Messages in this thread | | | From | Bodo Eggert <> | Subject | Re: slow sync of fat 32 hotplugged devices | Date | Fri, 16 Dec 2005 06:48:04 +0100 |
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Patrick Fritzsch <fritzsch@cip.physik.uni-muenchen.de> wrote:
> It seems that the hal daemon mounts a usbstick in fat32 mode, where > default the sync option ist on. Actually this is a nice behaviour, > because a cp to the stick should last so long until the file was > completly written.
[...] > I guess that the kernel checks after every block of the file, which is > written, if the stick has really written it, which leads to such a big > slowdown. There are already lots of comments of this in the web, where > the solution is always to disable the sync mode in the hal daemon device > files.
The situation is worse: It will update the FAT each time a block is written. Therefore the FAT area will wear out very quickly.
> Wouldnt it be a nice behaviour, if you could mount a file in a new sync > mode, where it isnt synchronized during writing a file, only when a > close ioctl command was executed on a filehandle? > sync writing to hotplugged devices would be a lot faster then.
IMO it should sync on committed dentry updates, too. -- Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF verbreiteten Lügen zu sabotieren. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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