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Date: Sun, 29 Apr 2007 22:58:54 -0700 (PDT) From: Christoph Lameter <clameter@....com> To: Alan Cox <alan@...rguk.ukuu.org.uk> cc: "Robert P. J. Day" <rpjday@...dspring.com>, "Shan, Guo Wen (Gavin)" <gshan@...atel-lucent.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: can a kmalloc be both GFP_ATOMIC and GFP_KERNEL at the same time? On Sat, 28 Apr 2007, Alan Cox wrote: > > > drivers/scsi/aic7xxx_old.c: aic_dev = kmalloc(sizeof(struct aic_dev_data), GFP_ATOMIC | GFP_KERNEL); > > > drivers/message/i2o/device.c: resblk = kmalloc(buflen + 8, GFP_KERNEL | GFP_ATOMIC); > > > > > > clarification? > > > > oh, i'm *aware* of the definitions of those flags, but every single > > source i've ever read has *strongly* suggested that you don't use > > I don't believe either of those is doing what the author intended 8). Well sortof. First of all kmalloc may not even allocate a page to satisfy the request. If it does then we do essentially GFP_KERNEL | __GFP_HIGH meaning a allocation where we can sleep etc but are allowed to dip into the reserves. - 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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