- 28 May, 2015 1 commit
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Luis Henriques authored
Signed-off-by:Luis Henriques <luis.henriques@canonical.com>
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- 27 May, 2015 1 commit
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Eric Work authored
commit a8115776 upstream. The variable "sector" in "raid0_make_request()" was improperly updated by a call to "sector_div()" which modifies its first argument in place. Commit 47d68979 restored this variable after the call for later re-use. Unfortunetly the restore was done after the referenced variable "bio" was advanced. This lead to the original value and the restored value being different. Here we move this line to the proper place. One observed side effect of this bug was discarding a file though unlinking would cause an unrelated file's contents to be discarded. Signed-off-by:
NeilBrown <neilb@suse.de> Fixes: 47d68979 ("md/raid0: fix bug with chunksize not a power of 2.") URL: https://bugzilla.kernel.org/show_bug.cgi?id=98501 Cc: Philip Müller <philm@manjaro.org> Signed-off-by:
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- 20 May, 2015 38 commits
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Dave Chinner authored
commit 5885ebda upstream. A new fsync vs power fail test in xfstests indicated that XFS can have unreliable data consistency when doing extending truncates that require block zeroing. The blocks beyond EOF get zeroed in memory, but we never force those changes to disk before we run the transaction that extends the file size and exposes those blocks to userspace. This can result in the blocks not being correctly zeroed after a crash. Because in-memory behaviour is correct, tools like fsx don't pick up any coherency problems - it's not until the filesystem is shutdown or the system crashes after writing the truncate transaction to the journal but before the zeroed data in the page cache is flushed that the issue is exposed. Fix this by also flushing the dirty data in memory region between the old size and new size when we've found blocks that need zeroing in the truncate process. Reported-by:
Liu Bo <bo.li.liu@oracle.com> Signed-off-by:
Dave Chinner <dchinner@redhat.com> Reviewed-by:
Brian Foster <bfoster@redhat.com> Signed-off-by:
Dave Chinner <david@fromorbit.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by:
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Chuck Lever authored
commit 5ae711a2 upstream. If ib_query_qp() fails or the memory registration mode isn't supported, don't leak the PD. An orphaned IB/core resource will cause IB module removal to hang. Fixes: bd7ed1d1 ("RPC/RDMA: check selected memory registration ...") Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Reviewed-by:
Steve Wise <swise@opengridcomputing.com> Signed-off-by:
Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by:
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Peter Zijlstra authored
commit 1fe89e1b upstream. Because task_group() uses a cache of autogroup_task_group(), whose output depends on sched_class, switching classes can generate problems. In particular, when started as fair, the cache points to the autogroup, so when switching to RT the tg_rt_schedulable() test fails for every cpu.rt_{runtime,period}_us change because now the autogroup has tasks and no runtime. Furthermore, going back to the previous semantics of varying task_group() with sched_class has the down-side that the sched_debug output varies as well, even though the task really is in the autogroup. Therefore add an autogroup exception to tg_has_rt_tasks() -- such that both (all) task_group() usages in sched/core now have one. And remove all the remnants of the variable task_group() output. Reported-by:
Zefan Li <lizefan@huawei.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <umgwanakikbuti@gmail.com> Cc: Stefan Bader <stefan.bader@canonical.com> Fixes: 8323f26c ("sched: Fix race in task_group()") Link: http://lkml.kernel.org/r/20150209112237.GR5029@twins.programming.kicks-ass.netSigned-off-by:
Ingo Molnar <mingo@kernel.org> [ luis: backported to 3.16: adjusted context ] Signed-off-by:
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Yann Droneaud authored
commit d6c763af upstream. Since commit 8a0a9bd4 ('random: make get_random_int() more random'), get_random_int() returns a random value for each call, so comment and hack introduced in mmap_rnd() as part of commit 1d18c47c ('arm64: MMU fault handling and page table management') are incorrects. Commit 1d18c47c seems to use the same hack introduced by commit a5adc91a ('powerpc: Ensure random space between stack and mmaps'), latter copied in commit 5a0efea0 ('sparc64: Sharpen address space randomization calculations.'). But both architectures were cleaned up as part of commit fa8cbaaf ('powerpc+sparc64/mm: Remove hack in mmap randomize layout') as hack is no more needed since commit 8a0a9bd4. So the present patch removes the comment and the hack around get_random_int() on AArch64's mmap_rnd(). Cc: David S. Miller <davem@davemloft.net> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
Will Deacon <will.deacon@arm.com> Acked-by:
Dan McGee <dpmcgee@gmail.com> Signed-off-by:
Yann Droneaud <ydroneaud@opteya.com> Signed-off-by:
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Patrick McHardy authored
commit 16c45eda upstream. Fix a race condition and unnecessary locking: * the root rb_node must only be accessed under the lock in nft_rbtree_lookup() * the lock is not needed in lookup functions in netlink context Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Pablo Neira Ayuso authored
commit d6b6cb1d upstream. If there's an existing base chain, we have to allow to change the default policy without indicating the hook information. However, if the chain doesn't exists, we have to enforce the presence of the hook attribute. Signed-off-by:
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Pablo Neira Ayuso authored
commit 749177cc upstream. ip6tables extensions check for this flag to restrict match/target to a given protocol. Without this flag set, SYNPROXY6 returns an error. Signed-off-by:
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Patrick McHardy authored
commit 9889840f upstream. Check that the space required for the expressions doesn't exceed the size of the dlen field, which would lead to the iterators crashing. Signed-off-by:
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Ian Wilson authored
commit 78146572 upstream. nfnl_cthelper_parse_tuple() is called from nfnl_cthelper_new(), nfnl_cthelper_get() and nfnl_cthelper_del(). In each case they pass a pointer to an nf_conntrack_tuple data structure local variable: struct nf_conntrack_tuple tuple; ... ret = nfnl_cthelper_parse_tuple(&tuple, tb[NFCTH_TUPLE]); The problem is that this local variable is not initialized, and nfnl_cthelper_parse_tuple() only initializes two fields: src.l3num and dst.protonum. This leaves all other fields with undefined values based on whatever is on the stack: tuple->src.l3num = ntohs(nla_get_be16(tb[NFCTH_TUPLE_L3PROTONUM])); tuple->dst.protonum = nla_get_u8(tb[NFCTH_TUPLE_L4PROTONUM]); The symptom observed was that when the rpc and tns helpers were added then traffic to port 1536 was being sent to user-space. Signed-off-by:
Ian Wilson <iwilson@brocade.com> Signed-off-by:
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Pablo Neira Ayuso authored
commit 59900e0a upstream. In general, if a transaction object is added to the list successfully, we can rely on the abort path to undo what we've done. This allows us to simplify the error handling of the rule replacement path in nf_tables_newrule(). This implicitly fixes an unnecessary removal of the old rule, which needs to be left in place if we fail to replace. Signed-off-by:
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Ilya Dryomov authored
commit 45002267 upstream. Crush temporary buffers are allocated as per replica size configured by the user. When there are more final osds (to be selected as per rule) than the replicas, buffer overlaps and it causes crash. Now, it ensures that at most num-rep osds are selected even if more number of osds are allowed by the rule. Reflects ceph.git commits 6b4d1aa99718e3b367496326c1e64551330fabc0, 234b066ba04976783d15ff2abc3e81b6cc06fb10. Signed-off-by:
Ilya Dryomov <idryomov@gmail.com> Signed-off-by:
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Lv Zheng authored
commit 1d0a0b2f upstream. ACPICA commit b60612373a4ef63b64a57c124576d7ddb6d8efb6 For physical addresses, since the address may exceed 32-bit address range after calculation, we should use 0x%8.8X%8.8X instead of ACPI_PRINTF_UINT and ACPI_FORMAT_UINT64() instead of ACPI_FORMAT_NATIVE_UINT()/ACPI_FORMAT_TO_UINT(). This patch also removes above replaced macros as there are no users. This is a preparation to switch acpi_physical_address to 64-bit on 32-bit kernel builds. Link: https://github.com/acpica/acpica/commit/b6061237Signed-off-by:
Lv Zheng <lv.zheng@intel.com> Signed-off-by:
Bob Moore <robert.moore@intel.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: George G. Davis <ggdavisiv@gmail.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by:
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Lv Zheng authored
commit cc2080b0 upstream. ACPICA commit 7f06739db43a85083a70371c14141008f20b2198 For physical addresses, since the address may exceed 32-bit address range after calculation, we should use %8.8X%8.8X (see ACPI_FORMAT_UINT64()) to convert the %p formats. This is a preparation to switch acpi_physical_address to 64-bit on 32-bit kernel builds. Link: https://github.com/acpica/acpica/commit/7f06739dSigned-off-by:
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Lv Zheng authored
commit 6d3fd3cc upstream. ACPICA commit 154f6d074dd38d6ebc0467ad454454e6c5c9ecdf There are code pieces converting pointers using "(acpi_physical_address) x" or "ACPI_CAST_PTR (t, x)" formats, this patch cleans up them. Known issues: 1. Cleanup of "(ACPI_PHYSICAL_ADDRRESS) x" for a table field For the conversions around the table fields, it is better to fix it with alignment also fixed. So this patch doesn't modify such code. There should be no functional problem by leaving them unchanged. Link: https://github.com/acpica/acpica/commit/154f6d07Signed-off-by:
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Lv Zheng authored
commit f254e3c5 upstream. ACPICA commit 7d9fd64397d7c38899d3dc497525f6e6b044e0e3 OSPMs like Linux expect an acpi_physical_address returning value from acpi_find_root_pointer(). This triggers warnings if sizeof (acpi_size) doesn't equal to sizeof (acpi_physical_address): drivers/acpi/osl.c:275:3: warning: passing argument 1 of 'acpi_find_root_pointer' from incompatible pointer type [enabled by default] In file included from include/acpi/acpi.h:64:0, from include/linux/acpi.h:36, from drivers/acpi/osl.c:41: include/acpi/acpixf.h:433:1: note: expected 'acpi_size *' but argument is of type 'acpi_physical_address *' This patch corrects acpi_find_root_pointer(). Link: https://github.com/acpica/acpica/commit/7d9fd643Signed-off-by:
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Lv Zheng authored
commit 2b876010 upstream. ACPICA commit aacf863cfffd46338e268b7415f7435cae93b451 It is reported that on a physically 64-bit addressed machine, 32-bit kernel can trigger crashes in accessing the memory regions that are beyond the 32-bit boundary. The region field's start address should still be 32-bit compliant, but after a calculation (adding some offsets), it may exceed the 32-bit boundary. This case is rare and buggy, but there are real BIOSes leaked with such issues (see References below). This patch fixes this gap by always defining IO addresses as 64-bit, and allows OSPMs to optimize it for a real 32-bit machine to reduce the size of the internal objects. Internal acpi_physical_address usages in the structures that can be fixed by this change include: 1. struct acpi_object_region: acpi_physical_address address; 2. struct acpi_address_range: acpi_physical_address start_address; acpi_physical_address end_address; 3. struct acpi_mem_space_context; acpi_physical_address address; 4. struct acpi_table_desc acpi_physical_address address; See known issues 1 for other usages. Note that acpi_io_address which is used for ACPI_PROCESSOR may also suffer from same problem, so this patch changes it accordingly. For iasl, it will enforce acpi_physical_address as 32-bit to generate 32-bit OSPM compatible tables on 32-bit platforms, we need to define ACPI_32BIT_PHYSICAL_ADDRESS for it in acenv.h. Known issues: 1. Cleanup of mapped virtual address In struct acpi_mem_space_context, acpi_physical_address is used as a virtual address: acpi_physical_address mapped_physical_address; It is better to introduce acpi_virtual_address or use acpi_size instead. This patch doesn't make such a change. Because this should be done along with a change to acpi_os_map_memory()/acpi_os_unmap_memory(). There should be no functional problem to leave this unchanged except that only this structure is enlarged unexpectedly. Link: https://github.com/acpica/acpica/commit/aacf863c Reference: https://bugzilla.kernel.org/show_bug.cgi?id=87971 Reference: https://bugzilla.kernel.org/show_bug.cgi?id=79501Reported-and-tested-by:
Paul Menzel <paulepanter@users.sourceforge.net> Reported-and-tested-by:
Sial Nije <sialnije@gmail.com> Signed-off-by:
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Doug Anderson authored
commit c5272a28 upstream. Way back, when the world was a simpler place and there was no war, no evil, and no kernel bugs, there was just a single pinctrl lock. That was how the world was when (57291ce2 pinctrl: core device tree mapping table parsing support) was written. In that case, there were instances where the pinctrl mutex was already held when pinctrl_register_map() was called, hence a "locked" parameter was passed to the function to indicate that the mutex was already locked (so we shouldn't lock it again). A few years ago in (42fed7ba pinctrl: move subsystem mutex to pinctrl_dev struct), we switched to a separate pinctrl_maps_mutex. ...but (oops) we forgot to re-think about the whole "locked" parameter for pinctrl_register_map(). Basically the "locked" parameter appears to still refer to whether the bigger pinctrl_dev mutex is locked, but we're using it to skip locks of our (now separate) pinctrl_maps_mutex. That's kind of a bad thing(TM). Probably nobody noticed because most of the calls to pinctrl_register_map happen at boot time and we've got synchronous device probing. ...and even cases where we're asynchronous don't end up actually hitting the race too often. ...but after banging my head against the wall for a bug that reproduced 1 out of 1000 reboots and lots of looking through kgdb, I finally noticed this. Anyway, we can now safely remove the "locked" parameter and go back to a war-free, evil-free, and kernel-bug-free world. Fixes: 42fed7ba ("pinctrl: move subsystem mutex to pinctrl_dev struct") Signed-off-by:
Doug Anderson <dianders@chromium.org> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Chuanxiao Dong authored
commit 4e93b9a6 upstream. During kernel boot, it will try to read some logical sectors of each block device node for the possible partition table. But since RPMB partition is special and can not be accessed by normal eMMC read / write CMDs, it will cause below error messages during kernel boot: ... mmc0: Got data interrupt 0x00000002 even though no data operation was in progress. mmcblk0rpmb: error -110 transferring data, sector 0, nr 32, cmd response 0x900, card status 0xb00 mmcblk0rpmb: retrying using single block read mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 end_request: I/O error, dev mmcblk0rpmb, sector 0 Buffer I/O error on device mmcblk0rpmb, logical block 0 end_request: I/O error, dev mmcblk0rpmb, sector 8 Buffer I/O error on device mmcblk0rpmb, logical block 1 end_request: I/O error, dev mmcblk0rpmb, sector 16 Buffer I/O error on device mmcblk0rpmb, logical block 2 end_request: I/O error, dev mmcblk0rpmb, sector 24 Buffer I/O error on device mmcblk0rpmb, logical block 3 ... This patch will discard the access request in eMMC queue if it is RPMB partition access request. By this way, it avoids trigger above error messages. Fixes: 090d25fe ("mmc: core: Expose access to RPMB partition") Signed-off-by:
Yunpeng Gao <yunpeng.gao@intel.com> Signed-off-by:
Chuanxiao Dong <chuanxiao.dong@intel.com> Tested-by:
Michael Shigorin <mike@altlinux.org> Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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Takeshi Kihara authored
commit bad4371d upstream. f9fd54f2 ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout") changed the timeout value from 1000 jiffies to 1s. In the case where HZ is 1000 the values are the same. However, for smaller HZ values the timeout is now smaller, 1s instead of 10s in the case of HZ=100. Since the timeout occurs in spite of a normal data transfer a timeout of 10s seems more appropriate. This restores the previous timeout in the case where HZ=100 and results in an increase over the previous timeout for larger values of HZ. Fixes: f9fd54f2 ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout") Signed-off-by:
Takeshi Kihara <takeshi.kihara.df@renesas.com> [horms: rewrote changelog to refer to HZ] Signed-off-by:
Simon Horman <horms+renesas@verge.net.au> Signed-off-by:
Yoshihiro Kaneko <ykaneko0929@gmail.com> Signed-off-by:
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Grygorii Strashko authored
commit 184af16b upstream. The PM_RESTORE_PREPARE is not handled now in mmc_pm_notify(), as result mmc_rescan() could be scheduled and executed at late hibernation restore stages when MMC device is suspended already - which, in turn, will lead to system crash on TI dra7-evm board: WARNING: CPU: 0 PID: 3188 at drivers/bus/omap_l3_noc.c:148 l3_interrupt_handler+0x258/0x374() 44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4_PER1_P3 (Idle): Data Access in User mode during Functional access Hence, add missed PM_RESTORE_PREPARE PM event in mmc_pm_notify(). Fixes: 4c2ef25f (mmc: fix all hangs related to mmc/sd card...) Signed-off-by:
Grygorii Strashko <Grygorii.Strashko@linaro.org> Signed-off-by:
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Ben Hutchings authored
commit 8014bcc8 upstream. The variable for the 'permissive' module parameter used to be static but was recently changed to be extern. This puts it in the kernel global namespace if the driver is built-in, so its name should begin with a prefix identifying the driver. Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Fixes: af6fc858 ("xen-pciback: limit guest control of command register") Signed-off-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
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Ulf Hansson authored
commit 11133db7 upstream. Fixes: c94a4ab7 ("ARM: ux500: Disable the MMCI gpio-regulator by default") Signed-off-by:
Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by:
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Ulf Hansson authored
commit f9a8c391 upstream. Fixes: c94a4ab7 ("ARM: ux500: Disable the MMCI gpio-regulator by default") Signed-off-by:
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Ulf Hansson authored
commit 53d26698 upstream. The GPIO regulator for the SD-card isn't a ux500 SOC configuration, but instead it's specific to the board. Move the definition of it, into the board DTSs. Fixes: c94a4ab7 ("ARM: ux500: Disable the MMCI gpio-regulator by default") Signed-off-by:
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Eric W. Biederman authored
commit 7e96c1b0 upstream. This fixes a dumb bug in fs_fully_visible that allows proc or sys to be mounted if there is a bind mount of part of /proc/ or /sys/ visible. Reported-by:
Eric Windisch <ewindisch@docker.com> Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Al Viro authored
commit f15133df upstream. path_openat() jumps to the wrong place after do_tmpfile() - it has already done path_cleanup() (as part of path_lookupat() called by do_tmpfile()), so doing that again can lead to double fput(). Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> [ luis: backported to 3.16: - adjusted context as 3.16 doesn't have path_cleanup() helper, introduced by 893b7775 ("fs/namei.c: new helper (path_cleanup())") ] Signed-off-by:
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Christian König authored
commit d52cdfa4 upstream. MPEG 2/4 are only supported since UVD3. Signed-off-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Christian König authored
commit a1b403da upstream. Invalid messages can crash the hw otherwise. Signed-off-by:
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Christian König authored
commit 29c63fe2 upstream. Invalid handles can crash the hw. Signed-off-by:
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Jani Nikula authored
commit 9fcb1704 upstream. The eDP port A register on PCH split platforms has a slightly different register layout from the other ports, with bit 6 being either alternate scrambler reset or reserved, depending on the generation. Our misinterpretation of the bit as audio has lead to warning. Fix this by not enabling audio on port A, since none of our platforms support audio on port A anyway. v2: DDI doesn't have audio on port A either (Sivakumar Thulasimani) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89958Reported-and-tested-by:
Chris Bainbridge <chris.bainbridge@gmail.com> Reviewed-by:
Sivakumar Thulasimani <sivakumar.thulasimani@intel.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by:
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Junxiao Bi authored
commit b1432a2a upstream. There is a race window in dlm_get_lock_resource(), which may return a lock resource which has been purged. This will cause the process to hang forever in dlmlock() as the ast msg can't be handled due to its lock resource not existing. dlm_get_lock_resource { ... spin_lock(&dlm->spinlock); tmpres = __dlm_lookup_lockres_full(dlm, lockid, namelen, hash); if (tmpres) { spin_unlock(&dlm->spinlock); >>>>>>>> race window, dlm_run_purge_list() may run and purge the lock resource spin_lock(&tmpres->spinlock); ... spin_unlock(&tmpres->spinlock); } } Signed-off-by:
Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Ryusuke Konishi authored
commit d8fd150f upstream. The range check for b-tree level parameter in nilfs_btree_root_broken() is wrong; it accepts the case of "level == NILFS_BTREE_LEVEL_MAX" even though the level is limited to values in the range of 0 to (NILFS_BTREE_LEVEL_MAX - 1). Since the level parameter is read from storage device and used to index nilfs_btree_path array whose element count is NILFS_BTREE_LEVEL_MAX, it can cause memory overrun during btree operations if the boundary value is set to the level parameter on device. This fixes the broken sanity check and adds a comment to clarify that the upper bound NILFS_BTREE_LEVEL_MAX is exclusive. Signed-off-by:
Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by:
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Naoya Horiguchi authored
commit 602498f9 upstream. If multiple soft offline events hit one free page/hugepage concurrently, soft_offline_page() can handle the free page/hugepage multiple times, which makes num_poisoned_pages counter increased more than once. This patch fixes this wrong counting by checking TestSetPageHWPoison for normal papes and by checking the return value of dequeue_hwpoisoned_huge_page() for hugepages. Signed-off-by:
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by:
Dean Nelson <dnelson@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by:
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Naoya Horiguchi authored
commit 09789e5d upstream. Currently memory_failure() calls shake_page() to sweep pages out from pcplists only when the victim page is 4kB LRU page or thp head page. But we should do this for a thp tail page too. Consider that a memory error hits a thp tail page whose head page is on a pcplist when memory_failure() runs. Then, the current kernel skips shake_pages() part, so hwpoison_user_mappings() returns without calling split_huge_page() nor try_to_unmap() because PageLRU of the thp head is still cleared due to the skip of shake_page(). As a result, me_huge_page() runs for the thp, which is broken behavior. One effect is a leak of the thp. And another is to fail to isolate the memory error, so later access to the error address causes another MCE, which kills the processes which used the thp. This patch fixes this problem by calling shake_page() for thp tail case. Fixes: 385de357 ("thp: allow a hwpoisoned head page to be put back to LRU") Signed-off-by:
Andi Kleen <ak@linux.intel.com> Acked-by:
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Boris Ostrovsky authored
commit 16e6bd59 upstream. .. because bind_evtchn_to_cpu(evtchn, cpu) will map evtchn to 'info' and pass 'info' down to xen_evtchn_port_bind_to_cpu(). Signed-off-by:
Boris Ostrovsky <boris.ostrovsky@oracle.com> Tested-by:
Annie Li <annie.li@oracle.com> Signed-off-by:
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Boris Ostrovsky authored
commit b9d934f2 upstream. After a resume the hypervisor/tools may change console event channel number. We should re-query it. Signed-off-by:
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Boris Ostrovsky authored
commit 16f1cf3b upstream. After a resume the hypervisor/tools may change xenbus event channel number. We should re-query it. Signed-off-by:
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Boris Ostrovsky authored
commit 5cec9883 upstream. When a guest is resumed, the hypervisor may change event channel assignments. If this happens and the guest uses 2-level events it is possible for the interrupt to be claimed by wrong VCPU since cpu_evtchn_mask bits may be stale. This can happen even though evtchn_2l_bind_to_cpu() attempts to clear old bits: irq_info that is passed in is not necessarily the original one (from pre-migration times) but instead is freshly allocated during resume and so any information about which CPU the channel was bound to is lost. Thus we should clear the mask during resume. We also need to make sure that bits for xenstore and console channels are set when these two subsystems are resumed. While rebind_evtchn_irq() (which is invoked for both of them on a resume) calls irq_set_affinity(), the latter will in fact postpone setting affinity until handling the interrupt. But because cpu_evtchn_mask will have bits for these two cleared we won't be able to take the interrupt. With that in mind, we need to bind those two channels explicitly in rebind_evtchn_irq(). We will keep irq_set_affinity() so that we have a pass through generic irq affinity code later, in case something needs to be updated there as well. (Also replace cpumask_of(0) with cpumask_of(info->cpu) in rebind_evtchn_irq(): it should be set to zero in preceding xen_irq_info_evtchn_setup().) Signed-off-by:
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