- 24 2月, 2010 28 次提交
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由 Amit Shah 提交于
Adding support for generic ports that will write to userspace will need some code changes. Consolidate the write routine into send_buf() and put_chars() now just calls into the new function. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
In preparation for serving data to userspace (generic ports) as well as in-kernel users (hvc consoles), separate out the functionality common to both in a 'fill_readbuf()' function. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
With support for multiple ports, each port will have its own input and output vqs. Prepare the probe function for this change. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
Console ports could be hot-added. Also, with the new multiport support, a port is identified as a console port only if the host sends a control message. Move the console port init into a separate function so it can be invoked from other places. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
Move out console-specific stuff into a separate struct from 'struct port' as we need to maintain two lists: one for all the ports (which includes consoles) and one only for consoles since the hvc callbacks only give us the vtermno. This makes console handling cleaner. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
When multiple console support is added, ensure each port's size gets updated when a new one is opened via hvc. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
Rather than assume a single port, add a 'struct ports_device' which stores data related to all the ports for that device. Currently, there's only one port and is hooked up with hvc, but that will change. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
Now we can use an allocation function to remove our global console variable. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
Keep a list of all ports being used as a console, and provide a lock and a lookup function. The hvc callbacks only give us a vterm number, so we need to map this. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
Part of removing our "one console" assumptions, use vdev->priv to point to the port (currently == the global console). Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
This makes taking locks around the get_buf vq operation easier, as well as complements the add_inbuf() operation. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
add_inbuf() assumed one port and one inbuf per port. Remove that assumption. Also move the function so that put_chars and get_chars are together. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
Collect port buffer, used_len, offset fields into a single structure. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
We are heading towards a multiple-"port" system, so as part of weaning off globals we encapsulate the information into 'struct port'. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
We support only one virtio_console device at a time. If multiple are found, error out if one is already initialized. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
This is nicer for modern R/O protection. And noone needs it non-const, so constify the callers as well. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAmit Shah <amit.shah@redhat.com> To: Christian Borntraeger <borntraeger@de.ibm.com> Cc: linuxppc-dev@ozlabs.org
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由 Rusty Russell 提交于
That way, we can make it const as is good kernel style. We use a separate indirection for the early console, rather than mugging ops.put_chars. We rename it hv_ops, too. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
Remove old lguest-style comments. [Amit: - wingify comments acc. to kernel style - indent comments ] Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Amit Shah 提交于
vq operations depend on vq->data[i] being NULL to figure out if the vq entry is in use (since the previous patch). We have to initialize them to NULL to ensure we don't work with junk data and trigger false BUG_ONs. Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Cc: Shirley Ma <xma@us.ibm.com>
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由 Shirley Ma 提交于
There's currently no way for a virtio driver to ask for unused buffers, so it has to keep a list itself to reclaim them at shutdown. This is redundant, since virtio_ring stores that information. So add a new hook to do this. Signed-off-by: NShirley Ma <xma@us.ibm.com> Signed-off-by: NAmit Shah <amit.shah@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Christoph Hellwig 提交于
Allow reading various alignment values from the config page. This allows the guest to much better align I/O requests depending on the storage topology. Note that the formats for the config values appear a bit messed up, but we follow the formats used by ATA and SCSI so they are expected in the storage world. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Michael S. Tsirkin 提交于
virtio is communicating with a virtual "device" that actually runs on another host processor. Thus SMP barriers can be used to control memory access ordering. Where possible, we should use SMP barriers which are more lightweight than mandatory barriers, because mandatory barriers also control MMIO effects on accesses through relaxed memory I/O windows (which virtio does not use) (compare specifically smp_rmb and rmb on x86_64). We can't just use smp_mb and friends though, because we must force memory ordering even if guest is UP since host could be running on another CPU, but SMP barriers are defined to barrier() in that configuration. So, for UP fall back to mandatory barriers instead. Signed-off-by: NMichael S. Tsirkin <mst@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
With DEBUG defined, we add an ->in_use flag to detect if the caller invokes two virtio methods in parallel. The barriers attempt to ensure timely update of the ->in_use flag. But they're voodoo: if we need these barriers it implies that the calling code doesn't have sufficient synchronization to ensure the code paths aren't invoked at the same time anyway, and we want to detect it. Also, adding barriers changes timing, so turning on debug has more chance of hiding real problems. Thanks to MST for drawing my attention to this code... CC: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
Two years ago 5bbf89fc removed the horrible bzImage unpacking code. Now it's time to remove the unneeded zlib.h include, too. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Rusty Russell 提交于
When running under qemu-kvm-0.11.0: BUG: unable to handle kernel paging request at 56e58955 ... Process vballoon (pid: 1297, ti=c7976000 task=c70a6ca0 task.ti=c7 ... Call Trace: [<c88253a3>] ? balloon+0x1b3/0x440 [virtio_balloon] [<c041c2d7>] ? schedule+0x327/0x9d0 [<c88251f0>] ? balloon+0x0/0x440 [virtio_balloon] [<c014a2d4>] ? kthread+0x74/0x80 [<c014a260>] ? kthread+0x0/0x80 [<c0103b36>] ? kernel_thread_helper+0x6/0x30 need_stats_update should be zero-initialized. Signed-off-by: NRusty Russell <rusty@rustcorp.com.au> Acked-by: NAdam Litke <agl@us.ibm.com>
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由 Adam Litke 提交于
This is a fix for my earlier patch: "virtio: Add memory statistics reporting to the balloon driver (V4)". I discovered that all_vm_events() can sleep and therefore stats collection cannot be done in interrupt context. One solution is to handle the interrupt by noting that stats need to be collected and waking the existing vballoon kthread which will complete the work via stats_handle_request(). Rusty, is this a saner way of doing business? There is one issue that I would like a broader opinion on. In stats_request, I update vb->need_stats_update and then wake up the kthread. The kthread uses vb->need_stats_update as a condition variable. Do I need a memory barrier between the update and wake_up to ensure that my kthread sees the correct value? My testing suggests that it is not needed but I would like some confirmation from the experts. Signed-off-by: NAdam Litke <agl@us.ibm.com> To: Rusty Russell <rusty@rustcorp.com.au> Cc: Anthony Liguori <aliguori@linux.vnet.ibm.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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由 Adam Litke 提交于
Changes since V3: - Do not do endian conversions as they will be done in the host - Report stats that reference a quantity of memory in bytes - Minor coding style updates Changes since V2: - Increase stat field size to 64 bits - Report all sizes in kb (not pages) - Drop anon_pages stat and fix endianness conversion Changes since V1: - Use a virtqueue instead of the device config space When using ballooning to manage overcommitted memory on a host, a system for guests to communicate their memory usage to the host can provide information that will minimize the impact of ballooning on the guests. The current method employs a daemon running in each guest that communicates memory statistics to a host daemon at a specified time interval. The host daemon aggregates this information and inflates and/or deflates balloons according to the level of host memory pressure. This approach is effective but overly complex since a daemon must be installed inside each guest and coordinated to communicate with the host. A simpler approach is to collect memory statistics in the virtio balloon driver and communicate them directly to the hypervisor. This patch enables the guest-side support by adding stats collection and reporting to the virtio balloon driver. Signed-off-by: NAdam Litke <agl@us.ibm.com> Cc: Anthony Liguori <anthony@codemonkey.ws> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (minor fixes)
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由 Jamie Lokier 提交于
This is needed to compile with CONFIG_VIRTIO_PCI=y, because virtio_pci_remove is marked __devexit. Signed-off-by: NJamie Lokier <jamie@shareable.org> Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
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- 23 2月, 2010 12 次提交
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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: BCM47xx: Fix 128MB RAM support MIPS: Highmem: Fix build error
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由 Linus Torvalds 提交于
Merge branch 'parisc/tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland * 'parisc/tracehook' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland: Revert "parisc: HAVE_ARCH_TRACEHOOK"
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由 Michael Neuling 提交于
803bf5ec ("fs/exec.c: restrict initial stack space expansion to rlimit") attempts to limit the initial stack to 20*PAGE_SIZE. Unfortunately, in attempting ensure the stack is not reduced in size, we ended up not changing the stack at all. This size reduction check is not necessary as the expand_stack call does this already. This caused a regression in UML resulting in most guest processes being killed. Signed-off-by: NMichael Neuling <mikey@neuling.org> Reviewed-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: NWANG Cong <xiyou.wangcong@gmail.com> Cc: Anton Blanchard <anton@samba.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: James Morris <jmorris@namei.org> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jouni Malinen <j@w1.fi> Cc: <stable@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Marcin Slusarz 提交于
Commit 4410f391 ("fbdev: add support for handoff from firmware to hw framebuffers") didn't add fb_destroy operation to efifb. Fix it and change aperture_size to match size passed to request_mem_region. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=15151Signed-off-by: NMarcin Slusarz <marcin.slusarz@gmail.com> Reported-by: NAlex Zhavnerchik <alex.vizor@gmail.com> Tested-by: NAlex Zhavnerchik <alex.vizor@gmail.com> Acked-by: NPeter Jones <pjones@redhat.com> Cc: Huang Ying <ying.huang@intel.com> Cc: Dave Airlie <airlied@redhat.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Jens Rottmann 提交于
geode-mfgpt: restore previous behavior for selecting IRQ The MFGPT IRQ used to be, in order of decreasing priority, * IRQ supplied by the user as a boot-time parameter, * IRQ previously set by the BIOS or another driver, * default IRQ given at compile time. Return to this behavior, which got broken when splitting the MFGPT/clocksource driver for 2.6.33-rc1. Signed-off-by: NJens Rottmann <JRottmann@LiPPERTEmbedded.de> Acked-by: NAndres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Acked-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Tejun Heo 提交于
This is retry of reverted 859ddf09 ("idr: fix a critical misallocation bug") which contained two bugs. * pa[idp->layers] should be cleared even if it's not used by sub_alloc() because it's used by mark idr_mark_full(). * The original condition check also assigned pa[l] to p which the new code didn't do thus leaving p pointing at the wrong layer. Both problems have been fixed and the idr code has received good amount testing using userland testing setup where simple bitmap allocator is run parallel to verify the result of idr allocation. The bug this patch fixes is caused by sub_alloc() optimization path bypassing out-of-room condition check and restarting allocation loop with starting value higher than maximum allowed value. For detailed description, please read commit message of 859ddf09. Signed-off-by: NTejun Heo <tj@kernel.org> Based-on-patch-from: Eric Paris <eparis@redhat.com> Reported-by: NEric Paris <eparis@redhat.com> Tested-by: NStefan Lippers-Hollmann <s.l-h@gmx.de> Tested-by: NSerge Hallyn <serue@us.ibm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Tetsuo Handa 提交于
find_task_by_vpid() is not safe without rcu_read_lock(). 2.6.33-rc7 got RCU protection for sys_setpriority() but missed it for sys_getpriority(). Signed-off-by: NTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Acked-by: NSerge Hallyn <serue@us.ibm.com> Acked-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 KAMEZAWA Hiroyuki 提交于
Presently the oom-killer is memcg aware and it finds the worst process from processes under memcg(s) in oom. Then, it kills victim's child first. It may kill a child in another cgroup and may not be any help for recovery. And it will break the assumption users have. This patch fixes it. Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Reviewed-by: NMinchan Kim <minchan.kim@gmail.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Reviewed-by: NDaisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Acked-by: NDavid Rientjes <rientjes@google.com> Cc: <stable@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Hauke Mehrtens 提交于
Ignoring the last page when ddr size is 128M. Cached accesses to last page is causing the processor to prefetch using address above 128M stepping out of the DDR address space. Signed-off-by: NHauke Mehrtens <hauke@hauke-m.de> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/981/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Yoichi Yuasa 提交于
arch/mips/mm/highmem.c: In function 'kmap_init': arch/mips/mm/highmem.c:130: error: 'init_mm' undeclared (first use in this function) arch/mips/mm/highmem.c:130: error: (Each undeclared identifier is reported only once arch/mips/mm/highmem.c:130: error: for each function it appears in.) Signed-off-by: NYoichi Yuasa <yuasa@linux-mips.org> Cc: linux-mips <linux-mips@linux-mips.org> Patchwork: http://patchwork.linux-mips.org/patch/980/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
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由 Roland McGrath 提交于
This reverts commit 81bf550d. HAVE_ARCH_TRACEHOOK requires defining the user_regset interfaces, including task_user_regset_view(). parisc doesn't do that yet, so don't lie about it. Signed-off-by: NRoland McGrath <roland@redhat.com>
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由 Linus Torvalds 提交于
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf probe: Init struct probe_point and set counter correctly hw-breakpoint: Keep track of dr7 local enable bits hw-breakpoints: Accept breakpoints on NULL address perf_events: Fix FORK events
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