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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Manjong Lee <mj0123.lee@samsung.com>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Changheun Lee <nanich.lee@samsung.com>,
	Jens Axboe <axboe@kernel.dk>,
	Christoph Hellwig <hch@infradead.org>,
	Matthew Wilcox <willy@infradead.org>,
	seunghwan.hyun@samsung.com, sookwan7.kim@samsung.com,
	yt0928.kim@samsung.com, junho89.kim@samsung.com,
	jisoo2146.oh@samsung.com,
	Andrew Morton <akpm@linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH 5.4 27/88] mm: bdi: initialize bdi_min_ratio when bdi is unregistered
Date: Mon, 13 Dec 2021 10:29:57 +0100	[thread overview]
Message-ID: <20211213092934.158966653@linuxfoundation.org> (raw)
In-Reply-To: <20211213092933.250314515@linuxfoundation.org>

From: Manjong Lee <mj0123.lee@samsung.com>

commit 3c376dfafbf7a8ea0dea212d095ddd83e93280bb upstream.

Initialize min_ratio if it is set during bdi unregistration.  This can
prevent problems that may occur a when bdi is removed without resetting
min_ratio.

For example.
1) insert external sdcard
2) set external sdcard's min_ratio 70
3) remove external sdcard without setting min_ratio 0
4) insert external sdcard
5) set external sdcard's min_ratio 70 << error occur(can't set)

Because when an sdcard is removed, the present bdi_min_ratio value will
remain.  Currently, the only way to reset bdi_min_ratio is to reboot.

[akpm@linux-foundation.org: tweak comment and coding style]

Link: https://lkml.kernel.org/r/20211021161942.5983-1-mj0123.lee@samsung.com
Signed-off-by: Manjong Lee <mj0123.lee@samsung.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Changheun Lee <nanich.lee@samsung.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <seunghwan.hyun@samsung.com>
Cc: <sookwan7.kim@samsung.com>
Cc: <yt0928.kim@samsung.com>
Cc: <junho89.kim@samsung.com>
Cc: <jisoo2146.oh@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 mm/backing-dev.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -1013,6 +1013,13 @@ void bdi_unregister(struct backing_dev_i
 	wb_shutdown(&bdi->wb);
 	cgwb_bdi_unregister(bdi);
 
+	/*
+	 * If this BDI's min ratio has been set, use bdi_set_min_ratio() to
+	 * update the global bdi_min_ratio.
+	 */
+	if (bdi->min_ratio)
+		bdi_set_min_ratio(bdi, 0);
+
 	if (bdi->dev) {
 		bdi_debug_unregister(bdi);
 		device_unregister(bdi->dev);



  parent reply	other threads:[~2021-12-13  9:48 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-13  9:29 [PATCH 5.4 00/88] 5.4.165-rc1 review Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 01/88] serial: tegra: Change lower tolerance baud rate limit for tegra20 and tegra30 Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 02/88] ntfs: fix ntfs_test_inode and ntfs_init_locked_inode function type Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 03/88] HID: quirks: Add quirk for the Microsoft Surface 3 type-cover Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 04/88] HID: google: add eel USB id Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 05/88] HID: add hid_is_usb() function to make it simpler for USB detection Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 06/88] HID: add USB_HID dependancy to hid-prodikeys Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 07/88] HID: add USB_HID dependancy to hid-chicony Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 08/88] HID: add USB_HID dependancy on some USB HID drivers Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 09/88] HID: bigbenff: prevent null pointer dereference Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 10/88] HID: wacom: fix problems when device is not a valid USB device Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 11/88] HID: check for valid USB device for many HID drivers Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 12/88] can: kvaser_usb: get CAN clock frequency from device Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 13/88] can: kvaser_pciefd: kvaser_pciefd_rx_error_frame(): increase correct stats->{rx,tx}_errors counter Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 14/88] can: sja1000: fix use after free in ems_pcmcia_add_card() Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 15/88] nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 16/88] selftests: netfilter: add a vrf+conntrack testcase Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 17/88] vrf: dont run conntrack on vrf with !dflt qdisc Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 18/88] bpf: Fix the off-by-two error in range markings Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 19/88] ice: ignore dropped packets during init Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 20/88] bonding: make tx_rebalance_counter an atomic Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 21/88] nfp: Fix memory leak in nfp_cpp_area_cache_add() Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 22/88] seg6: fix the iif in the IPv6 socket control block Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 23/88] udp: using datalen to cap max gso segments Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 24/88] iavf: restore MSI state on reset Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 25/88] iavf: Fix reporting when setting descriptor count Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 26/88] IB/hfi1: Correct guard on eager buffer deallocation Greg Kroah-Hartman
2021-12-13  9:29 ` Greg Kroah-Hartman [this message]
2021-12-13  9:29 ` [PATCH 5.4 28/88] ALSA: ctl: Fix copy of updated id with element read/write Greg Kroah-Hartman
2021-12-13  9:29 ` [PATCH 5.4 29/88] ALSA: hda/realtek - Add headset Mic support for Lenovo ALC897 platform Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 30/88] ALSA: pcm: oss: Fix negative period/buffer sizes Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 31/88] ALSA: pcm: oss: Limit the period size to 16MB Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 32/88] ALSA: pcm: oss: Handle missing errors in snd_pcm_oss_change_params*() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 33/88] btrfs: clear extent buffer uptodate when we fail to write it Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 34/88] btrfs: replace the BUG_ON in btrfs_del_root_ref with proper error handling Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 35/88] nfsd: Fix nsfd startup race (again) Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 36/88] tracefs: Have new files inherit the ownership of their parent Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 37/88] clk: qcom: regmap-mux: fix parent clock lookup Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 38/88] drm/syncobj: Deal with signalled fences in drm_syncobj_find_fence Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 39/88] can: pch_can: pch_can_rx_normal: fix use after free Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 40/88] can: m_can: Disable and ignore ELO interrupt Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 41/88] x86/sme: Explicitly map new EFI memmap table as encrypted Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 42/88] libata: add horkage for ASMedia 1092 Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 43/88] wait: add wake_up_pollfree() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 44/88] binder: use wake_up_pollfree() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 45/88] signalfd: " Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 46/88] aio: keep poll requests on waitqueue until completed Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 47/88] aio: fix use-after-free due to missing POLLFREE handling Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 48/88] tracefs: Set all files to the same group ownership as the mount option Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 49/88] block: fix ioprio_get(IOPRIO_WHO_PGRP) vs setuid(2) Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 50/88] qede: validate non LSO skb length Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 51/88] ASoC: qdsp6: q6routing: Fix return value from msm_routing_put_audio_mixer Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 52/88] i40e: Fix failed opcode appearing if handling messages from VF Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 53/88] i40e: Fix pre-set max number of queues for VF Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 54/88] mtd: rawnand: fsmc: Take instruction delay into account Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 55/88] mtd: rawnand: fsmc: Fix timing computation Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 56/88] dt-bindings: net: Reintroduce PHY no lane swap binding Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 57/88] tools build: Remove needless libpython-version feature check that breaks test-all fast path Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 58/88] net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 59/88] net: altera: set a couple error code in probe() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 60/88] net: fec: only clear interrupt of handling queue in fec_enet_rx_queue() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 61/88] net, neigh: clear whole pneigh_entry at alloc time Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 62/88] net/qla3xxx: fix an error code in ql_adapter_up() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 63/88] selftests/fib_tests: Rework fib_rp_filter_test() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 64/88] USB: gadget: detect too-big endpoint 0 requests Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 65/88] USB: gadget: zero allocate endpoint 0 buffers Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 66/88] usb: core: config: fix validation of wMaxPacketValue entries Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 67/88] xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime suspending Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 68/88] usb: core: config: using bit mask instead of individual bits Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 69/88] xhci: avoid race between disable slot command and host runtime suspend Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 70/88] iio: trigger: Fix reference counting Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 71/88] iio: trigger: stm32-timer: fix MODULE_ALIAS Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 72/88] iio: stk3310: Dont return error code in interrupt handler Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 73/88] iio: mma8452: Fix trigger reference couting Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 74/88] iio: ltr501: Dont return error code in trigger handler Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 75/88] iio: kxsd9: " Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 76/88] iio: itg3200: Call iio_trigger_notify_done() on error Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 77/88] iio: dln2-adc: Fix lockdep complaint Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 78/88] iio: dln2: Check return value of devm_iio_trigger_register() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 79/88] iio: at91-sama5d2: Fix incorrect sign extension Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 80/88] iio: adc: axp20x_adc: fix charging current reporting on AXP22x Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 81/88] iio: ad7768-1: Call iio_trigger_notify_done() on error Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 82/88] iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 83/88] irqchip/armada-370-xp: Fix return value of armada_370_xp_msi_alloc() Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 84/88] irqchip/armada-370-xp: Fix support for Multi-MSI interrupts Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 85/88] irqchip/irq-gic-v3-its.c: Force synchronisation when issuing INVALL Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 86/88] irqchip: nvic: Fix offset for Interrupt Priority Offsets Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 87/88] misc: fastrpc: fix improper packet size calculation Greg Kroah-Hartman
2021-12-13  9:30 ` [PATCH 5.4 88/88] bpf: Add selftests to cover packet access corner cases Greg Kroah-Hartman
2021-12-13 19:55 ` [PATCH 5.4 00/88] 5.4.165-rc1 review Guenter Roeck
2021-12-13 20:24 ` Florian Fainelli
2021-12-13 20:28 ` Shuah Khan
2021-12-14 12:29 ` Naresh Kamboju
2021-12-14 12:41 ` Sudip Mukherjee
2021-12-15  0:50 ` Samuel Zou

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