Thread (7 messages) 7 messages, 2 authors, 2012-05-23

Re: [PATCH v6 2/2] decrement static keys on real destroy time

From: Andrew Morton <akpm@linux-foundation.org>
Date: 2012-05-23 20:33:56
Also in: linux-mm, netdev

On Wed, 23 May 2012 13:16:36 +0400
Glauber Costa [off-list ref] wrote:
On 05/23/2012 02:46 AM, Andrew Morton wrote:
quoted
Here, we're open-coding kinda-test_bit().  Why do that?  These flags are
modified with set_bit() and friends, so we should read them with the
matching test_bit()?
My reasoning was to be as cheap as possible, as you noted yourself two
paragraphs below.
These aren't on any fast path, are they?

Plus: you failed in that objective!  The C compiler's internal
scalar->bool conversion makes these functions no more efficient than
test_bit().
quoted
So here are suggested changes from*some*  of the above discussion.
Please consider, incorporate, retest and send us a v7?
How do you want me to do it? Should I add your patch ontop of mine,
and then another one that tweaks whatever else is left, or should I just
merge those changes into the patches I have?
A brand new patch, I guess.  I can sort out the what-did-he-change view
at this end.

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org.  For more info on Linux MM,
see: http://www.linux-mm.org/ .
Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help