-ed, which led to a misleading message. This patch moves the port swapping to the same place as the IP address swapping. It also cleans up the error paths of mcast_open. Signed-off-by:
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Jeff Dike authored
This patch cleans up the delay implementations a bit, makes the loops unoptimizable, and exports __udelay and __const_udelay. Signed-off-by:
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Jeff Dike authored
Any access to a PROT_NONE page should segfault the process. A JVM seems to do this on purpose. Also, Al noticed some bogus code, which is now deleted. Signed-off-by:
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Jeff Dike authored
Some changes that I sent in didn't make 2.6.12-rc4 for some reason. This adds them back. We have an x86_64 definition of TOP_ADDR a reimplementation of the x86_64 csum_partial_copy_from_user some syntax fixes in arch/um/kernel/ptrace.c removal of a CFLAGS definition in the x86_64 Makefile some include changes in the x86_64 ptrace.c and user-offsets.h a syntax fix in elf-x86_64.h Also moved an include in the i386 and x86_64 Makefiles to make the symlinks work, and some small fixes from Al Viro. Signed-off-by:
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Peter Osterlund authored
If you tried to open a packet device first in read-only mode and then a second time in read-write mode, the second open succeeded even though the device was not correctly set up for writing. If you then tried to write data to the device, the writes would fail with I/O errors. This patch prevents that problem by making the second open fail with -EBUSY. Signed-off-by:
Peter Osterlund <petero2@telia.com> Cc: Al Viro <viro@parcelfarce.linux.theplanet.co.uk> Signed-off-by:
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Linus Torvalds authored
Hopefully the addition of -E to my applypatch script will mean that I won't have these kinds of leftovers in the future.
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David S. Miller authored
The recent change to add a timeout to strbuf flushing had a negative performance impact. The udelay()'s are too long, and they were done in the wrong order wrt. the register read checks. Fix both, and things are happy again. There are more possible improvements in this area. In fact, PCI streaming buffer flushing seems to be part of the bottleneck in network receive performance on my SunBlade1000 box. Signed-off-by:David S. Miller <davem@davemloft.net>
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Corey Minyard authored
Add support for sysfs to the IPMI device interface. Clean-ups based on Dimitry Torokovs comment by Philipp Hahn. Signed-off-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
Philipp Hahn <pmhahn@titan.lahn.de> Signed-off-by:
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Paul Mackerras authored
This fixes an uninitialized variable warning in arch/ppc/kernel/setup.c, and this time gcc is actually right, there is a path that could result in offset being uninitialized. Zero is a sane default in this instance. Signed-off-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
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Paul Mackerras authored
Recently the __copy_tofrom_user routine was modified to avoid doing prefetches past the end of the source array. However, in doing so we introduced a bug in that it now returns the wrong value for the number of bytes not copied when a fault is encountered. This fixes it to return the correct number. Signed-off-by:
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Paul Mackerras authored
We are computing phys in the code below and never using. This patch takes out the redundant computation. Signed-off-by:
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Paul Mackerras authored
On ppc32, the platform code can supply a "progress" function that is used to show progress through the boot. These functions are usually in an init section and so can't be called after the init pages are freed. Now that the cpu bringup code can be called after the system is booted (for hotplug cpu) we can get the situation where the progress function can be called after boot. The simple fix is to set the progress function pointer to NULL when the init pages are freed, and that is what this patch does (note that all callers already check whether the function pointer is NULL before trying to call it). Signed-off-by:
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Linus Torvalds authored
As noted by Chris Wright, we need to do the full range of tests regardless of whether MAP_FIXED is set or not, so re-organize get_unmapped_area() slightly to do the sanity checks unconditionally.
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- 19 May, 2005 18 commits
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Tommy S. Christensen authored
In netlink_broadcast() we're sending shared skb's to netlink listeners when possible (saves some copying). This is OK, since we hold the only other reference to the skb. However, this implies that we must drop our reference on the skb, before allowing a receiving socket to disappear. Otherwise, the socket buffer accounting is disrupted. Signed-off-by:
Tommy S. Christensen <tommy.christensen@tpack.net> Acked-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Tommy S. Christensen authored
Cloned packets don't need the orphan call. Signed-off-by:
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Tommy S. Christensen authored
This bug causes: assertion (!atomic_read(&sk->sk_rmem_alloc)) failed at net/netlink/af_netlink.c (122) What's happening is that: 1) The skb is sent to socket 1. 2) Someone does a recvmsg on socket 1 and drops the ref on the skb. Note that the rmalloc is not returned at this point since the skb is still referenced. 3) The same skb is now sent to socket 2. This version of the fix resurrects the skb_orphan call that was moved out, last time we had 'shared-skb troubles'. It is practically a no-op in the common case, but still prevents the possible race with recvmsg. Signed-off-by:
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Jamal Hadi Salim authored
Make it consistent with other net/sched files Signed-off-by:
Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by:
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Herbert Xu authored
We need to verify that the payload contains enough data so that attach_one_algo can copy alg_key_len bits from the payload. Signed-off-by:
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Herbert Xu authored
The variable alg_key_len is in bits and not bytes. The function attach_one_algo is currently using it as if it were in bytes. This causes it to read memory which may not be there. Signed-off-by:
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David S. Miller authored
Just do an skb_orphan() and be done with it. Based upon discussions with Herbert Xu on netdev. Signed-off-by: -
Julian Anastasov authored
Remove extra __ip_vs_conn_put for incoming ICMP in direct routing mode. Mark de Vries reports that IPVS connections are not leaked anymore. Signed-off-by:
Julian Anastasov <ja@ssi.bg> Signed-off-by:
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Christoph Hellwig authored
currently it opencodes it, but that's in the way of chaning the lookup_hash interface. I'd prefer to disallow modular af_unix over exporting lookup_create, but I'll leave that to you. Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
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Linus Torvalds authored
Prevent the topdown allocator from allocating mmap areas all the way down to address zero. We still allow a MAP_FIXED mapping of page 0 (needed for various things, ranging from Wine and DOSEMU to people who want to allow speculative loads off a NULL pointer). Tested by Chris Wright. Signed-off-by: -
Herbert Xu authored
Having frag_list members which holds wmem of an sk leads to nightmares with partially cloned frag skb's. The reason is that once you unleash a skb with a frag_list that has individual sk ownerships into the stack you can never undo those ownerships safely as they may have been cloned by things like netfilter. Since we have to undo them in order to make skb_linearize happy this approach leads to a dead-end. So let's go the other way and make this an invariant: For any skb on a frag_list, skb->sk must be NULL. That is, the socket ownership always belongs to the head skb. It turns out that the implementation is actually pretty simple. The above invariant is actually violated in the following patch for a short duration inside ip_fragment. This is OK because the offending frag_list member is either destroyed at the end of the slow path without being sent anywhere, or it is detached from the frag_list before being sent. Signed-off-by:
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Evgeniy Polyakov authored
It looks like skb_cow_data() does not set proper owner for newly created skb. If we have several fragments for skb and some of them are shared(?) or cloned (like in async IPsec) there might be a situation when we require recreating skb and thus using skb_copy() for it. Newly created skb has neither a destructor nor a socket assotiated with it, which must be copied from the old skb. As far as I can see, current code sets destructor and socket for the first one skb only and uses truesize of the first skb only to increment sk_wmem_alloc value. If above "analysis" is correct then attached patch fixes that. Signed-off-by:
Evgeniy Polyakov <johnpol@2ka.mipt.ru> Acked-by:
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David S. Miller authored
Signed-off-by: -
David S. Miller authored
Extract DMA boundary bit selection into a seperate function, tg3_calc_dma_bndry(). Call this from tg3_test_dma(). Make DMA test more reliable by using no DMA boundry setting during the test. If the test passes, then use the setting we selected before the test. Signed-off-by:
Michael Chan <mchan@broadcom.com>
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David S. Miller authored
Even though we do software interrupt mitigation via NAPI, it still helps to have some minimal hw assisted mitigation. This helps, particularly, on systems where register I/O overhead is much greater than the CPU horsepower. For example, it helps on NUMA systems. In such cases the PIO overhead to disable interrupts for NAPI accounts for the majority of the packet processing cost. The CPU is fast enough such that only a single packet is processed by each NAPI poll call. Thanks to Michael Chan for reviewing this patch. Signed-off-by: -
David S. Miller authored
When supported, use the TAGGED interrupt processing support the chip provides. In this mode, instead of a "on/off" binary semaphore, an incrementing tag scheme is used to ACK interrupts. All MSI supporting chips support TAGGED mode, so the tg3_msi() interrupt handler uses it unconditionally. This invariant is verified when MSI support is tested. Since we can invoke tg3_poll() multiple times per interrupt under high packet load, we fetch a new copy of the tag value in the status block right before we actually do the work. Also, because the tagged status tells the chip exactly which work we have processed, we can make two optimizations: 1) tg3_restart_ints() need not check tg3_has_work() 2) the tg3_timer() need not poke the chip 10 times per second to keep from losing interrupt events Based upon valuable feedback from Michael Chan <mchan@broadcom.com> Signed-off-by:
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- 18 May, 2005 1 commit
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