From: Stephen Hemminger <shemminger@vyatta.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
linux-kernel@vger.kernel.org
Subject: Re: floppy driver assumes INITIAL_JIFFIES == 0
Date: Thu, 3 Jun 2010 12:03:13 -0700 [thread overview]
Message-ID: <20100603120313.10a73b20@nehalam> (raw)
In-Reply-To: <alpine.LFD.2.00.1006031013060.8175@i5.linux-foundation.org>
On Thu, 3 Jun 2010 10:28:17 -0700 (PDT)
Linus Torvalds <torvalds@linux-foundation.org> wrote:
>
>
> On Thu, 3 Jun 2010, Stephen Hemminger wrote:
> >
> > The driver is a complex mess of spaghetti state. Does one of the original
> > authors have more background to fix this?
>
> Doubtful. There are no "original authors" left really. Yes, I technically
> wrote the original driver, but it has gotten seriously rewritten a couple
> of times - sadly always just expanding on the cruftyness.
>
> I do wonder a bit why you even care. You can't even buy non-USB floppy
> drives any more (and even the USB ones are really really hard to find),
> and judging by my experiences, they don't last long enough for there to be
> much of a legacy base.
>
> But please post the oops. I don't think it should ever be valid to oops
> even if it gets confused about first_read_date or last_checked. Some
> hacking around for them being "in the future" would be trivial enough.
>
> But most of them shouldn't matter. The whole 'first_read_date', for
> example, is purely used for some randomness - it tries to use the
> 'revolutions per second' to decide when to stop the drive, but that's just
> some voodoo programming and has no real meaning, afaik.
>
> The oops would be interesting just to see _which_ case it is that we care
> about the time so much (clearly _too_ much).
>
> Linus
Example warning from 2.6.32 (VMware based regression system)
[ 195.061209] floppy0: disk absent or changed during operation
[ 195.061655] end_request: I/O error, dev fd0, sector 2
[ 195.063860] Buffer I/O error on device fd0, logical block 1
[ 195.064650] lost page write due to I/O error on fd0
[ 195.067456] floppy0: disk absent or changed during operation
[ 195.067468] end_request: I/O error, dev fd0, sector 2
[ 195.068518] Buffer I/O error on device fd0, logical block 1
[ 195.069618] lost page write due to I/O error on fd0
[ 195.077148] ------------[ cut here ]------------
[ 195.077647] WARNING: at fs/buffer.c:1159 mark_buffer_dirty+0x20/0x7a()
[ 195.077699] Hardware name: VMware Virtual Platform
[ 195.077743] Modules linked in: iptable_nat iptable_filter ip6table_filter ip6table_raw ip6_tables xt_NOTRACK iptable_
raw ip_tables x_tables nf_nat_pptp nf_conntrack_pptp nf_conntrack_proto_gre nf_nat_h323 nf_conntrack_h323 nf_nat_sip nf_
conntrack_sip nf_nat_proto_gre nf_nat_tftp nf_nat_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack_tftp nf_connt
rack_ftp nf_conntrack ipv6 container ac button processor parport_pc parport psmouse serio_raw intel_agp shpchp i2c_piix4
pci_hotplug agpgart i2c_core pcspkr evdev vfat fat ext2 mbcache battery squashfs loop unionfs nls_utf8 isofs nls_base a
sync_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx md_mod sg sr_mod cdrom ata_piix sd_mod crc_t10dif
pata_acpi ata_generic mptspi mptscsih libata mptbase scsi_transport_spi floppy e1000 scsi_mod thermal fan thermal_sys [
last unloaded: raid10]
[ 195.078800] Pid: 3118, comm: umount Not tainted 2.6.32-1-586-vyatta #1
[ 195.078825] Call Trace:
[ 195.079041] [<c102bfdf>] ? warn_slowpath_common+0x5e/0x8a
[ 195.079107] [<c102c015>] ? warn_slowpath_null+0xa/0xc
[ 195.079112] [<c10bd987>] ? mark_buffer_dirty+0x20/0x7a
[ 195.079296] [<d085d37d>] ? ext2_sync_fs+0x5e/0x70 [ext2]
[ 195.079302] [<c10bc15f>] ? __sync_filesystem+0x51/0x60
[ 195.079335] [<c10a49cb>] ? generic_shutdown_super+0x19/0xc7
[ 195.079339] [<c10a4a93>] ? kill_block_super+0x1a/0x2c
[ 195.079382] [<c10d2e82>] ? vfs_quota_off+0x0/0xd
[ 195.079386] [<c10a4ff2>] ? deactivate_super+0x4b/0x61
[ 195.079391] [<c10b4f2a>] ? sys_umount+0x28c/0x2b2
[ 195.079394] [<c10b4f5b>] ? sys_oldumount+0xb/0xe
[ 195.079398] [<c10029b5>] ? syscall_call+0x7/0xb
[ 195.079469] ---[ end trace 89a1db2950506e4b ]---
[ 195.079594] floppy0: disk absent or changed during operation
[ 195.079598] end_request: I/O error, dev fd0, sector 2
[ 195.080630] Buffer I/O error on device fd0, logical block 1
[ 195.080997] lost page write due to I/O error on fd0
[ 195.084480] floppy0: disk absent or changed during operation
[ 195.084487] end_request: I/O error, dev fd0, sector 2
[ 195.085761] Buffer I/O error on device fd0, logical block 1
[ 195.086906] lost page write due to I/O error on fd0
[ 317.428247] Netfilter messages via NETLINK v0.30.
[ 317.480612] ctnetlink v0.93: registering with nfnetlink.
[ 506.734183] NET: Registered protocol family 15
On 2.6.32 example (KVM with livecd + empty floppy image) and debugging
forced on:
[ 6.795067] floppy0: reschedule timeout lock fdc
[ 6.796628] floppy: poll_drive
[ 6.797602] floppy0: setting NEWCHANGE in poll_drive
[ 6.798949] floppy0: calling disk change from floppy_ready
[ 6.800538] floppy0: checking disk change line for drive 0
[ 6.802171] floppy0: jiffies=4294893996
[ 6.803439] floppy0: disk change line=0
[ 6.804595] floppy0: flags=24
[ 6.805579] rw_command: dtime=720
[ 6.806633] floppy0: reschedule timeout do wakeup
[ 6.808198] FAT: utf8 is not a recommended IO charset for FAT filesystems, filesystem will be case sensitive!
[ 6.810797] floppy: do_fd_request
[ 6.811832] floppy0: do_fd_request
[ 6.812917] floppy0: reschedule timeout redo fd request
[ 6.814656] floppy0: checking disk change line for drive 0
[ 6.818855] floppy0: jiffies=4294894000
[ 6.820509] floppy0: disk change line=0
[ 6.822154] floppy0: flags=20
[ 6.823463] floppy0: reschedule timeout request done 1
[ 6.825272] unlock_fdc
[ 7.038143] udevd version 125 started
[ 7.841449] input: PC Speaker as /class/input/input2
[ 7.850997] piix4_smbus 0000:00:01.3: SMBus Host Controller at 0xb100, revision 0
[ 7.895128] alloc irq_desc for 24 on node -1
[ 7.896068] alloc kstat_irqs on node -1
[ 7.897640] virtio-pci 0000:00:03.0: irq 24 for MSI/MSI-X
[ 7.898998] alloc irq_desc for 25 on node -1
[ 7.900213] alloc kstat_irqs on node -1
[ 7.901382] virtio-pci 0000:00:03.0: irq 25 for MSI/MSI-X
[ 7.903096] alloc irq_desc for 26 on node -1
[ 7.904351] alloc kstat_irqs on node -1
[ 7.905550] virtio-pci 0000:00:03.0: irq 26 for MSI/MSI-X
[ 8.126101] input: Power Button as /class/input/input3
[ 8.127620] ACPI: Power Button [PWRF]
[ 8.160496] processor LNXCPU:00: registered as cooling_device0
[ 8.237244] input: ImExPS/2 Generic Explorer Mouse as /class/input/input4
[ 9.724066] floppy0: calling disk change from set_dor
[ 9.726342] floppy0: checking disk change line for drive 0
[ 9.728740] floppy0: jiffies=4294894728
[ 9.730566] floppy0: disk change line=0
[ 9.732371] floppy0: flags=20
[ 14.040103] end_request: I/O error, dev fd0, sector 2176
[ 14.041418] Buffer I/O error on device fd0, logical block 272
[ 14.042737] BUG: unable to handle kernel NULL pointer dereference at 00000040
[ 14.044052] IP: [<e08c2903>] floppy_ready+0x46f/0x4e3 [floppy]
[ 14.044052] *pde = 00000000
[ 14.044052] Oops: 0000 [#1] SMP
[ 14.044052] last sysfs file: /sys/class/net/lo/operstate
[ 14.044052] Modules linked in: ipv6 processor button psmouse virtio_net i2c_piix4 serio_raw pcspkr i2c_core evdev joydev vfat fat ext2 mbcache battery squashfs loop unionfs nls_utf8 isofs usbhid hid raid10 raid456 async_pq async_xor xor async_memcpy async_raid6_recov raid6_pq async_tx raid1 raid0 multipath linear md_mod sg sr_mod cdrom ata_piix virtio_blk pata_acpi ata_generic uhci_hcd libata virtio_pci virtio_ring usbcore nls_base floppy scsi_mod virtio thermal fan thermal_sys [last unloaded: scsi_wait_scan]
[ 14.044052]
[ 14.044052] Pid: 6, comm: events/0 Not tainted (2.6.32-1-586-vyatta #1) Bochs
[ 14.044052] EIP: 0060:[<e08c2903>] EFLAGS: 00010246 CPU: 0
[ 14.044052] EIP is at floppy_ready+0x46f/0x4e3 [floppy]
[ 14.044052] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000
[ 14.044052] ESI: 00000202 EDI: df03ffb0 EBP: e08c626c ESP: df03ff68
[ 14.044052] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 14.044052] Process events/0 (pid: 6, ti=df03e000 task=df0254a0 task.ti=df03e000)
[ 14.044052] Stack:
[ 14.044052] df03ff00 e08bf4bd e08c46d5 e08c5715 c1c07f80 e08c6268 c103c31f df0256b4
[ 14.044052] <0> df0254a0 c1c07f8c c1c07f84 e08c2d1c df0254a0 00000000 df0254a0 c103f00e
[ 14.044052] <0> df03ffa8 df03ffa8 df023f58 c1c07f80 c103c1e1 00000000 c103eddb 00000000
[ 14.044052] Call Trace:
[ 14.044052] [<e08bf4bd>] ? debugt+0x2c/0x30 [floppy]
[ 14.044052] [<c103c31f>] ? worker_thread+0x13e/0x1b6
[ 14.044052] [<e08c2d1c>] ? seek_interrupt+0x0/0xf8 [floppy]
[ 14.044052] [<c103f00e>] ? autoremove_wake_function+0x0/0x2d
[ 14.044052] [<c103c1e1>] ? worker_thread+0x0/0x1b6
[ 14.044052] [<c103eddb>] ? kthread+0x61/0x66
[ 14.044052] [<c103ed7a>] ? kthread+0x0/0x66
[ 14.044052] [<c10034a7>] ? kernel_thread_helper+0x7/0x10
[ 14.044052] Code: 20 eb 18 0f b6 05 c8 7b 8c e0 6b c0 34 8d 90 e0 6d 8c e0 3e 80 a0 e0 6d 8c e0 df 0f b6 05 c8 7b 8c e0 8b 15 00 72 8c e0 6b c0 34 <8b> 5a 40 0f bf 80 f2 6d 8c e0 39 c3 74 56 80 3a 00 79 51 b8 0f
[ 14.044052] EIP: [<e08c2903>] floppy_ready+0x46f/0x4e3 [floppy] SS:ESP 0068:df03ff68
[ 14.044052] CR2: 0000000000000040
[ 14.109388] ---[ end trace 0efe46cb49bca248 ]---
[ 14.110462] Kernel panic - not syncing: Fatal exception
[ 14.111639] Pid: 6, comm: events/0 Tainted: G D 2.6.32-1-586-vyatta #1
[ 14.113449] Call Trace:
[ 14.114235] [<c1226541>] ? panic+0x38/0xd8
[ 14.115342] [<c1005764>] ? oops_end+0x6c/0x76
[ 14.116420] [<c10190a9>] ? no_context+0x105/0x10e
[ 14.120248] [<c10191f3>] ? __bad_area_nosemaphore+0x141/0x14c
[ 14.121656] [<c1062823>] ? __rcu_process_callbacks+0x67/0x1fa
[ 14.123439] [<c10629e9>] ? rcu_process_callbacks+0x33/0x39
[ 14.125750] [<c1030f02>] ? __do_softirq+0x110/0x147
[ 14.127760] [<c103103b>] ? irq_exit+0x36/0x58
[ 14.129666] [<c101381f>] ? smp_apic_timer_interrupt+0x6c/0x76
[ 14.131942] [<c100329a>] ? apic_timer_interrupt+0x2a/0x30
[ 14.133878] [<c1019378>] ? do_page_fault+0x0/0x270
[ 14.135045] [<c1019208>] ? bad_area_nosemaphore+0xa/0xc
[ 14.136327] [<c12280d6>] ? error_code+0x66/0x70
[ 14.137427] [<e08c007b>] ? raw_cmd_done+0xc2/0x118 [floppy]
[ 14.138679] [<c1019378>] ? do_page_fault+0x0/0x270
[ 14.139815] [<e08c2903>] ? floppy_ready+0x46f/0x4e3 [floppy]
[ 14.141151] [<e08bf4bd>] ? debugt+0x2c/0x30 [floppy]
[ 14.142318] [<c103c31f>] ? worker_thread+0x13e/0x1b6
[ 14.143520] [<e08c2d1c>] ? seek_interrupt+0x0/0xf8 [floppy]
[ 14.144819] [<c103f00e>] ? autoremove_wake_function+0x0/0x2d
[ 14.146202] [<c103c1e1>] ? worker_thread+0x0/0x1b6
[ 14.147327] [<c103eddb>] ? kthread+0x61/0x66
[ 14.148495] [<c103ed7a>] ? kthread+0x0/0x66
[ 14.149549] [<c10034a7>] ? kernel_thread_helper+0x7/0x10
On 2.6.31 another example:
[ 2.034647] Uniform CD-ROM driver Revision: 3.20
[ 2.036041] sr 1:0:0:0: Attached scsi CD-ROM sr0
[ 2.043056] sr 1:0:0:0: Attached scsi generic sg0 type 5
[ 2.083934] md: linear personality registered for level -1
[ 2.089263] md: multipath personality registered for level -4
[ 2.094470] md: raid0 personality registered for level 0
[ 2.100858] md: raid1 personality registered for level 1
[ 2.102420] usb 1-1: new full speed USB device using uhci_hcd and address 2
[ 2.107393] xor: automatically using best checksumming function: pIII_sse
[ 2.128069] pIII_sse : 9200.000 MB/sec
[ 2.129289] xor: using function: pIII_sse (9200.000 MB/sec)
[ 2.131952] async_tx: api initialized (sync-only)
[ 2.200106] raid6: int32x1 1001 MB/s
[ 2.268093] raid6: int32x2 1017 MB/s
[ 2.336128] raid6: int32x4 698 MB/s
[ 2.404073] raid6: int32x8 669 MB/s
[ 2.472041] raid6: mmxx1 3167 MB/s
[ 2.540072] raid6: mmxx2 3686 MB/s
[ 2.608068] raid6: sse1x1 2875 MB/s
[ 2.676077] raid6: sse1x2 3303 MB/s
[ 2.744063] raid6: sse2x1 5762 MB/s
[ 2.812037] raid6: sse2x2 6508 MB/s
[ 2.813162] raid6: using algorithm sse2x2 (6508 MB/s)
[ 2.819556] md: raid6 personality registered for level 6
[ 2.821279] md: raid5 personality registered for level 5
[ 2.822816] md: raid4 personality registered for level 4
[ 2.847176] md: raid10 personality registered for level 10
[ 2.910253] ISO 9660 Extensions: Microsoft Joliet Level 3
[ 2.914298] ISO 9660 Extensions: RRIP_1991A
[ 2.923609] Registering unionfs 2.5.3 (for 2.6.31)
[ 2.937957] loop: module loaded
[ 2.949895] usb 1-1: New USB device found, idVendor=0627, idProduct=0001
[ 2.951870] usb 1-1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.956341] usb 1-1: Product: QEMU USB Tablet
[ 2.957564] usb 1-1: Manufacturer: QEMU 0.12.3
[ 2.959162] usb 1-1: SerialNumber: 1
[ 2.960399] usb 1-1: configuration #1 chosen from 1 choice
[ 3.011128] usbcore: registered new interface driver hiddev
[ 3.038588] input: QEMU 0.12.3 QEMU USB Tablet as /class/input/input1
[ 3.041509] generic-usb 0003:0627:0001.0001: input,hidraw0: USB HID v0.01 Pointer [QEMU 0.12.3 QEMU USB Tablet] on usb-0000:00:01.2-1/input0
[ 3.046497] usbcore: registered new interface driver usbhid
[ 3.048891] usbhid: v2.6:USB HID core driver
[ 3.113265] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 4.592572] floppy0: long rw: 1e instead of f
[ 4.594671] rs=1 s=1
[ 4.595999] rh=0 h=0
[ 4.597317] rt=1 t=0
[ 4.598514] heads=2 eoc=0
[ 4.599891] spt=15 st=0 ss=1
[ 4.601472] in_sector_offset=0
[ 7.600014]
[ 7.600677] floppy driver state
[ 7.601581] -------------------
[ 7.602438] now=4294894196 last interrupt=4294894195 diff=1 last called handler=e085c053
[ 7.604380] timeout_message=floppy start
[ 7.605365] last output bytes:
[ 7.606212] 0 80 4294894195
[ 7.607022] 8 80 4294894195
[ 7.607832] 48 80 4294894195
[ 7.608651] f 80 4294894195
[ 7.609460] 0 80 4294894195
[ 7.610275] 8 80 4294894195
[ 7.611102] 48 80 4294894195
[ 7.611971] f 80 4294894195
[ 7.612791] 0 80 4294894195
[ 7.613600] 8 80 4294894195
[ 7.614408] 48 80 4294894195
[ 7.615224] f 80 4294894195
[ 7.616047] 0 80 4294894195
[ 7.616848] 8 80 4294894195
[ 7.617649] 48 80 4294894195
[ 7.618456] f 80 4294894195
[ 7.619267] 0 80 4294894195
[ 7.620092] 8 80 4294894195
[ 7.620903] 48 80 4294894195
[ 7.621769] f 80 4294894195
[ 7.622581] last result at 4294894195
[ 7.623581] last redo_fd_request at 4294893446
[ 7.624731] 20 1
[ 7.625595] status=80
[ 7.626305] fdc_busy=1
[ 7.627026] do_floppy=e085c053
[ 7.627856] cont=e08615dc
[ 7.628637] current_req=df813d48
[ 7.629567] command_status=-1
[ 7.630464]
[ 7.631041] floppy0: floppy timeout called
[ 7.632137] end_request: I/O error, dev fd0, sector 2176
[ 7.634932] Buffer I/O error on device fd0, logical block 272
[ 7.636493] BUG: unable to handle kernel NULL pointer dereference at 00000004
[ 7.638225] IP: [<e0858d46>] reset_interrupt+0x41/0x45 [floppy]
[ 7.639660] *pde = 00000000
[ 7.640243] Oops: 0000 [#1] SMP
[ 7.640243] last sysfs file: /sys/block/loop0/size
[ 7.640243] Modules linked in: vfat fat ext2 mbcache battery squashfs usbhid hid loop unionfs nls_utf8 isofs raid10 raid456 raid6_pq async_xor async_memcpy async_tx xor raid1 raid0 multipath linear md_mod sg sr_mod cdrom virtio_blk ata_piix pata_acpi ata_generic uhci_hcd libata virtio_pci virtio_ring virtio usbcore nls_base scsi_mod floppy thermal fan thermal_sys [last unloaded: scsi_wait_scan]
[ 7.640243]
[ 7.640243] Pid: 6, comm: events/0 Not tainted (2.6.31-1-586-vyatta #1) Bochs
[ 7.640243] EIP: 0060:[<e0858d46>] EFLAGS: 00010246 CPU: 0
[ 7.640243] EIP is at reset_interrupt+0x41/0x45 [floppy]
[ 7.640243] EAX: 00000000 EBX: c183be80 ECX: c183be84 EDX: 00000080
[ 7.640243] ESI: e08615c4 EDI: df03ffb0 EBP: e08615c8 ESP: df03ff88
[ 7.640243] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 7.640243] Process events/0 (pid: 6, ti=df03e000 task=df02d450 task.ti=df03e000)
[ 7.640243] Stack:
[ 7.640243] c10377cb c183be8c c183be84 e0858d05 df02d450 00000000 df02d450 c103ac36
[ 7.640243] <0> df03ffa8 df03ffa8 df02bf58 c183be80 c1037692 00000000 c103a995 00000000
[ 7.640243] <0> 00000000 00000000 df03ffd0 df03ffd0 c103a927 00000000 00000000 c10034c7
[ 7.640243] Call Trace:
[ 7.640243] [<c10377cb>] ? worker_thread+0x139/0x1b6
[ 7.640243] [<e0858d05>] ? reset_interrupt+0x0/0x45 [floppy]
[ 7.640243] [<c103ac36>] ? autoremove_wake_function+0x0/0x2d
[ 7.640243] [<c1037692>] ? worker_thread+0x0/0x1b6
[ 7.640243] [<c103a995>] ? kthread+0x6e/0x73
[ 7.640243] [<c103a927>] ? kthread+0x0/0x73
[ 7.640243] [<c10034c7>] ? kernel_thread_helper+0x7/0x10
[ 7.640243] Code: 05 f6 80 20 2f 86 e0 04 74 1c a1 04 2f 86 e0 ff 70 08 68 d5 dc 85 e0 e8 44 32 9b e0 a1 04 2f 86 e0 ff 50 08 58 5a a1 04 2f 86 e0 <ff> 50 04 c3 e8 92 fe ff ff 83 ca ff 85 c0 78 14 25 e0 00 00 00
[ 7.640243] EIP: [<e0858d46>] reset_interrupt+0x41/0x45 [floppy] SS:ESP 0068:df03ff88
[ 7.640243] CR2: 0000000000000004
[ 7.696611] ---[ end trace 3fb89013086fe1da ]---
--
next prev parent reply other threads:[~2010-06-03 19:04 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-03 17:15 floppy driver assumes INITIAL_JIFFIES == 0 Stephen Hemminger
2010-06-03 17:28 ` Linus Torvalds
2010-06-03 19:03 ` Stephen Hemminger [this message]
2010-06-03 19:56 ` Linus Torvalds
2010-06-03 20:59 ` Linus Torvalds
2010-06-03 21:49 ` Stephen Hemminger
2010-06-03 21:58 ` Linus Torvalds
2010-06-03 22:33 ` Linus Torvalds
2010-06-03 22:54 ` Stephen Hemminger
2010-06-03 23:09 ` Linus Torvalds
2010-06-03 23:15 ` Stephen Hemminger
2010-06-03 23:21 ` Linus Torvalds
2010-06-09 5:32 ` Stephen Hemminger
2010-06-03 22:32 ` Andreas Mohr
2010-06-03 22:40 ` Linus Torvalds
2010-06-04 15:12 ` Nick Bowler
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100603120313.10a73b20@nehalam \
--to=shemminger@vyatta.com \
--cc=akpm@linux-foundation.org \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.