* Can kmem_cache_free block?
@ 2008-03-28 19:23 Steve French
2008-03-29 1:15 ` Nick Piggin
0 siblings, 1 reply; 2+ messages in thread
From: Steve French @ 2008-03-28 19:23 UTC (permalink / raw)
To: lkml
Is kmem_cache_free safe to call while holding a spinlock (can
kmem_cache_free ever block or recurse into a file system)?
I see it trying to grab just another spinlock which is probably fine
(but was worried whether any of the worker functions called a sem) ...
my assumption is that it would be safe, but the man page doesn't
mention when it can be used safely.
--
Thanks,
Steve
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Can kmem_cache_free block?
2008-03-28 19:23 Can kmem_cache_free block? Steve French
@ 2008-03-29 1:15 ` Nick Piggin
0 siblings, 0 replies; 2+ messages in thread
From: Nick Piggin @ 2008-03-29 1:15 UTC (permalink / raw)
To: Steve French; +Cc: lkml
On Saturday 29 March 2008 06:23, Steve French wrote:
> Is kmem_cache_free safe to call while holding a spinlock (can
> kmem_cache_free ever block or recurse into a file system)?
>
> I see it trying to grab just another spinlock which is probably fine
> (but was worried whether any of the worker functions called a sem) ...
> my assumption is that it would be safe, but the man page doesn't
> mention when it can be used safely.
Yes you can call it from any context.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2008-03-28 19:23 Can kmem_cache_free block? Steve French
2008-03-29 1:15 ` Nick Piggin
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