| Hi all,
|
| i've written to the current FAT maintainer (Gordon Chaffee) about this,
| but he's no longer active, so:
|
| While working in the usb-sotrage area (mostly with removeable media, eg.
| CompactFlash in USB-Readers), i've come across a litte odd behaviour:
|
| when calling statfs on a volume that has been removed (without umount)
| fat_statfs() will attempt to read all sectors of the fat table quite a few
| times (depending on the fat type, eg. FAT16 --> 256 times).
|
| eg:
| 1. mount /dev/sda1 /mnt/cf
| 2. remove card
| 3. df
|
| on my system, for a 16 MB CompactFlash formated with FAT-16 this takes 47
| seconds.
|
| Possible solution:
| 1. let default_fat_access return something like -2 on 'can't read' error.
| 2. Abort stafs loop on error.
| 3. return -EIO
|
| This would break mode fat_access calls. I could make a patch, but I don't
| know what's going on with those cvf extensions (which seem to replace
| fat_access). Is dmsdos dead / can we ignore it ?
| Somewhere in the list archives, I found comments about the cvf stuff being
| completely removed ?
Try asking OGAWA Hirofumi (cc-ed). He's the de facto FAT maintainter.
(I asked him to add a patch to MAINTAINTERS...)
-- ~Randy | http://developer.osdl.org/rddunlap/ | http://www.xenotime.net/linux/ | - 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/