- 05 Dec, 2019 40 commits
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Anthony Yznaga authored
[ Upstream commit b6fb87b8 ] Because kpagecount_read() fakes success if map counts are not being collected, clamp the page count passed to it by walk_pfn() to the pages value returned by the preceding call to kpageflags_read(). Link: http://lkml.kernel.org/r/1543962269-26116-1-git-send-email-anthony.yznaga@oracle.com Fixes: 7f1d23e6 ("tools/vm/page-types.c: include shared map counts") Signed-off-by:
Anthony Yznaga <anthony.yznaga@oracle.com> Reviewed-by:
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Matthew Wilcox <willy@infradead.org> Cc: David Rientjes <rientjes@google.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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Wentao Wang authored
[ Upstream commit d31cfe7b ] Link: http://lkml.kernel.org/r/C8ECE1B7A767434691FEEFA3A01765D72AFB8E78@MX203CL03.corp.emc.comSigned-off-by:
Wentao Wang <witallwang@gmail.com> Reviewed-by:
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Aaron Lu authored
[ Upstream commit 742aa7fb ] There are multiple places of freeing a page, they all do the same things so a common function can be used to reduce code duplicate. It also avoids bug fixed in one function but left in another. Link: http://lkml.kernel.org/r/20181119134834.17765-3-aaron.lu@intel.comSigned-off-by:
Aaron Lu <aaron.lu@intel.com> Acked-by:
Vlastimil Babka <vbabka@suse.cz> Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Pankaj gupta <pagupta@redhat.com> Cc: Pawel Staszewski <pstaszewski@itcare.pl> Cc: Tariq Toukan <tariqt@mellanox.com> Signed-off-by:
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Aaron Lu authored
[ Upstream commit 65895b67 ] page_frag_free() calls __free_pages_ok() to free the page back to Buddy. This is OK for high order page, but for order-0 pages, it misses the optimization opportunity of using Per-Cpu-Pages and can cause zone lock contention when called frequently. Pawel Staszewski recently shared his result of 'how Linux kernel handles normal traffic'[1] and from perf data, Jesper Dangaard Brouer found the lock contention comes from page allocator: mlx5e_poll_tx_cq | --16.34%--napi_consume_skb | |--12.65%--__free_pages_ok | | | --11.86%--free_one_page | | | |--10.10%--queued_spin_lock_slowpath | | | --0.65%--_raw_spin_lock | |--1.55%--page_frag_free | --1.44%--skb_release_data Jesper explained how it happened: mlx5 driver RX-page recycle mechanism is not effective in this workload and pages have to go through the page allocator. The lock contention happens during mlx5 DMA TX completion cycle. And the page allocator cannot keep up at these speeds.[2] I thought that __free_pages_ok() are mostly freeing high order pages and thought this is an lock contention for high order pages but Jesper explained in detail that __free_pages_ok() here are actually freeing order-0 pages because mlx5 is using order-0 pages to satisfy its page pool allocation request.[3] The free path as pointed out by Jesper is: skb_free_head() -> skb_free_frag() -> page_frag_free() And the pages being freed on this path are order-0 pages. Fix this by doing similar things as in __page_frag_cache_drain() - send the being freed page to PCP if it's an order-0 page, or directly to Buddy if it is a high order page. With this change, Paweł hasn't noticed lock contention yet in his workload and Jesper has noticed a 7% performance improvement using a micro benchmark and lock contention is gone. Ilias' test on a 'low' speed 1Gbit interface on an cortex-a53 shows ~11% performance boost testing with 64byte packets and __free_pages_ok() disappeared from perf top. [1]: https://www.spinics.net/lists/netdev/msg531362.html [2]: https://www.spinics.net/lists/netdev/msg531421.html [3]: https://www.spinics.net/lists/netdev/msg531556.html [akpm@linux-foundation.org: add comment] Link: http://lkml.kernel.org/r/20181120014544.GB10657@intel.comSigned-off-by:
Pawel Staszewski <pstaszewski@itcare.pl> Analysed-by:
Jesper Dangaard Brouer <brouer@redhat.com> Acked-by:
Mel Gorman <mgorman@techsingularity.net> Acked-by:
Ilias Apalodimas <ilias.apalodimas@linaro.org> Tested-by:
Alexander Duyck <alexander.h.duyck@linux.intel.com> Acked-by:
Tariq Toukan <tariqt@mellanox.com> Acked-by:
Pankaj gupta <pagupta@redhat.com> Signed-off-by:
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Wei Yang authored
[ Upstream commit 8b09549c ] Commit fa5e084e ("vmscan: do not unconditionally treat zones that fail zone_reclaim() as full") changed the return value of node_reclaim(). The original return value 0 means NODE_RECLAIM_SOME after this commit. While the return value of node_reclaim() when CONFIG_NUMA is n is not changed. This will leads to call zone_watermark_ok() again. This patch fixes the return value by adjusting to NODE_RECLAIM_NOSCAN. Since node_reclaim() is only called in page_alloc.c, move it to mm/internal.h. Link: http://lkml.kernel.org/r/20181113080436.22078-1-richard.weiyang@gmail.comSigned-off-by:
Wei Yang <richard.weiyang@gmail.com> Acked-by:
Michal Hocko <mhocko@suse.com> Reviewed-by:
Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by:
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Junxiao Bi authored
[ Upstream commit d85400af ] Dirty flag of the journal should be cleared at the last stage of umount, if do it before jbd2_journal_destroy(), then some metadata in uncommitted transaction could be lost due to io error, but as dirty flag of journal was already cleared, we can't find that until run a full fsck. This may cause system panic or other corruption. Link: http://lkml.kernel.org/r/20181121020023.3034-3-junxiao.bi@oracle.comSigned-off-by:
Junxiao Bi <junxiao.bi@oracle.com> Reviewed-by:
Yiwen Jiang <jiangyiwen@huawei.com> Reviewed-by:
Joseph Qi <jiangqi903@gmail.com> Cc: Jun Piao <piaojun@huawei.com> Cc: Changwei Ge <ge.changwei@h3c.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Mark Fasheh <mfasheh@versity.com> Signed-off-by:
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Wen Yang authored
[ Upstream commit 40752b3e ] This patch fixes potential double frees if register_hdlc_device() fails. Signed-off-by:
Wen Yang <wen.yang99@zte.com.cn> Reviewed-by:
Peng Hao <peng.hao2@zte.com.cn> CC: Zhao Qiang <qiang.zhao@nxp.com> CC: "David S. Miller" <davem@davemloft.net> CC: netdev@vger.kernel.org CC: linuxppc-dev@lists.ozlabs.org CC: linux-kernel@vger.kernel.org Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Kangjie Lu authored
[ Upstream commit 92ee77d1 ] When acpi_match_device fails, its return value is NULL. Directly using the return value without a check may result in a NULL-pointer dereference. The fix checks if acpi_match_device fails, and if so, returns -EINVAL. Signed-off-by:
Kangjie Lu <kjlu@umn.edu> Signed-off-by:
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Kangjie Lu authored
[ Upstream commit 46273cf7 ] genlmsg_put could fail. The fix inserts a check of its return value, and if it fails, returns -EMSGSIZE. Signed-off-by:
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Kangjie Lu authored
[ Upstream commit ff07d48d ] atl1e_write_phy_reg() could fail. The fix issues an error message when it fails. Signed-off-by:
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Kangjie Lu authored
[ Upstream commit e49505f7 ] Both bcm_sf2_sw_indir_rw and mdiobus_write_nested could fail, so let's return their error codes upstream. Signed-off-by:
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Kangjie Lu authored
[ Upstream commit f86a3b83 ] clk_prepare() could fail, so let's check its status, and if it fails, return its error code upstream. Signed-off-by:
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Kangjie Lu authored
[ Upstream commit 2d822f2d ] clk_prepare() could fail, so let's check its status, and if it fails, return its error code upstream. Signed-off-by:
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Richard Weinberger authored
[ Upstream commit 550ed0e2 ] Both do more or less the same thing and are mutually exclusive. If both are enabled the build will fail. Sooner or later we can kill UML's GCOV. Signed-off-by:
Richard Weinberger <richard@nod.at> Signed-off-by:
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Richard Weinberger authored
[ Upstream commit 0053102a ] sys/uio.h gives us writev(), otherwise the build might fail on some systems. Fixes: 49da7e64 ("High Performance UML Vector Network Driver") Signed-off-by:
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Chao Yu authored
[ Upstream commit b32e0190 ] If user change inode's i_flags via ioctl, let's add it into global dirty list, so that checkpoint can guarantee its persistence before fsync, it can make checkpoint keeping strong consistency. Signed-off-by:
Chao Yu <yuchao0@huawei.com> Signed-off-by:
Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by:
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Qiuyang Sun authored
[ Upstream commit 9249dded ] Should use lstart (logical start address) instead of start (in dev) here. This fixes a bug in multi-device scenarios. Signed-off-by:
Qiuyang Sun <sunqiuyang@huawei.com> Reviewed-by:
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Aditya Pakki authored
[ Upstream commit 0eb987c8 ] In net_ns_init(), register_pernet_subsys() could fail while registering network namespace subsystems. The fix checks the return value and sends a panic() on failure. Signed-off-by:
Aditya Pakki <pakki001@umn.edu> Reviewed-by:
Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by:
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Aditya Pakki authored
[ Upstream commit 89dfd008 ] In tipc_nl_compat_sk_dump(), if nla_parse_nested() fails, it could return an error. To be consistent with other invocations of the function call, on error, the fix passes the return value upstream. Signed-off-by:
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Alexander Shiyan authored
[ Upstream commit b0f17570 ] Commit e39c0df1 ("pwm: Introduce the pwm_args concept") has changed the variable for the period for clps711x-pwm driver, so now pwm_get/set_period() works with pwm->state.period variable instead of pwm->args.period. This patch changes the period variable in other places where it is used. Signed-off-by:
Alexander Shiyan <shc_work@mail.ru> Signed-off-by:
Thierry Reding <thierry.reding@gmail.com> Signed-off-by:
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Fabio Estevam authored
[ Upstream commit 2326828e ] The following build warnings are seen when building for ARM64 allmodconfig: drivers/crypto/mxc-scc.c:181:20: warning: format '%d' expects argument of type 'int', but argument 5 has type 'size_t' {aka 'long unsigned int'} [-Wformat=] drivers/crypto/mxc-scc.c:186:21: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' {aka 'long unsigned int'} [-Wformat=] drivers/crypto/mxc-scc.c:277:21: warning: format '%d' expects argument of type 'int', but argument 4 has type 'size_t' {aka 'long unsigned int'} [-Wformat=] drivers/crypto/mxc-scc.c:339:3: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] drivers/crypto/mxc-scc.c:340:3: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] Fix them by using the %zu specifier to print a size_t variable and using a plain %x to print the result of a readl(). Signed-off-by:
Fabio Estevam <festevam@gmail.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
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Benjamin Herrenschmidt authored
[ Upstream commit 505a314f ] HMIs will crash the kernel due to BRANCH_LINK_TO_FAR(hmi_exception_realmode) Calling into the OPD instead of the actual code. Fixes: 2337d207 ("powerpc/64: CONFIG_RELOCATABLE support for hmi interrupts") Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> [mpe: Use DOTSYM() rather than #ifdef] Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Signed-off-by:
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Michael Ellerman authored
[ Upstream commit 47918bc6 ] In update_lmb_associativity_index() we lookup dr_node using of_find_node_by_path() which takes a reference for us. In the non-error case we forget to drop the reference. Note that find_aa_index() does modify properties of the node, but doesn't need an extra reference held once it's returned. Signed-off-by:
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Christophe Leroy authored
[ Upstream commit 0deae39c ] When the watchdog timer is set in interrupt mode, it causes a machine check when it times out. The purpose of this mode is to ease debugging, not to crash the kernel and reboot the machine. This patch implements a special handling for that, in order to not crash the kernel if the watchdog times out while in interrupt or within the idle task. Signed-off-by:
Christophe Leroy <christophe.leroy@c-s.fr> [scottwood: added missing #include] Signed-off-by:
Scott Wood <oss@buserror.net> Signed-off-by:
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Kangjie Lu authored
[ Upstream commit cd07e370 ] tps65910_reg_set_bits() may fail. The fix checks if it fails, and if so, returns with its error code. Signed-off-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
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Jesper Dangaard Brouer authored
[ Upstream commit 77ea5f4c ] The frame_size passed to build_skb must be aligned, else it is possible that the embedded struct skb_shared_info gets unaligned. For correctness make sure that xdpf->headroom in included in the alignment. No upstream drivers can hit this, as all XDP drivers provide an aligned headroom. This was discovered when playing with implementing XDP support for mvneta, which have a 2 bytes DSA header, and this Marvell ARM64 platform didn't like doing atomic operations on an unaligned skb_shinfo(skb)->dataref addresses. Fixes: 1c601d82 ("bpf: cpumap xdp_buff to skb conversion and allocation") Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
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Parav Pandit authored
[ Upstream commit d5108e69 ] Current rxe device counters are not thread safe. When multiple QPs are used, they can be racy. Make them thread safe by making it atomic64. Fixes: 0b1e5b99 ("IB/rxe: Add port protocol stats") Signed-off-by:
Parav Pandit <parav@mellanox.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com> Signed-off-by:
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Luc Van Oostenryck authored
[ Upstream commit 2c38f035 ] print_st_err() is defined with its 4th argument taking an 'enum drbd_state_rv' but its prototype use an int for it. Fix this by using 'enum drbd_state_rv' in the prototype too. Signed-off-by:
Luc Van Oostenryck <luc.vanoostenryck@gmail.com> Signed-off-by:
Roland Kammerer <roland.kammerer@linbit.com> Signed-off-by:
Lars Ellenberg <lars.ellenberg@linbit.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Lars Ellenberg authored
[ Upstream commit f708bd08 ] "suspending" IO is overloaded. It can mean "do not allow new requests" (obviously), but it also may mean "must not complete pending IO", for example while the fencing handlers do their arbitration. When adjusting disk options, we suspend io (disallow new requests), then wait for the activity-log to become unused (drain all IO completions), and possibly replace it with a new activity log of different size. If the other "suspend IO" aspect is active, pending IO completions won't happen, and we would block forever (unkillable drbdsetup process). Fix this by skipping the activity log adjustment if the "al-extents" setting did not change. Also, in case it did change, fail early without blocking if it looks like we would block forever. Signed-off-by:
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Lars Ellenberg authored
[ Upstream commit fe43ed97 ] Multiple failure scenario: a) all good Connected Primary/Secondary UpToDate/UpToDate b) lose disk on Primary, Connected Primary/Secondary Diskless/UpToDate c) continue to write to the device, changes only make it to the Secondary storage. d) lose disk on Secondary, Connected Primary/Secondary Diskless/Diskless e) now try to re-attach on Primary This would have succeeded before, even though that is clearly the wrong data set to attach to (missing the modifications from c). Because we only compared our "effective" and the "to-be-attached" data generation uuid tags if (device->state.conn < C_CONNECTED). Fix: change that constraint to (device->state.pdsk != D_UP_TO_DATE) compare the uuids, and reject the attach. This patch also tries to improve the reverse scenario: first lose Secondary, then Primary disk, then try to attach the disk on Secondary. Before this patch, the attach on the Secondary succeeds, but since commit drbd: disconnect, if the wrong UUIDs are attached on a connected peer the Primary will notice unsuitable data, and drop the connection hard. Though unfortunately at a point in time during the handshake where we cannot easily abort the attach on the peer without more refactoring of the handshake. We now reject any attach to "unsuitable" uuids, as long as we can see a Primary role, unless we already have access to "good" data. Signed-off-by:
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Lars Ellenberg authored
[ Upstream commit 94c43a13 ] During handshake, if we are diskless ourselves, we used to accept any size presented by the peer. Which could be zero if that peer was just brought up and connected to us without having a disk attached first, in which case both peers would just "flip" their volume sizes. Now, even a diskless node will ignore "zero" sizes presented by a diskless peer. Also a currently Diskless Primary will refuse to shrink during handshake: it may be frozen, and waiting for a "suitable" local disk or peer to re-appear (on-no-data-accessible suspend-io). If the peer is smaller than what we used to be, it is not suitable. The logic for a diskless node during handshake is now supposed to be: believe the peer, if - I don't have a current size myself - we agree on the size anyways - I do have a current size, am Secondary, and he has the only disk - I do have a current size, am Primary, and he has the only disk, which is larger than my current size Signed-off-by:
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Alexey Kardashevskiy authored
[ Upstream commit c2057701 ] The current implementation of the OPAL_PCI_EEH_FREEZE_STATUS call in skiboot's NPU driver does not touch the pci_error_type parameter so it might have garbage but the powernv code analyzes it nevertheless. This initializes pcierr and fstate to zero in all call sites. Signed-off-by:
Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by:
Sam Bobroff <sbobroff@linux.ibm.com> Signed-off-by:
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Alexey Kardashevskiy authored
[ Upstream commit 517ad4ae ] As a part of cleanup, the SPAPR TCE IOMMU subdriver releases preregistered memory. If there is a bug in memory release, the loop in tce_iommu_release() becomes infinite; this actually happened to me. This makes the loop finite and prints a warning on every failure to make the code more bug prone. Signed-off-by:
David Gibson <david@gibson.dropbear.id.au> Acked-by:
Alex Williamson <alex.williamson@redhat.com> Signed-off-by:
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Benjamin Herrenschmidt authored
[ Upstream commit 3cfb9ebe ] The bamboo dts has a bug: it uses a non-naturally aligned range for PCI memory space. This isnt' supported by the code, thus causing PCI to break on this system. This is due to the fact that while the chip memory map has 1G reserved for PCI memory, it's only 512M aligned. The code doesn't know how to split that into 2 different PMMs and fails, so limit the region to 512M. Signed-off-by:
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Christophe Leroy authored
[ Upstream commit 49a502ea ] As several other arches including x86, this patch makes it explicit that a bad page fault is a NULL pointer dereference when the fault address is lower than PAGE_SIZE In the mean time, this page makes all bad_page_fault() messages shorter so that they remain on one single line. And it prefixes them by "BUG: " so that they get easily grepped. Signed-off-by:
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Christophe Leroy authored
[ Upstream commit b18f0ae9 ] This patch fixes early DEBUG messages in prom.c: - Use %px instead of %p to see the addresses - Cast memblock_phys_mem_size() with (unsigned long long) to avoid build failure when phys_addr_t is not 64 bits. Signed-off-by:
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Joel Stanley authored
[ Upstream commit 72e7bcc2 ] When building for ppc32 with clang these flags are unsupported: -ffixed-r2 and -mmultiple llvm's lib/Target/PowerPC/PPCRegisterInfo.cpp marks r2 as reserved on when building for SVR4ABI and !ppc64: // The SVR4 ABI reserves r2 and r13 if (Subtarget.isSVR4ABI()) { // We only reserve r2 if we need to use the TOC pointer. If we have no // explicit uses of the TOC pointer (meaning we're a leaf function with // no constant-pool loads, etc.) and we have no potential uses inside an // inline asm block, then we can treat r2 has an ordinary callee-saved // register. const PPCFunctionInfo *FuncInfo = MF.getInfo<PPCFunctionInfo>(); if (!TM.isPPC64() || FuncInfo->usesTOCBasePtr() || MF.hasInlineAsm()) markSuperRegs(Reserved, PPC::R2); // System-reserved register markSuperRegs(Reserved, PPC::R13); // Small Data Area pointer register } This means we can safely omit -ffixed-r2 when building for 32-bit targets. The -mmultiple/-mno-multiple flags are not supported by clang, so platforms that might support multiple miss out on using multiple word instructions. We wrap these flags in cc-option so that when Clang gains support the kernel will be able use these flags. Clang 8 can then build a ppc44x_defconfig which boots in Qemu: make CC=clang-8 ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu- ppc44x_defconfig ./scripts/config -e CONFIG_DEVTMPFS -d DEVTMPFS_MOUNT make CC=clang-8 ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu- qemu-system-ppc -M bamboo \ -kernel arch/powerpc/boot/zImage \ -dtb arch/powerpc/boot/dts/bamboo.dtb \ -initrd ~/ppc32-440-rootfs.cpio \ -nographic -serial stdio -monitor pty -append "console=ttyS0" Link: https://github.com/ClangBuiltLinux/linux/issues/261 Link: https://bugs.llvm.org/show_bug.cgi?id=39556 Link: https://bugs.llvm.org/show_bug.cgi?id=39555Signed-off-by:
Joel Stanley <joel@jms.id.au> Reviewed-by:
Nick Desaulniers <ndesaulniers@google.com> Signed-off-by:
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Madhavan Srinivasan authored
[ Upstream commit 2d46d487 ] Raw event code has couple of fields "unit" and "cache" in it, to capture the "unit" to monitor for a given pmcxsel and cache reload qualifier to program in MMCR1. isa207_get_constraint() refers "unit" field to update the MMCRC (L2/L3) Event bus control fields with "cache" bits of the raw event code. These are power8 specific and not supported by PowerISA v3.0 pmu. So wrap the checks to be power8 specific. Also, "cache" bit field is referred to update MMCR1[16:17] and this check can be power8 specific. Fixes: 7ffd948f ('powerpc/perf: factor out power8 pmu functions') Signed-off-by:
Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by:
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Kyle Roeschley authored
[ Upstream commit 5803c128 ] When ath6kl was reworked to share code between regular and scheduled scans in commit 3b8ffc6a ("ath6kl: Configure probed SSID list consistently"), probed SSID entry changed from 1-index to 0-indexed. However, ath6kl_cfg80211_scan_complete_event() was missed in that change. Fix its indexing so that we correctly clear out the probed SSID list. Signed-off-by:
Kyle Roeschley <kyle.roeschley@ni.com> Signed-off-by:
Kalle Valo <kvalo@codeaurora.org> Signed-off-by:
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Kyle Roeschley authored
[ Upstream commit fb376a49 ] Commit dd45b759 ("ath6kl: Include match ssid list in scheduled scan") merged the probed and matched SSID lists before sending them to the firmware. In the process, it assumed match set support is always available in ath6kl_set_probed_ssids, which breaks scans for hidden SSIDs. Now, check that the firmware supports matching SSIDs in scheduled scans before setting MATCH_SSID_FLAG. Fixes: dd45b759 ("ath6kl: Include match ssid list in scheduled scan") Signed-off-by:
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