- 09 10月, 2008 29 次提交
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由 Tejun Heo 提交于
A klist entry is kept on the list till all its current iterations are finished; however, a new iteration after deletion also iterates over deleted entries as long as their reference count stays above zero. This causes problems for cases where there are users which iterate over the list while synchronized against list manipulations and natuarally expect already deleted entries to not show up during iteration. This patch implements dead flag which gets set on deletion so that iteration can skip already deleted entries. The dead flag piggy backs on the lowest bit of knode->n_klist and only visible to klist implementation proper. While at it, drop klist_iter->i_head as it's redundant and doesn't offer anything in semantics or performance wise as klist_iter->i_klist is dereferenced on every iteration anyway. Signed-off-by: NTejun Heo <tj@kernel.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Randy Dunlap 提交于
Add some block/ source files to the kernel-api docbook. Fix kernel-doc notation in them as needed. Fix changed function parameter names. Fix typos/spellos. In comments, change REQ_SPECIAL to REQ_TYPE_SPECIAL and REQ_BLOCK_PC to REQ_TYPE_BLOCK_PC. Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
raid5 can overflow with more than 255 stripes, and we can increase it to an int for free on both 32 and 64-bit archs due to the padding. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Mikulas Patocka 提交于
Remove hw_segments field from struct bio and struct request. Without virtual merge accounting they have no purpose. Signed-off-by: NMikulas Patocka <mpatocka@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Mikulas Patocka 提交于
Remove virtual merge accounting. Signed-off-by: NMikulas Patocka <mpatocka@redhat.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Aaron Carroll 提交于
Update the description of fifo_batch to match the current implementation, and include a description of how to tune it. Signed-off-by: NAaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Aaron Carroll 提交于
* convert goto to simpler while loop; * use rq_end_sector() instead of computing manually; * fix false comments; * remove spurious whitespace; * convert rq_rb_root macro to an inline function. Signed-off-by: NAaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Aaron Carroll 提交于
Deadline currently only batches sector-contiguous requests, so except for a few circumstances (e.g. requests in a single direction), it is essentially first come first served. This is bad for throughput, so change it to CSCAN, which means requests in a batch do not need to be sequential and are issued in increasing sector order. Signed-off-by: NAaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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struct request has an ioprio member but it is never updated because currently bios do not hold io context information. The implication of this is that virtio_blk ends up passing useless information to the backend driver. That said, some IO schedulers such as CFQ do store io context information in struct request, but use private members for that, which means that that information cannot be directly accessed in a IO scheduler-independent way. This patch adds a function to obtain the ioprio of a request. We should avoid accessing ioprio directly and use this function instead, so that its users do not have to care about future changes in block layer structures or what the currently active IO controller is. This patch does not introduce any functional changes but paves the way for future clean-ups and enhancements. Signed-off-by: NFernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Acked-by: NRusty Russell <rusty@rustcorp.com.au> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
It was only used by ps3disk, and it should probably have been REQ_TYPE_LINUX_BLOCK + REQ_LB_OP_FLUSH. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
But blkdev_issue_discard() still emits requests which are interpreted as soft barriers, because naïve callers might otherwise issue subsequent writes to those same sectors, which might cross on the queue (if they're reallocated quickly enough). Callers still _can_ issue non-barrier discard requests, but they have to take care of queue ordering for themselves. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
We may well want mkfs tools to use this to mark the whole device as unwanted before they format it, for example. The ioctl takes a pair of uint64_ts, which are start offset and length in _bytes_. Although at the moment it might make sense for them both to be in 512-byte sectors, I don't want to limit the ABI to that. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 OGAWA Hirofumi 提交于
Barriers should be submitted with the WRITE flag set. Signed-off-by: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
Let the compiler see what's going on, and it can all get a lot simpler. On PPC64 this reduces the size of the code calculating these bits by about 60%. On x86_64 it's less of a win -- only 40%. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
We can benefit from knowing that the file system no longer cares about the contents of certain sectors, by throwing them away immediately and then never having to garbage collect them, and using the extra free space to make our operations more efficient. Do so. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
[hirofumi@mail.parknet.co.jp: discard _after_ checking for corrupt chains] Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Acked-by: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
Some block devices benefit from a hint that they can forget the contents of certain sectors. Add basic support for this to the block core, along with a 'blkdev_issue_discard()' helper function which issues such requests. The caller doesn't get to provide an end_io functio, since blkdev_issue_discard() will automatically split the request up into multiple bios if appropriate. Neither does the function wait for completion -- it's expected that callers won't care about when, or even _if_, the request completes. It's only a hint to the device anyway. By definition, the file system doesn't _care_ about these sectors any more. [With feedback from OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> and Jens Axboe <jens.axboe@oracle.com] Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 David Woodhouse 提交于
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 Jens Axboe 提交于
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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由 xiphmont@xiph.org 提交于
I have another request for the block filter SG_IO command whitelist, specifically the MMC streaming command set SET READ AHEAD command. The command applies only to MMC CDROM/DVDROM drives with the streaming optional feature set. The command is useful to cdparanoia in that it allows explicit cache control side effects that are, on many drives, cdparanoia's most efficient way to flush/disable the media cache on cdrom drives. I am aware of no reason why it should not be accessible from usespace. Also note that the command is already fully accessible through the SCSI-native version of the SG_IO ioctl as well as the traditional SG interface. The command is only being refused on block devices. That means that on a typical stock distro, the command is available through /dev/sg* but not /dev/scd* although both are typically available and accessible. Filtering the command is not providing any protection, only a confusing inconsistency. Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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git://ftp.linux-mips.org/pub/scm/upstream-linus由 Linus Torvalds 提交于
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Sibyte: Register PIO PATA device only for Swarm and Litte Sur
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6由 Linus Torvalds 提交于
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: tcp: Fix tcp_hybla zero congestion window growth with small rho and large cwnd. net: Fix netdev_run_todo dead-lock tcp: Fix possible double-ack w/ user dma net: only invoke dev->change_rx_flags when device is UP netrom: Fix sock_orphan() use in nr_release ax25: Quick fix for making sure unaccepted sockets get destroyed. Revert "ax25: Fix std timer socket destroy handling." [Bluetooth] Add reset quirk for A-Link BlueUSB21 dongle [Bluetooth] Add reset quirk for new Targus and Belkin dongles [Bluetooth] Fix double frees on error paths of btusb and bpa10x drivers
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由 Ralf Baechle 提交于
Symbol name spaghetti which is too complicated to cleanup on this stage of the release cycle breaks the build on BCM1480 platforms. Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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- 08 10月, 2008 6 次提交
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由 Daniele Lacamera 提交于
Because of rounding, in certain conditions, i.e. when in congestion avoidance state rho is smaller than 1/128 of the current cwnd, TCP Hybla congestion control starves and the cwnd is kept constant forever. This patch forces an increment by one segment after #send_cwnd calls without increments(newreno behavior). Signed-off-by: NDaniele Lacamera <root@danielinux.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Herbert Xu 提交于
Benjamin Thery tracked down a bug that explains many instances of the error unregister_netdevice: waiting for %s to become free. Usage count = %d It turns out that netdev_run_todo can dead-lock with itself if a second instance of it is run in a thread that will then free a reference to the device waited on by the first instance. The problem is really quite silly. We were trying to create parallelism where none was required. As netdev_run_todo always follows a RTNL section, and that todo tasks can only be added with the RTNL held, by definition you should only need to wait for the very ones that you've added and be done with it. There is no need for a second mutex or spinlock. This is exactly what the following patch does. Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Ali Saidi 提交于
From: Ali Saidi <saidi@engin.umich.edu> When TCP receive copy offload is enabled it's possible that tcp_rcv_established() will cause two acks to be sent for a single packet. In the case that a tcp_dma_early_copy() is successful, copied_early is set to true which causes tcp_cleanup_rbuf() to be called early which can send an ack. Further along in tcp_rcv_established(), __tcp_ack_snd_check() is called and will schedule a delayed ACK. If no packets are processed before the delayed ack timer expires the packet will be acked twice. Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Patrick McHardy 提交于
Jesper Dangaard Brouer <hawk@comx.dk> reported a bug when setting a VLAN device down that is in promiscous mode: When the VLAN device is set down, the promiscous count on the real device is decremented by one by vlan_dev_stop(). When removing the promiscous flag from the VLAN device afterwards, the promiscous count on the real device is decremented a second time by the vlan_change_rx_flags() callback. The root cause for this is that the ->change_rx_flags() callback is invoked while the device is down. The synchronization is meant to mirror the behaviour of the ->set_rx_mode callbacks, meaning the ->open function is responsible for doing a full sync on open, the ->close() function is responsible for doing full cleanup on ->stop() and ->change_rx_flags() is meant to do incremental changes while the device is UP. Only invoke ->change_rx_flags() while the device is UP to provide the intended behaviour. Tested-by: NJesper Dangaard Brouer <jdb@comx.dk> Signed-off-by: NPatrick McHardy <kaber@trash.net> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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由 Matt Mackall 提交于
SLOB's ksize calculation was braindamaged and generally harmlessly underreported the allocation size. But for very small buffers, it could in fact overreport them, leading code depending on krealloc to overrun the allocation and trample other data. Signed-off-by: NMatt Mackall <mpm@selenic.com> Tested-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 07 10月, 2008 5 次提交
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由 Linus Torvalds 提交于
This reverts commit 135aedc3, as requested by Hans Verkuil. It was a patch for 2.6.28 where the BKL was pushed down from v4l core to the drivers, not for 2.6.27! Requested-by: NHans Verkuil <hverkuil@xs4all.nl> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Signed-of-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Linus Torvalds 提交于
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由 Mathieu Desnoyers 提交于
* Theodore Ts'o (tytso@mit.edu) wrote: > > I've been playing with adding some markers into ext4 to see if they > could be useful in solving some problems along with Systemtap. It > appears, though, that as of 2.6.27-rc8, markers defined in code which is > compiled directly into the kernel (i.e., not as modules) don't show up > in Module.markers: > > kvm_trace_entryexit arch/x86/kvm/kvm-intel %u %p %u %u %u %u %u %u > kvm_trace_handler arch/x86/kvm/kvm-intel %u %p %u %u %u %u %u %u > kvm_trace_entryexit arch/x86/kvm/kvm-amd %u %p %u %u %u %u %u %u > kvm_trace_handler arch/x86/kvm/kvm-amd %u %p %u %u %u %u %u %u > > (Note the lack of any of the kernel_sched_* markers, and the markers I > added for ext4_* and jbd2_* are missing as wel.) > > Systemtap apparently depends on in-kernel trace_mark being recorded in > Module.markers, and apparently it's been claimed that it used to be > there. Is this a bug in systemtap, or in how Module.markers is getting > built? And is there a file that contains the equivalent information > for markers located in non-modules code? I think the problem comes from "markers: fix duplicate modpost entry" (commit d35cb360) Especially : - add_marker(mod, marker, fmt); + if (!mod->skip) + add_marker(mod, marker, fmt); } return; fail: Here is a fix that should take care if this problem. Thanks for the bug report! Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Tested-by: N"Theodore Ts'o" <tytso@mit.edu> CC: Greg KH <greg@kroah.com> CC: David Smith <dsmith@redhat.com> CC: Roland McGrath <roland@redhat.com> CC: Sam Ravnborg <sam@ravnborg.org> CC: Wenji Huang <wenji.huang@oracle.com> CC: Takashi Nishiie <t-nishiie@np.css.fujitsu.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb由 Linus Torvalds 提交于
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/linux-2.6-kgdb: kgdb: call touch_softlockup_watchdog on resume kgdb, x86: Avoid invoking kgdb_nmicallback twice per NMI
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由 Linus Torvalds 提交于
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: gart iommu have direct mapping when agp is present too
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