From: Christoph Lameter <cl@linux-foundation.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
linux-arch@vger.kernel.org
Subject: Re: [patch] mm: rewrite vmap layer
Date: Tue, 19 Aug 2008 09:42:36 -0500 [thread overview]
Message-ID: <48AADBDC.2000608@linux-foundation.org> (raw)
In-Reply-To: <20080818133224.GA5258@wotan.suse.de>
Nick Piggin wrote:
> +static void free_unmap_vmap_area(struct vmap_area *va)
> +{
> + va->flags |= VM_LAZY_FREE;
> + atomic_add((va->va_end - va->va_start) >> PAGE_SHIFT, &vmap_lazy_nr);
> + if (unlikely(atomic_read(&vmap_lazy_nr) > LAZY_MAX))
> + purge_vmap_area_lazy();
> +}
Could you check here if we are in an atomic context and then simply not purge
the vmap area? That may we may get to a vfree that can be run in an atomic
context.
Or run purge_vma_area_lazy from keventd?
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Lameter <cl@linux-foundation.org>
To: Nick Piggin <npiggin@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
linux-arch@vger.kernel.org
Subject: Re: [patch] mm: rewrite vmap layer
Date: Tue, 19 Aug 2008 09:42:36 -0500 [thread overview]
Message-ID: <48AADBDC.2000608@linux-foundation.org> (raw)
In-Reply-To: <20080818133224.GA5258@wotan.suse.de>
Nick Piggin wrote:
> +static void free_unmap_vmap_area(struct vmap_area *va)
> +{
> + va->flags |= VM_LAZY_FREE;
> + atomic_add((va->va_end - va->va_start) >> PAGE_SHIFT, &vmap_lazy_nr);
> + if (unlikely(atomic_read(&vmap_lazy_nr) > LAZY_MAX))
> + purge_vmap_area_lazy();
> +}
Could you check here if we are in an atomic context and then simply not purge
the vmap area? That may we may get to a vfree that can be run in an atomic
context.
Or run purge_vma_area_lazy from keventd?
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next prev parent reply other threads:[~2008-08-19 14:43 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-18 13:32 [patch] mm: rewrite vmap layer Nick Piggin
2008-08-18 13:32 ` Nick Piggin
2008-08-19 0:24 ` Andrew Morton
2008-08-19 0:24 ` Andrew Morton
2008-08-19 7:37 ` Russell King
2008-08-19 7:37 ` Russell King
2008-08-19 10:39 ` Nick Piggin
2008-08-19 10:39 ` Nick Piggin
2008-08-20 3:32 ` Kyle McMartin
2008-08-20 3:32 ` Kyle McMartin
2008-08-19 10:02 ` Nick Piggin
2008-08-19 10:02 ` Nick Piggin
2008-08-19 14:42 ` Christoph Lameter [this message]
2008-08-19 14:42 ` Christoph Lameter
2008-08-20 9:02 ` Nick Piggin
2008-08-20 9:02 ` Nick Piggin
2008-08-20 14:03 ` Christoph Lameter
2008-08-20 14:03 ` Christoph Lameter
2008-08-20 16:22 ` Nick Piggin
2008-08-20 16:22 ` Nick Piggin
2008-08-20 16:50 ` Christoph Lameter
2008-08-20 16:50 ` Christoph Lameter
2008-08-20 16:59 ` Nick Piggin
2008-08-20 16:59 ` Nick Piggin
2008-08-20 17:05 ` Christoph Lameter
2008-08-20 17:05 ` Christoph Lameter
2008-08-20 17:48 ` Nick Piggin
2008-08-20 17:48 ` Nick Piggin
2008-08-21 7:19 ` Johannes Weiner
2008-08-21 7:19 ` Johannes Weiner
2008-08-21 13:13 ` Christoph Lameter
2008-08-21 13:13 ` Christoph Lameter
2008-09-05 3:06 ` Andrew Morton
2008-09-05 3:06 ` Andrew Morton
2008-09-07 12:06 ` Nick Piggin
2008-09-07 12:06 ` Nick Piggin
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