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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Martin Wilck <mwilck@suse.com>, Hannes Reinecke <hare@suse.de>,
	Sagi Grimberg <sagi@grimberg.me>, Christoph Hellwig <hch@lst.de>,
	Sasha Levin <sashal@kernel.org>,
	linux-nvme@lists.infradead.org
Subject: [PATCH AUTOSEL 5.8 69/72] nvme-multipath: fix logic for non-optimized paths
Date: Sat,  8 Aug 2020 19:35:38 -0400	[thread overview]
Message-ID: <20200808233542.3617339-69-sashal@kernel.org> (raw)
In-Reply-To: <20200808233542.3617339-1-sashal@kernel.org>

From: Martin Wilck <mwilck@suse.com>

[ Upstream commit 3f6e3246db0e6f92e784965d9d0edb8abe6c6b74 ]

Handle the special case where we have exactly one optimized path,
which we should keep using in this case.

Fixes: 75c10e732724 ("nvme-multipath: round-robin I/O policy")
Signed off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/nvme/host/multipath.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 66509472fe06a..fe8f7f123fac7 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -246,6 +246,12 @@ static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head,
 			fallback = ns;
 	}
 
+	/* No optimized path found, re-check the current path */
+	if (!nvme_path_is_disabled(old) &&
+	    old->ana_state == NVME_ANA_OPTIMIZED) {
+		found = old;
+		goto out;
+	}
 	if (!fallback)
 		return NULL;
 	found = fallback;
-- 
2.25.1


  parent reply	other threads:[~2020-08-08 23:48 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-08 23:34 [PATCH AUTOSEL 5.8 01/72] ARM: dts: stm32: fix uart nodes ordering in stm32mp15-pinctrl Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 02/72] ARM: dts: stm32: fix uart7_pins_a comments " Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 03/72] x86/mce/inject: Fix a wrong assignment of i_mce.status Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 04/72] perf/x86/intel/uncore: Fix oops when counting IMC uncore events on some TGL Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 05/72] x86, sched: check for counters overflow in frequency invariant accounting Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 06/72] x86, sched: Bail out of frequency invariance if turbo frequency is unknown Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 07/72] x86, sched: Bail out of frequency invariance if turbo_freq/base_freq gives 0 Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 08/72] sched/fair: Fix NOHZ next idle balance Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 09/72] sched: correct SD_flags returned by tl->sd_flags() Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 10/72] arm64: dts: rockchip: fix rk3368-lion gmac reset gpio Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 11/72] arm64: dts: rockchip: fix rk3399-puma vcc5v0-host gpio Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 12/72] arm64: dts: rockchip: fix rk3399-puma gmac reset gpio Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 13/72] EDAC: Fix reference count leaks Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 14/72] crc-t10dif: Fix potential crypto notify dead-lock Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 15/72] arm64: dts: qcom: msm8916: Replace invalid bias-pull-none property Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 16/72] memory: tegra: Fix an error handling path in tegra186_emc_probe() Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 17/72] blktrace: fix debugfs use after free Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 18/72] soc: qcom: rpmh-rsc: Don't use ktime for timeout in write_tcs_reg_sync() Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 19/72] crypto: ccree - fix resource leak on error path Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 20/72] ARM: exynos: MCPM: Restore big.LITTLE cpuidle support Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 21/72] rcu/tree: Repeat the monitor if any free channel is busy Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 22/72] firmware: arm_scmi: Fix SCMI genpd domain probing Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 23/72] arm64: dts: sun50i-pinephone: dldo4 must not be >= 1.8V Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 24/72] arm64: dts: exynos: Fix silent hang after boot on Espresso Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 25/72] sched/uclamp: Fix initialization of struct uclamp_rq Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 26/72] crypto: qat - allow xts requests not multiple of block Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 27/72] clk: scmi: Fix min and max rate when registering clocks with discrete rates Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 28/72] m68k: mac: Don't send IOP message until channel is idle Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 29/72] m68k: mac: Fix IOP status/control register writes Sasha Levin
2020-08-08 23:34 ` [PATCH AUTOSEL 5.8 30/72] platform/x86: intel-hid: Fix return value check in check_acpi_dev() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 31/72] platform/x86: intel-vbtn: " Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 32/72] ARM: dts: gose: Fix ports node name for adv7180 Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 33/72] arm64: dts: renesas: Fix SD Card/eMMC interface device node names Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 34/72] ARM: dts: gose: Fix ports node name for adv7612 Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 35/72] ARM: at91: pm: add missing put_device() call in at91_pm_sram_init() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 36/72] ARM: dts: exynos: Disable frequency scaling for FSYS bus on Odroid XU3 family Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 37/72] reset: intel: fix a compile warning about REG_OFFSET redefined Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 38/72] ARM: dts: at91: sama5d3_xplained: change phy-mode Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 39/72] ARM: dts: sunxi: bananapi-m2-plus-v1.2: Add regulator supply to all CPU cores Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 40/72] ARM: dts: sunxi: bananapi-m2-plus-v1.2: Fix CPU supply voltages Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 41/72] ARM: dts: stm32: Fix spi4 pins in stm32mp15-pinctrl Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 42/72] spi: dw-dma: Fix Tx DMA channel working too fast Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 43/72] spi: lantiq: fix: Rx overflow error in full duplex mode Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 44/72] crypto: x86/crc32c - fix building with clang ias Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 45/72] tpm: Require that all digests are present in TCG_PCR_EVENT2 structures Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 46/72] recordmcount: only record relocation of type R_AARCH64_CALL26 on arm64 Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 47/72] regulator: fix memory leak on error path of regulator_register() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 48/72] io_uring: fix sq array offset calculation Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 49/72] arm64: dts: meson: misc fixups for w400 dtsi Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 50/72] arm64: dts: meson: fix mmc0 tuning error on Khadas VIM3 Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 51/72] soc: qcom: pdr: Reorder the PD state indication ack Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 52/72] spi: rockchip: Fix error in SPI slave pio read Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 53/72] ARM: socfpga: PM: add missing put_device() call in socfpga_setup_ocram_self_refresh() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 54/72] iocost: Fix check condition of iocg abs_vdebt Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 55/72] scripts/selinux/mdp: fix initial SID handling Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 56/72] irqchip/ti-sci-inta: Fix return value about devm_ioremap_resource() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 57/72] seccomp: Fix ioctl number for SECCOMP_IOCTL_NOTIF_ID_VALID Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 58/72] md: raid0/linear: fix dereference before null check on pointer mddev Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 59/72] irqchip/loongson-htvec: Fix potential resource leak Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 60/72] irqchip/loongson-htvec: Check return value of irq_domain_translate_onecell() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 61/72] irqchip/loongson-pch-pic: Check return value of irq_domain_translate_twocell() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 62/72] irqchip/loongson-liointc: Fix potential dead lock Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 63/72] kunit: tool: fix broken default args in unit tests Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 64/72] kunit: tool: fix improper treatment of file location Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 65/72] irqchip/irq-bcm7038-l1: Guard uses of cpu_logical_map Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 66/72] irqchip/gic-v4.1: Use GFP_ATOMIC flag in allocate_vpe_l1_table() Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 67/72] nvme-tcp: fix controller reset hang during traffic Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 68/72] nvme-rdma: " Sasha Levin
2020-08-08 23:35 ` Sasha Levin [this message]
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 70/72] nvme-multipath: do not fall back to __nvme_find_path() for non-optimized paths Sasha Levin
2020-08-10 15:37   ` Martin Wilck
2020-08-16 13:50     ` Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 71/72] irqchip/loongson-pch-pic: Fix the misused irq flow handler Sasha Levin
2020-08-08 23:35 ` [PATCH AUTOSEL 5.8 72/72] block: don't do revalidate zones on invalid devices Sasha Levin

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