From: Christoph Hellwig <hch@lst.de>
To: akpm@linux-foundation.org
Cc: joelaf@google.com, jszhang@marvell.com, chris@chris-wilson.co.uk,
joaodias@google.com, linux-mm@kvack.org,
linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 4/7] mm: defer vmalloc from atomic context
Date: Sat, 22 Oct 2016 17:17:17 +0200 [thread overview]
Message-ID: <1477149440-12478-5-git-send-email-hch@lst.de> (raw)
In-Reply-To: <1477149440-12478-1-git-send-email-hch@lst.de>
We want to be able to use a sleeping lock for freeing vmap to keep
latency down. For this we need to use the deferred vfree mechanisms
no only from interrupt, but from any atomic context.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
mm/vmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index a4e2cec..bcc1a64 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1509,7 +1509,7 @@ void vfree(const void *addr)
if (!addr)
return;
- if (unlikely(in_interrupt())) {
+ if (unlikely(in_atomic())) {
struct vfree_deferred *p = this_cpu_ptr(&vfree_deferred);
if (llist_add((struct llist_node *)addr, &p->list))
schedule_work(&p->wq);
--
2.1.4
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next prev parent reply other threads:[~2016-10-22 15:17 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-22 15:17 reduce latency in __purge_vmap_area_lazy Christoph Hellwig
2016-10-22 15:17 ` [PATCH 1/7] mm: remove free_unmap_vmap_area_noflush Christoph Hellwig
2016-10-22 15:17 ` [PATCH 2/7] mm: remove free_unmap_vmap_area_addr Christoph Hellwig
2016-10-22 15:17 ` [PATCH 3/7] mm: refactor __purge_vmap_area_lazy Christoph Hellwig
2016-10-22 15:17 ` Christoph Hellwig [this message]
2016-10-24 15:44 ` [PATCH 4/7] mm: defer vmalloc from atomic context Andrey Ryabinin
2016-11-05 3:43 ` Joel Fernandes
2016-11-07 15:01 ` Andrey Ryabinin
2016-11-07 15:09 ` Christoph Hellwig
2016-11-08 15:03 ` Andrey Ryabinin
2016-11-08 15:05 ` [PATCH 1/3] mm/vmalloc: add vfree_atomic() Andrey Ryabinin
2016-11-08 15:05 ` [PATCH 2/3] kernel/fork: use vfree_atomic() to free thread stack Andrey Ryabinin
2016-11-08 15:05 ` [PATCH 3/3] x86/ldt: use vfree_atomic() to free ldt entries Andrey Ryabinin
2016-11-07 16:50 ` [PATCH 4/7] mm: defer vmalloc from atomic context Joel Fernandes
2016-10-22 15:17 ` [PATCH 5/7] mm: mark all calls into the vmalloc subsystem as potentially sleeping Christoph Hellwig
2016-10-22 15:17 ` [PATCH 6/7] mm: turn vmap_purge_lock into a mutex Christoph Hellwig
2016-10-22 15:17 ` [PATCH 7/7] mm: add preempt points into __purge_vmap_area_lazy Christoph Hellwig
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