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Date: Mon, 19 May 2008 09:21:18 +0100 From: Richard Kennedy <richard@....demon.co.uk> To: James Morris <jmorris@...ei.org> Cc: sds@...ho.nsa.gov, lkml <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] selinux: reorder inode_security_struct to increase objs/slab on 64bit On Mon, 2008-05-19 at 09:18 +1000, James Morris wrote: > On Sun, 18 May 2008, Richard Kennedy wrote: > > > reorder inode_security_struct to remove padding on 64 bit builds > > > > size reduced from 72 to 64 bytes increasing objects per slab to 64. > > > > Signed-off-by: Richard Kennedy <richard@....demon.co.uk> > > Thanks, applied to > git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6.git#for-akpm > > (Although I see a reduction from 164 to 160 bytes). > > > - James In that case I think you've got all the lock & mutex debugging turned on :) CONFIG_DEBUG_MUTEXES & CONFIG_DEBUG_LOCK_ALLOC will add a lot to the mutex directly. CONFIG_GENERIC_LOCKBREAK, CONFIG_DEBUG_SPINLOCK & CONFIG_DEBUG_LOCK_ALLOC will each grow the spinlock contained in the mutex. However, I'm seeing all structures packed to size of 8n -- so I'd never get a sizeof 164. Maybe that's just a platform/compiler difference ? I'm running on AMD 64 & gcc 4.1.2 Richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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