RE: [EXT] Re: Ask help about this patch b951aaff5035 " mm: enable page allocation tagging"

From: Carlos Song
Date: Thu Mar 27 2025 - 04:26:17 EST




> -----Original Message-----
> From: Kent Overstreet <kent.overstreet@xxxxxxxxx>
> Sent: Thursday, March 20, 2025 7:25 PM
> To: Carlos Song <carlos.song@xxxxxxx>
> Cc: surenb@xxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx; willy@xxxxxxxxxxxxx;
> linux-mm@xxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> linux-fsdevel@xxxxxxxxxxxxxxx
> Subject: [EXT] Re: Ask help about this patch b951aaff5035 " mm: enable page
> allocation tagging"
>
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> opening attachments. When in doubt, report the message using the 'Report this
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>
>
> On Thu, Mar 20, 2025 at 11:07:41AM +0000, Carlos Song wrote:
> > Hi, all
> >
> > I found a 300ms~600ms IRQ off when writing 1Gb data to mmc device at
> I.MX7d SDB board at Linux-kernel-v6.14.
> > But I test the same case at Linux-kernel-v6.7, this longest IRQ off time is only
> 1ms~2ms. So the issue is introduced from v6.7~v6.14.
> >
> > Run this cmd to test:
> > dd if=/dev/zero of=/dev/mmcblk2p4 bs=4096 seek=12500 count=256000
> > conv=fsync
> >
> > This issue looks from blkdev_buffered_write() function. Because when I
> > run this cmd with "oflag=direct" to use blkdev_direct_write(), I can not see
> any long time IRQ off.
> >
> > Then I use Ftrace irqoff tracer to trace the longest IRQ off event, I found some
> differences between v6.7 and v6.14:
> > In iomap_file_buffered_write(), __folio_alloc (in v6.7) is replaced by
> _folio_alloc_noprof (in v6.14) by this patch.
> > The spinlock disabled IRQ ~300ms+. It looks there are some fixes for this patch,
> but I still can see IRQ off 300ms+ at 6.14.0-rc7-next-20250319.
> >
> > Do I trigger one bug? I know little about mem so I have to report it and hope I
> can get some help or guide.
> > I put my ftrace log at the mail tail to help trace and explain.
>
> Did you track down which spinlock?
>
> >

Hi,

Sorry for my late reply and thank you for your quick reply!
>From the trace log, I think the spinlock is from here like this:

__alloc_frozen_pages_noprof ==> get_page_from_freelist==>spinclok

Do you need other log not only this?

> > => get_page_from_freelist"
> > => __alloc_frozen_pages_noprof
> > => __folio_alloc_noprof
> > => __filemap_get_folio


> > commit b951aaff503502a7fe066eeed2744ba8a6413c89
> > Author: Suren Baghdasaryan
> surenb@xxxxxxxxxx<mailto:surenb@xxxxxxxxxx>
> > Date: Thu Mar 21 09:36:40 2024 -0700
> >
> > mm: enable page allocation tagging
> >
> > Redefine page allocators to record allocation tags upon their invocation.
> > Instrument post_alloc_hook and free_pages_prepare to modify current
> > allocation tag.
> >
> > [surenb@xxxxxxxxxx: undo _noprof additions in the documentation]
> > Link:
> https://lkml.kern/
> el.org%2Fr%2F20240326231453.1206227-3-surenb%40google.com&data=05%
> 7C02%7Ccarlos.song%40nxp.com%7Cdf027bbb97074fc2cde808dd67a1d6c5%7
> C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638780666983046738%
> 7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDA
> wMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C
> &sdata=Aby13KyQjF5pcbYW%2BkfsEJLiaPmS2ZiJLUHJ%2BCr2JXM%3D&reserve
> d=0
> > Link:
> https://lkml.kern/
> el.org%2Fr%2F20240321163705.3067592-19-surenb%40google.com&data=05
> %7C02%7Ccarlos.song%40nxp.com%7Cdf027bbb97074fc2cde808dd67a1d6c5%
> 7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638780666983065790
> %7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMD
> AwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7
> C&sdata=n0hjs2fhjYs%2BcnbrxHy4vFK6D4GFVL4%2Fu72anOOLiEI%3D&reserve
> d=0
> > Signed-off-by: Suren Baghdasaryan
> surenb@xxxxxxxxxx<mailto:surenb@xxxxxxxxxx>
> > Co-developed-by: Kent Overstreet
> kent.overstreet@xxxxxxxxx<mailto:kent.overstreet@xxxxxxxxx>
> > Signed-off-by: Kent Overstreet
> kent.overstreet@xxxxxxxxx<mailto:kent.overstreet@xxxxxxxxx>
> > Reviewed-by: Kees Cook
> keescook@xxxxxxxxxxxx<mailto:keescook@xxxxxxxxxxxx>
> > Tested-by: Kees Cook
> keescook@xxxxxxxxxxxx<mailto:keescook@xxxxxxxxxxxx>
> > Cc: Alexander Viro
> viro@xxxxxxxxxxxxxxxxxx<mailto:viro@xxxxxxxxxxxxxxxxxx>
> > Cc: Alex Gaynor
> alex.gaynor@xxxxxxxxx<mailto:alex.gaynor@xxxxxxxxx>
> > Cc: Alice Ryhl aliceryhl@xxxxxxxxxx<mailto:aliceryhl@xxxxxxxxxx>
> > Cc: Andreas Hindborg
> a.hindborg@xxxxxxxxxxx<mailto:a.hindborg@xxxxxxxxxxx>
> > Cc: Benno Lossin
> benno.lossin@xxxxxxxxx<mailto:benno.lossin@xxxxxxxxx>
> > Cc: "Björn Roy Baron"
> bjorn3_gh@xxxxxxxxxxxxxx<mailto:bjorn3_gh@xxxxxxxxxxxxxx>
> > Cc: Boqun Feng
> boqun.feng@xxxxxxxxx<mailto:boqun.feng@xxxxxxxxx>
> > Cc: Christoph Lameter cl@xxxxxxxxx<mailto:cl@xxxxxxxxx>
> > Cc: Dennis Zhou dennis@xxxxxxxxxx<mailto:dennis@xxxxxxxxxx>
> > Cc: Gary Guo gary@xxxxxxxxxxx<mailto:gary@xxxxxxxxxxx>
> > Cc: Miguel Ojeda ojeda@xxxxxxxxxx<mailto:ojeda@xxxxxxxxxx>
> > Cc: Pasha Tatashin
> pasha.tatashin@xxxxxxxxxx<mailto:pasha.tatashin@xxxxxxxxxx>
> > Cc: Peter Zijlstra peterz@xxxxxxxxxxxxx<mailto:peterz@xxxxxxxxxxxxx>
> > Cc: Tejun Heo tj@xxxxxxxxxx<mailto:tj@xxxxxxxxxx>
> > Cc: Vlastimil Babka vbabka@xxxxxxx<mailto:vbabka@xxxxxxx>
> > Cc: Wedson Almeida Filho
> wedsonaf@xxxxxxxxx<mailto:wedsonaf@xxxxxxxxx>
> > Signed-off-by: Andrew Morton
> > akpm@xxxxxxxxxxxxxxxxxxxx<mailto:akpm@xxxxxxxxxxxxxxxxxxxx>
> >
> >
> > Ftrace irqoff tracer shows detail:
> > At v6.14:
> > # tracer: irqsoff
> > #
> > # irqsoff latency trace v1.1.5 on 6.14.0-rc7-next-20250319 #
> > --------------------------------------------------------------------
> > # latency: 279663 us, #21352/21352, CPU#0 | (M:NONE VP:0, KP:0, SP:0 HP:0
> #P:2)
> > # -----------------
> > # | task: dd-805 (uid:0 nice:0 policy:0 rt_prio:0)
> > # -----------------
> > # => started at: __rmqueue_pcplist
> > # => ended at: _raw_spin_unlock_irqrestore
> > #
> > #
> > # _------=> CPU#
> > # / _-----=> irqs-off/BH-disabled
> > # | / _----=> need-resched
> > # || / _---=> hardirq/softirq
> > # ||| / _--=> preempt-depth
> > # |||| / _-=> migrate-disable
> > # ||||| / delay
> > # cmd pid |||||| time | caller
> > # \ / |||||| \ | /
> > dd-805 0d.... 1us : __rmqueue_pcplist
> > dd-805 0d.... 3us : _raw_spin_trylock
> <-__rmqueue_pcplist
> > dd-805 0d.... 7us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > dd-805 0d.... 10us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > dd-805 0d.... 12us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > dd-805 0d.... 15us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > dd-805 0d.... 17us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > dd-805 0d.... 19us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > ...
> > dd-805 0d.... 1535us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 1538us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 1539us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 1542us+: try_to_claim_block
> <-__rmqueue_pcplist
> > dd-805 0d.... 1597us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 1599us+: try_to_claim_block
> <-__rmqueue_pcplist
> > dd-805 0d.... 1674us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 1676us+: try_to_claim_block
> <-__rmqueue_pcplist
> > dd-805 0d.... 1716us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 1718us+: try_to_claim_block
> <-__rmqueue_pcplist
> > dd-805 0d.... 1801us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 1803us+: try_to_claim_block
> <-__rmqueue_pcplist
> > ...
> > dd-805 0d.... 279555us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 279556us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 279558us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 279560us+: try_to_claim_block
> <-__rmqueue_pcplist
> > dd-805 0d.... 279616us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 279618us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > dd-805 0d.... 279620us : find_suitable_fallback
> <-__rmqueue_pcplist
> > ...
> > dd-805 0d.... 279658us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-805 0d.... 279660us : _raw_spin_unlock_irqrestore
> <-__rmqueue_pcplist
> > dd-805 0d.... 279662us : _raw_spin_unlock_irqrestore
> > dd-805 0d.... 279666us+: trace_hardirqs_on
> <-_raw_spin_unlock_irqrestore
> > dd-805 0d.... 279712us : <stack trace>
> > => get_page_from_freelist
> > => __alloc_frozen_pages_noprof
> > => __folio_alloc_noprof
> > => __filemap_get_folio
> > => iomap_write_begin
> > => iomap_file_buffered_write
> > => blkdev_write_iter
> > => vfs_write
> > => ksys_write
> > => ret_fast_syscall
> >
> > At v6.7:
> > # tracer: irqsoff
> > #
> > # irqsoff latency trace v1.1.5 on 6.7.0 #
> > --------------------------------------------------------------------
> > # latency: 2477 us, #146/146, CPU#0 | (M:server VP:0, KP:0, SP:0 HP:0 #P:2)
> > # -----------------
> > # | task: dd-808 (uid:0 nice:0 policy:0 rt_prio:0)
> > # -----------------
> > # => started at: _raw_spin_lock_irqsave
> > # => ended at: _raw_spin_unlock_irqrestore
> > #
> > #
> > # _------=> CPU#
> > # / _-----=> irqs-off/BH-disabled
> > # | / _----=> need-resched
> > # || / _---=> hardirq/softirq
> > # ||| / _--=> preempt-depth
> > # |||| / _-=> migrate-disable
> > # ||||| / delay
> > # cmd pid |||||| time | caller
> > # \ / |||||| \ | /
> > dd-808 0d.... 1us!: _raw_spin_lock_irqsave
> > dd-808 0d.... 186us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 189us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 191us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 192us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 194us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 196us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 199us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 203us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 330us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 332us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 334us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 336us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 338us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 339us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 341us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 343us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 479us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 481us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 483us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 485us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 486us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 488us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 490us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 492us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 630us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 632us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 634us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 636us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 638us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 640us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 642us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 644us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 771us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 773us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 775us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 777us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 778us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 780us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 782us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 784us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 911us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 913us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 915us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 916us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 918us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 920us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 922us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 924us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 1055us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1058us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1059us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1061us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1063us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1065us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1066us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1068us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 1194us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1196us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1198us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1200us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1202us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1203us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1205us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1208us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 1333us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1335us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1337us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1339us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1341us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1342us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1344us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1346us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 1480us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1482us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1484us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1486us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1488us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1490us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1492us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1494us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 1621us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1623us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1625us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1627us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1629us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1630us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1632us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1634us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 1761us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1763us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1765us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1766us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1768us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1770us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1772us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1774us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 1900us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1902us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1903us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1905us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1907us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1909us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1911us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 1913us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 2038us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2040us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2042us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2044us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2046us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2047us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2049us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2051us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2053us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2055us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 2175us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2176us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2178us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2180us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2182us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2183us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2185us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2187us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2189us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2191us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2192us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2194us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2196us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 2323us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2325us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2327us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2328us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2330us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2332us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2334us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2335us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2337us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2339us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2341us : find_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2343us : steal_suitable_fallback
> <-__rmqueue_pcplist
> > dd-808 0d.... 2345us!: move_freepages_block
> <-steal_suitable_fallback
> > dd-808 0d.... 2470us : __mod_zone_page_state
> <-__rmqueue_pcplist
> > dd-808 0d.... 2473us : _raw_spin_unlock_irqrestore
> <-__rmqueue_pcplist
> > dd-808 0d.... 2476us : _raw_spin_unlock_irqrestore
> > dd-808 0d.... 2479us+: tracer_hardirqs_on
> <-_raw_spin_unlock_irqrestore
> > dd-808 0d.... 2520us : <stack trace>
> > => get_page_from_freelist
> > => __alloc_pages
> > => __folio_alloc
> > => __filemap_get_folio
> > => iomap_write_begin
> > => iomap_file_buffered_write
> > => blkdev_write_iter
> > => vfs_write
> > => ksys_write
> > => ret_fast_syscall
> >
> > Best Regard
> > Carlos Song
> >