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Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 6/27/24 9:45 PM, Borah, Chaitanya Kumar wrote: > [converted to plain text] > +intel-gfx > > Gentle Reminder. > Hello, This patch will be dropped from mm-unstable and will not be in linux-next after that. I am working on a fix to include for the next version of this series. Thanks, Sid > From: Borah, Chaitanya Kumar > Sent: Wednesday, June 26, 2024 8:52 PM > To: sidhartha.kumar@oracle.com > Cc: Liam.Howlett@oracle.com; akpm@linux-foundation.org; linux-mm@kvack.org; maple-tree@lists.infradead.org; Nikula, Jani ; Saarinen, Jani ; Kurmi, Suresh Kumar > Subject: Regression on linux-next (next-20240625) > > Hello Sidhartha, > > Hope you are doing well. I am Chaitanya from the linux graphics team in Intel. > > This mail is regarding a regression we are seeing in our CI runs[1] on linux-next repository. > > Since the version next-20240625 [2], we are seeing the following regression > > ````````````````````````````````````````````````````````````````````````````````` > <3>[    2.336948] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:337 > <3>[    2.336974] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 95, name: kdevtmpfs > <3>[    2.336989] preempt_count: 1, expected: 0 > <3>[    2.336998] RCU nest depth: 0, expected: 0 > <4>[    2.337006] 3 locks held by kdevtmpfs/95: > <4>[    2.337015]  #0: ffff888100d2c3f0 (sb_writers){.+.+}-{0:0}, at: filename_create+0x5d/0x160 > <4>[    2.337041]  #1: ffff888100800840 (&type->i_mutex_dir_key/1){+.+.}-{3:3}, at: filename_create+0x9d/0x160 > <4>[    2.337065]  #2: ffff888100800658 (&simple_offset_lock_class){+.+.}-{2:2}, at: mtree_alloc_cyclic+0x71/0xf0 > <3>[    2.337089] Preemption disabled at: > <3>[    2.337091] [<0000000000000000>] 0x0 > <4>[    2.337105] CPU: 13 UID: 0 PID: 95 Comm: kdevtmpfs Not tainted 6.10.0-rc5-next-20240625-next-20240625-g0fc4bfab2cd4+ #1 > <4>[    2.337126] Hardware name: ASUS System Product Name/PRIME Z790-P WIFI, BIOS 0812 02/24/2023 > <4>[    2.337141] Call Trace: > <4>[    2.337147]  > <4>[    2.337152]  dump_stack_lvl+0xb0/0xd0 > <4>[    2.337163]  __might_resched+0x194/0x2b0 > <4>[    2.337175]  kmem_cache_alloc_noprof+0x20c/0x280 > <4>[    2.337186]  ? mas_alloc_nodes+0x173/0x230 > <4>[    2.337197]  mas_alloc_nodes+0x173/0x230 > <4>[    2.337207]  mas_alloc_cyclic+0x27b/0x550 > <4>[    2.337220]  mtree_alloc_cyclic+0x92/0xf0 > ````````````````````````````````````````````````````````````````````````````````` > Details log can be found in [3]. > > After bisecting the tree, the following patch [4] seems to be the first "bad" > commit > > ````````````````````````````````````````````````````````````````````````````````````````````````````````` >     maple_tree: remove mas_destroy() from mas_nomem() > >     Separate call to mas_destroy() from mas_nomem() so we can check for no >     memory errors without destroying the current maple state in >     mas_store_gfp().  We then add calls to mas_destroy() to callers of >     mas_nomem(). > >     Link: https://lkml.kernel.org/r/20240618204750.79512-6-sidhartha.kumar@oracle.com >     Signed-off-by: Sidhartha Kumar mailto:sidhartha.kumar@oracle.com > > ````````````````````````````````````````````````````````````````````````````````````````````````````````` > > We could not revert the patch because of merge conflicts but resetting to the parent of the commit seems to fix the issue. > > Could you please check why the patch causes this regression and provide a fix if necessary? > > Thank you. > > Regards > > Chaitanya > > [1] https://intel-gfx-ci.01.org/tree/linux-next/combined-alt.html? > [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20240625 > [3] https://intel-gfx-ci.01.org/tree/linux-next/next-20240625/bat-rpls-4/boot0.txt > [4] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=187827d2dc3749d66546696b78584ee4c54687b0