- 19 Feb, 2008 40 commits
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Nick Piggin authored
Remove redundant vma range checks. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Airlie <airlied@linux.ie>
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Zhenyu Wang authored
Also applys to recent added new chipset. Signed-off-by: Zhenyu Wang <zhenyu.z.wang@intel.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
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Maciej Cencora authored
This adds support for configuring the RS690 GART. Signed-off-by: Dave Airlie <airlied@redhat.com>
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Linus Torvalds authored
This reverts commit 1f84260c, which is suspected to be the reason for some very occasional and hard-to-trigger crashes that usually look related to memory allocation (mostly reported in networking, but since that's generally the most common source of shortlived allocations - and allocations in interrupt contexts - that in itself is not a big clue). See for example http://bugzilla.kernel.org/show_bug.cgi?id=9973 http://lkml.org/lkml/2008/2/19/278 etc. One promising suspicion for what the root cause of bug is (which also explains why it's so hard to trigger in practice) came from Eric Dumazet: "I wonder how SLUB_FASTPATH is supposed to work, since it is affected by a classical ABA problem of lockless algo. cmpxchg_local(&c->freelist, object, object[c->offset]) can succeed, while an interrupt came (on this cpu), and several allocations were done, and one free was performed at the end of this interruption, so 'object' was recycled. c->freelist can then contain the previous value (object), but object[c->offset] was changed by IRQ. We then put back in freelist an already allocated object." but another reason for the revert is simply that everybody agrees that this code was the main suspect just by virtue of the pattern of oopses. Cc: Torsten Kaiser <just.for.lkml@googlemail.com> Cc: Christoph Lameter <clameter@sgi.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Ingo Molnar <mingo@elte.hu> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds authored
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: [S390] qdio: FCP/SCSI write I/O stagnates on LPAR [S390] Fix futex_atomic_cmpxchg_std inline assembly. [S390] dcss: Fix Unlikely(x) != y [S390] sclp: clean up send/receive naming scheme [S390] etr: fix compile error on !SMP [S390] qdio: fix qdio_activate timeout handling. [S390] Initialize per cpu lowcores on cpu hotplug. [S390] find bit corner case. [S390] dasd: fix locking in __dasd_device_process_final_queue [S390] Make sure enabled wait psw is loaded in default_idle. [S390] Let NR_CPUS default to 32/64 on s390/s390x. [S390] cio: Do timed recovery on workqueue. [S390] cio: Remember to initialize recovery_lock.
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git://git.kernel.dk/linux-2.6-blockLinus Torvalds authored
* 'for-linus' of git://git.kernel.dk/linux-2.6-block: libata: implement drain buffers libata: eliminate the home grown dma padding in favour of block: clear drain buffer if draining for write command block: implement request_queue->dma_drain_needed block: add request->raw_data_len block: update bio according to DMA alignment padding libata: update ATAPI overflow draining elevator: make elevator_get() attempt to load the appropriate module cfq-iosched: add hlist for browsing parallel to the radix tree block: make blk_rq_map_user() clear ->bio if it unmaps it fs/block_dev.c: remove #if 0'ed code make struct def_blk_aops static make blk_settings_init() static make blk_ioc_init() static make blk-core.c:request_cachep static again
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git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdogLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog: [WATCHDOG] HP ProLiant WatchDog driver [WATCHDOG] blackfin Watchdog driver: relocate all strings used in __init functions to __initdata [WATCHDOG] Convert mtx1 wdt to be a platform device and use generic GPIO API [WATCHDOG] Add support for SB1 hardware watchdog
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git://git.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-genirqLinus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/tglx/linux-2.6-genirq: genirq: do not leave interupts enabled on free_irq genirq: spurious.c: use time_* macros
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Add regs_return_value(). [SPARC64]: Kill pcic_present(). [SPARC]: Kill 'prom_palette'. [ATYFB]: Kill 'prom_palette' sparc code. [SPARC64]: Kill 'prom_keyboard'. [SPARC]: Kill extern decl of 'panic_setup'. [SPARC64]: Delete 'boot_flags'. [SPARC64]: Kill unused function 'kernel_enter_debugger'. [SPARC64] arch/sparc64/kernel/unaligned.c: Use time_* macros [SPARC64]: Always register a PROM based early console. [SPARC64]: Update defconfig. [SPARC64]: Add -mtune=ultrasparc3 if possible. [SPARC64]: Remove Makefile code for ancient gcc and binutils. [SPARC64]: Remove DEBUG_BOOTMEM. [SPARC64]: Use shorter "get_zeroed_page" call. [SPARC]: Use shorter form of "get_zeroed_page". [SPARC]: video/cg14.c and video/sbuslib.c build fixes
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (60 commits) [NIU]: Bump driver version and release date. [NIU]: Fix BMAC alternate MAC address indexing. net: fix kernel-doc warnings in header files [IPV6]: Use BUG_ON instead of if + BUG in fib6_del_route. [IPV6]: dst_entry leak in ip4ip6_err. (resend) bluetooth: do not move child device other than rfcomm bluetooth: put hci dev after del conn [NET]: Elminate spurious print_mac() calls. [BLUETOOTH] hci_sysfs.c: Kill build warning. [NET]: Remove MAC_FMT net/8021q/vlan_dev.c: Use print_mac. [XFRM]: Fix ordering issue in xfrm_dst_hash_transfer(). [BLUETOOTH] net/bluetooth/hci_core.c: Use time_* macros [IPV6]: Fix hardcoded removing of old module code [NETLABEL]: Move some initialization code into __init section. [NETLABEL]: Shrink the genl-ops registration code. [AX25] ax25_out: check skb for NULL in ax25_kick() [TCP]: Fix tcp_v4_send_synack() comment [IPV4]: fix alignment of IP-Config output Documentation: fix tcp.txt ...
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Casey Schaufler authored
Smack uses CIPSO labeling, but allows for unlabeled packets by specifying an "ambient" label that is applied to incoming unlabeled packets. Because the other end of the connection may dislike IP options, and ssh is one know application that behaves thus, it is prudent to respond in kind. This patch changes the network labeling behavior such that an outgoing packet that would be given a CIPSO label that matches the ambient label is left unlabeled. An "unlbl" domain is added and the netlabel defaulting mechanism invoked rather than assuming that everything is CIPSO. Locking has been added around changes to the ambient label as the mechanisms used to do so are more involved. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com> Acked-by: Paul Moore <paul.moore@hp.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Ursula Braun authored
If running on LPAR, qdio might overlook an incoming buffer in certain scenarios. The patch makes sure that incoming buffers are detected immediately in all situations. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Add missing exception table entry so that the kernel can handle proctection exceptions as well on the cs instruction. Currently only specification exceptions are handled correctly. The missing entry allows user space to crash the kernel. Cc: stable <stable@kernel.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Roel Kluin authored
Fix Unlikely(x) != y Cc: Gerald Schaefer <geraldsc@de.ibm.com> Cc: Stefan Weinhuber <wein@de.ibm.com> Cc: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Roel Kluin <12o3l@tiscali.nl> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Peter Oberparleiter authored
Make state change events adjust the correct mask by cleaning up naming inconsistencies. Also remove chance for lockup by removing unnecessary mask related check before reading events. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Since a5fbb6d1 "KVM: fix !SMP build error" smp_call_function isn't a define anymore that folds into nothing but a define that calls up_smp_call_function with all parameters. Hence we cannot #ifdef out the unused code anymore... This seems to be the preferred method, so do this for s390 as well. arch/s390/kernel/time.c: In function 'etr_sync_clock': arch/s390/kernel/time.c:825: error: 'clock_sync_cpu_start' undeclared arch/s390/kernel/time.c:862: error: 'clock_sync_cpu_end' undeclared Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Current code in qdio_activate waits for at least 5 seconds until it returns. It may return earlier if an error occurs, but not if everything is ok. This large timeout value became visible with commit dfa77f61 "qdio: set QDIO_ACTIVATE_TIMEOUT to 5s", which intended to fix the timeout value which was zero. In turn setting an FCP adapter online took 5 seconds. In practice waiting for 5ms before continuing is sufficient as pointed out by Utz Bacher and Cornelia Huck. Cc: Utz Bacher <utz.bacher@de.ibm.com> Cc: Jan Glauber <jan.glauber@de.ibm.com> Cc: Ursula Braun <braunu@de.ibm.com> Cc: Martin Peschke <mp3@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Just copy the first 512 read-only bytes of the current cpu lowcore if a new cpu gets onlined. The rest is zeroed out and must be explicitly initialized. Current code just copies the entire lowcore and initializes the needed fields. This should reveal bugs in future enhancements quite early. Also when the lowcore of the first cpu is replaced this is now done atomically (no interrupts, no machine checks). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Martin Schwidefsky authored
Fix [ext2_]find_first_[zero_]bit for the corner case of an all clear or all set bit field by always handling that last word of the bit field with __ffz_word/__ffs_word. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Stefan Weinhuber authored
After setting the status of the cqr and releasing the lock for the block cqr queue, we call the cqr callback function, which will usually just trigger the dasd_block_tasklet. But when the tasklet is already running the cqr might be processed before we invoke the callback function. In rare cases the callback pointer may already be invalid by the time we want to call it, which will result in a panic. Solution: Call the callback function first and then release the lock. Signed-off-by: Stefan Weinhuber <wein@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
If both NO_IDLE_HZ and VIRT_TIMER are disabled default_idle won't load an enabled wait psw and busy loop instead. This is because the idle_chain is empty and the return value of atomic_notifier_call_chain will be NOTIFY_DONE, which causes default_idle to return instead of loading an enabled wait psw. Fix this by calling __atomic_notifier_call_chain instead and add proper return value handling. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Cornelia Huck authored
We can't do our recovery in softirq context, so we schedule it from our timer function. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Cornelia Huck authored
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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James Bottomley authored
This just updates the libata slave configure routine to take advantage of the block layer drain buffers. It also adjusts the size lengths in the atapi code to add the drain buffer to the DMA length so the driver knows it can rely on it. I suspect I should also be checking for AHCI as well as ATA_DEV_ATAPI, but I couldn't see how to do that easily. tj: * atapi_drain_needed() added such that draining is applied to only misc ATAPI commands. * q->bounce_gfp used when allocating drain buffer. * Now duplicate ATAPI PIO drain logic dropped. * ata_dev_printk() used instead of sdev_printk(). Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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James Bottomley authored
that provided by the block layer ATA requires that all DMA transfers begin and end on word boundaries. Because of this, a large amount of machinery grew up in ide to adjust scatterlists on this basis. However, as of 2.5, the block layer has a dma_alignment variable which ensures both the beginning and length of a DMA transfer are aligned on the dma_alignment boundary. Although the block layer does adjust the beginning of the transfer to ensure this happens, it doesn't actually adjust the length, it merely makes sure that space is allocated for transfers beyond the declared length. The upshot of this is that scatterlists may be padded to any size between the actual length and the length adjusted to the dma_alignment safely knowing that memory is allocated in this region. Right at the moment, SCSI takes the default dma_aligment which is on a 512 byte boundary. Note that this aligment only applies to transfers coming in from user space. However, since all kernel allocations are automatically aligned on a minimum of 32 byte boundaries, it is safe to adjust them in this manner as well. tj: * Adjusting sg after padding is done in block layer. Make libata set queue alignment correctly for ATAPI devices and drop broken sg mangling from ata_sg_setup(). * Use request->raw_data_len for ATAPI transfer chunk size. * Killed qc->raw_nbytes. * Separated out killing qc->n_iter. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Tejun Heo authored
Clear drain buffer before chaining if the command in question is a write. Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Tejun Heo authored
Draining shouldn't be done for commands where overflow may indicate data integrity issues. Add dma_drain_needed callback to request_queue. Drain buffer is appened iff this function returns non-zero. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Tejun Heo authored
With padding and draining moved into it, block layer now may extend requests as directed by queue parameters, so now a request has two sizes - the original request size and the extended size which matches the size of area pointed to by bios and later by sgs. The latter size is what lower layers are primarily interested in when allocating, filling up DMA tables and setting up the controller. Both padding and draining extend the data area to accomodate controller characteristics. As any controller which speaks SCSI can handle underflows, feeding larger data area is safe. So, this patch makes the primary data length field, request->data_len, indicate the size of full data area and add a separate length field, request->raw_data_len, for the unmodified request size. The latter is used to report to higher layer (userland) and where the original request size should be fed to the controller or device. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Tejun Heo authored
DMA start address and transfer size alignment for PC requests are achieved using bio_copy_user() instead of bio_map_user(). This works because bio_copy_user() always uses full pages and block DMA alignment isn't allowed to go over PAGE_SIZE. However, the implementation didn't update the last bio of the request to make this padding visible to lower layers. This patch makes blk_rq_map_user() extend the last bio such that it includes the padding area and the size of area pointed to by the request is properly aligned. Signed-off-by: Tejun Heo <htejun@gmail.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Tejun Heo authored
For misc ATAPI commands which transfer variable length data to the host, overflow can occur due to application or hardware bug. Such overflows can be ignored safely as long as overflow data is properly drained. libata HSM implementation has this implemented in __atapi_pio_bytes() and recently updated for 2.6.24-rc but it requires further improvements. Improve drain logic such that... * Report overflow errors using ehi desc mechanism instead of printing directly. * Properly calculate the number of bytes to be drained considering actual number of consumed bytes for partial draining. Signed-off-by: Tejun Heo <htejun@gmail.com> Acked-by: Albert Lee <albertcc@tw.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Thomas Gleixner authored
The default_disable() function was changed in commit: 76d21601 genirq: do not mask interrupts by default It removed the mask function in favour of the default delayed interrupt disabling. Unfortunately this also broke the shutdown in free_irq() when the last handler is removed from the interrupt for those architectures which rely on the default implementations. Now we can end up with a enabled interrupt line after the last handler was removed, which can result in spurious interrupts. Fix this by adding a default_shutdown function, which is only installed, when the irqchip implementation does provide neither a shutdown nor a disable function. [@stable: affected versions: .21 - .24 ] Pointed-out-by: Michael Hennerich <Michael.Hennerich@analog.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: stable@kernel.org Tested-by: Michael Hennerich <Michael.Hennerich@analog.com>
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S.Caglar Onur authored
The functions time_before, time_before_eq, time_after, and time_after_eq are more robust for comparing jiffies against other values. So following patch implements usage of the time_after() macro, defined at linux/jiffies.h, which deals with wrapping correctly Signed-off-by: S.Caglar Onur <caglar@pardus.org.tr> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Jens Axboe authored
Currently we fail if someone requests a valid io scheduler, but it's modular and not currently loaded. That can happen from a driver init asking for a different scheduler, or online switching through sysfs as requested by a user. This patch makes elevator_get() request_module() to attempt to load the appropriate module, instead of requiring that done manually. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Jens Axboe authored
It's cumbersome to browse a radix tree from start to finish, especially since we modify keys when a process exits. So add a hlist for the single purpose of browsing over all known cfq_io_contexts, used for exit, io prio change, etc. This fixes http://bugzilla.kernel.org/show_bug.cgi?id=9948Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Jens Axboe authored
That way the interface is symmetric, and calling blk_rq_unmap_user() on the request wont oops. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Adrian Bunk authored
Commit b2e895db #if 0'ed this code stating: <-- snip --> [PATCH] revert blockdev direct io back to 2.6.19 version Andrew Vasquez is reporting as-iosched oopses and a 65% throughput slowdown due to the recent special-casing of direct-io against blockdevs. We don't know why either of these things are occurring. The patch minimally reverts us back to the 2.6.19 code for a 2.6.20 release. <-- snip --> It has since been dead code, and unless someone wants to revive it now it's time to remove it. This patch also makes bio_release_pages() static again and removes the ki_bio_count member from struct kiocb, reverting changes that had been done for this dead code. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
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Adrian Bunk authored
This patch makes the needlessly global struct def_blk_aops static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
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Adrian Bunk authored
blk_settings_init() can become static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
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Adrian Bunk authored
blk_ioc_init() can become static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Jens Axboe <axboe@carl.home.kernel.dk>
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