From: "David S. Miller" <davem@davemloft.net>
To: dada1@cosmosbay.com
Cc: ak@suse.de, bcrl@linux.intel.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] struct file cleanup : the very large file_ra_state is now allocated only on demand.
Date: Thu, 18 Aug 2005 00:18:54 -0700 (PDT) [thread overview]
Message-ID: <20050818.001854.21765805.davem@davemloft.net> (raw)
In-Reply-To: <43043567.3040204@cosmosbay.com>
From: Eric Dumazet <dada1@cosmosbay.com>
Date: Thu, 18 Aug 2005 09:14:47 +0200
> After reading your suggestions, I understand we still need two slabs.
> One (filp_cachep) without the readahead data, the other one
> (filp_ra_cachep) with it.
Correct.
> static inline struct file_ra_state *get_ra_state(struct file *f)
> {
> #ifdef CONFIG_DEBUG_READAHEAD
> BUG_ON(filp_ra_cachep != GET_PAGE_CACHE(virt_to_page(f)));
> #endif
> return (struct file_ra_state *)(f+1);
> }
Or, instead of mucking with SLAB internals, just put something like
a "filp_ra_present" debugging binary state into filp while it gets
debugged.
next prev parent reply other threads:[~2005-08-18 7:18 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20050810164655.GB4162@linux.intel.com>
[not found] ` <20050810.135306.79296985.davem@davemloft.net>
[not found] ` <20050810211737.GA21581@linux.intel.com>
[not found] ` <430391F1.9080900@cosmosbay.com>
[not found] ` <20050817211829.GK27628@wotan.suse.de>
[not found] ` <4303AEC4.3060901@cosmosbay.com>
[not found] ` <20050817215357.GU3996@wotan.suse.de>
2005-08-18 0:40 ` [PATCH] struct file cleanup : the very large file_ra_state is now allocated only on demand Eric Dumazet
2005-08-18 1:05 ` Andi Kleen
2005-08-18 2:43 ` David S. Miller
2005-08-18 7:14 ` Eric Dumazet
2005-08-18 7:18 ` David S. Miller [this message]
2005-08-18 2:52 ` Nick Piggin
2005-08-18 2:57 ` Andi Kleen
2005-08-18 3:00 ` Nick Piggin
2005-08-18 1:39 ` Coywolf Qi Hunt
2005-08-18 6:51 ` Eric Dumazet
2005-08-18 9:05 ` [PATCH] Put the very large file_ra_state outside of 'struct file' Eric Dumazet
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