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Date: Tue, 10 Jun 2008 10:49:19 +0200 From: Maxim Shchetynin <maxim@...ux.vnet.ibm.com> To: Matthew Wilcox <matthew@....cx>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: AZFS file system proposal On Mon, 9 Jun 2008 06:55:30 -0600 Matthew Wilcox <matthew@....cx> wrote: > On Mon, Jun 09, 2008 at 10:46:50AM +0200, Maxim Shchetynin wrote: > > +config AZ_FS > > + tristate "AZFS filesystem support" > > + help > > + Non-buffered filesystem for block devices with a gendisk and > > + with direct_access() method in gendisk->fops. > > + AZFS does not buffer outgoing traffic and is doing no read ahead. > > + It supports mount options (given with -o) bs=x,uid=x,gid=x. > > + If block-size (bs) is not specified AZFS uses block-size used > > + by block device. Though mmap() method is available only if > > + block-size equals to or is greater than system page size. > > This is a terrible description. I can't even suggest better wording > because I don't understand it. The correct wording would not mention > gendisks, fops or direct_access(). It would tell the user what they > might use it for. > What do you think about the following - shorter description and a better place for it (moved to "Pseudo filesystems"): --- linux-2.6.26-rc5/fs/Kconfig 2008-06-05 05:10:44.000000000 +0200 +++ linux-2.6.26-rc5-azfs/fs/Kconfig 2008-06-10 10:43:24.326686538 +0200 @@ -1017,6 +1017,19 @@ config HUGETLB_PAGE def_bool HUGETLBFS +config AZ_FS + tristate "AZFS filesystem support" + help + azfs is a file system for I/O attached memory backing. It requires + a block device with direct_access capability, e.g. axonram. + Mounting such device with azfs gives memory mapped access to the + underlying memory to user space. + + To compile this file system support as a module, choose M here: the + module will be called azfs. + + If unsure, say N. + config CONFIGFS_FS tristate "Userspace-driven configuration filesystem" depends on SYSFS -- Mit freundlichen Grüßen / met vriendelijke groeten / avec regards Maxim V. Shchetynin Linux Kernel Entwicklung IBM Deutschland Entwicklung GmbH Linux für Cell, Abteilung 3250 Schönaicher Straße 220 71032 Böblingen Vorsitzender des Aufsichtsrats: Johann Weihen Geschäftsführung: Herbert Kircher Sitz der Gesellschaft: Böblingen Registriergericht: Amtsgericht Stuttgart, HRB 243294 Fahr nur so schnell wie dein Schutzengel fliegen kann! -- 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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