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Date: Mon, 3 Sep 2007 14:40:43 +0100 From: Christoph Hellwig <hch@...radead.org> To: Christoph Lameter <clameter@....com> Cc: Christoph Hellwig <hch@...radead.org>, Mingming Cao <cmm@...ibm.com>, linux-fsdevel@...r.kernel.org, adilger@...sterfs.com, sho@...s.nec.co.jp, ext4 development <linux-ext4@...r.kernel.org>, linux-kernel@...r.kernel.org Subject: Re: [RFC 1/2] JBD: slab management support for large block(>8k) On Mon, Sep 03, 2007 at 12:55:04AM -0700, Christoph Lameter wrote: > On Sun, 2 Sep 2007, Christoph Hellwig wrote: > > > > We are doing what you describe right now. So the current code is broken? > > Yes. > > How about getting rid of the slabs there and use kmalloc? Kmalloc in mm > (and therfore hopefully 2.6.24) will convert kmallocs > PAGE_SIZE to page > allocator calls. Not sure what to do about the 1k and 2k requests though. The problem is that we must never use kmalloc pages, so we always need to request a page or more for these. Better to use get_free_page directly, that's how I fixed it in XFS a while ago. - 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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