From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Sven Eckelmann <sven@narfation.org>,
akpm@linux-foundation.org, brouer@redhat.com, cl@linux.com,
efault@gmx.de, iamjoonsoo.kim@lge.com, jannh@google.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
mgorman@techsingularity.net, penberg@kernel.org,
rientjes@google.com, tglx@linutronix.de,
Stephen Rothwell <sfr@canb.auug.org.au>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH v4 35/35] mm, slub: convert kmem_cpu_slab protection to local_lock
Date: Tue, 17 Aug 2021 11:34:08 +0200 [thread overview]
Message-ID: <20210817093408.zanfoybsbnrdnav7@linutronix.de> (raw)
In-Reply-To: <3da13f0a-2720-a38c-33a7-744668013390@suse.cz>
On 2021-08-17 11:31:56 [+0200], Vlastimil Babka wrote:
> On 8/17/21 11:12 AM, Sebastian Andrzej Siewior wrote:
> > On 2021-08-17 10:37:48 [+0200], Vlastimil Babka wrote:
> >> OK reproduced. Thanks, will investigate.
> >
> > With the local_lock at the top, the needed alignment gets broken for dbl
> > cmpxchg.
>
> Right. I wondered why the checks in __pcpu_double_call_return_bool
> didn't trigger. They are VM_BUG_ON() so they did trigger after enabling
> DEBUG_VM.
Without the right debugging enabled
| typedef struct {
| #ifdef CONFIG_DEBUG_LOCK_ALLOC
| struct lockdep_map dep_map;
| struct task_struct *owner;
| #endif
| } local_lock_t;
the struct is just empty.
Sebastian
next prev parent reply other threads:[~2021-08-17 9:34 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-05 15:19 [PATCH v4 00/35] SLUB: reduce irq disabled scope and make it RT compatible Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 01/35] mm, slub: don't call flush_all() from slab_debug_trace_open() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 02/35] mm, slub: allocate private object map for debugfs listings Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 03/35] mm, slub: allocate private object map for validate_slab_cache() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 04/35] mm, slub: don't disable irq for debug_check_no_locks_freed() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 05/35] mm, slub: remove redundant unfreeze_partials() from put_cpu_partial() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 06/35] mm, slub: unify cmpxchg_double_slab() and __cmpxchg_double_slab() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 07/35] mm, slub: extract get_partial() from new_slab_objects() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 08/35] mm, slub: dissolve new_slab_objects() into ___slab_alloc() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 09/35] mm, slub: return slab page from get_partial() and set c->page afterwards Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 10/35] mm, slub: restructure new page checks in ___slab_alloc() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 11/35] mm, slub: simplify kmem_cache_cpu and tid setup Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 12/35] mm, slub: move disabling/enabling irqs to ___slab_alloc() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 13/35] mm, slub: do initial checks in ___slab_alloc() with irqs enabled Vlastimil Babka
2021-08-15 10:14 ` Vlastimil Babka
2021-08-15 10:22 ` Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 14/35] mm, slub: move disabling irqs closer to get_partial() in ___slab_alloc() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 15/35] mm, slub: restore irqs around calling new_slab() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 16/35] mm, slub: validate slab from partial list or page allocator before making it cpu slab Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 17/35] mm, slub: check new pages with restored irqs Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 18/35] mm, slub: stop disabling irqs around get_partial() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 19/35] mm, slub: move reset of c->page and freelist out of deactivate_slab() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 20/35] mm, slub: make locking in deactivate_slab() irq-safe Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 21/35] mm, slub: call deactivate_slab() without disabling irqs Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 22/35] mm, slub: move irq control into unfreeze_partials() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 23/35] mm, slub: discard slabs in unfreeze_partials() without irqs disabled Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 24/35] mm, slub: detach whole partial list at once in unfreeze_partials() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 25/35] mm, slub: separate detaching of partial list in unfreeze_partials() from unfreezing Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 26/35] mm, slub: only disable irq with spin_lock in __unfreeze_partials() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 27/35] mm, slub: don't disable irqs in slub_cpu_dead() Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 28/35] mm, slab: make flush_slab() possible to call with irqs enabled Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 29/35] mm: slub: Move flush_cpu_slab() invocations __free_slab() invocations out of IRQ context Vlastimil Babka
2021-08-09 13:41 ` Qian Cai
2021-08-09 18:44 ` Mike Galbraith
2021-08-09 20:08 ` Vlastimil Babka
2021-08-09 22:13 ` Qian Cai
2021-08-10 1:07 ` Mike Galbraith
2021-08-10 9:03 ` Vlastimil Babka
2021-08-10 11:47 ` Mike Galbraith
2021-08-10 20:31 ` Paul E. McKenney
2021-08-10 22:36 ` Vlastimil Babka
2021-08-10 23:53 ` Paul E. McKenney
2021-08-11 14:17 ` Paul E. McKenney
2021-08-10 20:25 ` Paul E. McKenney
2021-08-10 14:33 ` Vlastimil Babka
2021-08-11 1:42 ` Qian Cai
2021-08-11 8:55 ` Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 30/35] mm: slub: Make object_map_lock a raw_spinlock_t Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 31/35] mm, slub: optionally save/restore irqs in slab_[un]lock()/ Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 32/35] mm, slub: make slab_lock() disable irqs with PREEMPT_RT Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 33/35] mm, slub: protect put_cpu_partial() with disabled irqs instead of cmpxchg Vlastimil Babka
2021-08-05 15:19 ` [PATCH v4 34/35] mm, slub: use migrate_disable() on PREEMPT_RT Vlastimil Babka
2021-08-05 15:20 ` [PATCH v4 35/35] mm, slub: convert kmem_cpu_slab protection to local_lock Vlastimil Babka
2021-08-15 12:27 ` Sven Eckelmann
2021-08-17 8:37 ` Vlastimil Babka
2021-08-17 9:12 ` Sebastian Andrzej Siewior
2021-08-17 9:17 ` Vlastimil Babka
2021-08-17 9:31 ` Sebastian Andrzej Siewior
2021-08-17 9:31 ` Vlastimil Babka
2021-08-17 9:34 ` Sebastian Andrzej Siewior [this message]
2021-08-17 9:13 ` Vlastimil Babka
2021-08-17 10:14 ` Vlastimil Babka
2021-08-17 19:53 ` Andrew Morton
2021-08-18 11:52 ` Vlastimil Babka
2021-08-23 20:36 ` Thomas Gleixner
2021-08-17 15:39 ` Sebastian Andrzej Siewior
2021-08-17 15:41 ` Vlastimil Babka
2021-08-17 15:49 ` Sebastian Andrzej Siewior
2021-08-17 15:56 ` Vlastimil Babka
2021-08-05 16:42 ` [PATCH v4 00/35] SLUB: reduce irq disabled scope and make it RT compatible Sebastian Andrzej Siewior
2021-08-06 5:14 ` Mike Galbraith
2021-08-06 7:45 ` Vlastimil Babka
2021-08-10 14:36 ` Vlastimil Babka
2021-08-15 10:18 ` Vlastimil Babka
2021-08-17 10:23 ` Vlastimil Babka
2021-08-17 15:59 ` Vlastimil Babka
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