cvs commit: src/sys/kern vfs_bio.c vfs_mount.c
Aryeh M. Friedman
aryeh.friedman at gmail.com
Thu Dec 27 10:40:02 PST 2007
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Remko Lodder wrote:
> Warner Losh wrote:
>> imp 2007-12-27 16:38:29 UTC
>> FreeBSD src repository
>> Modified files: sys/kern vfs_bio.c vfs_mount.c Log: A
>> partial solution to some of the 'pull the umass device with a
>> mounted FS' problems. These are more along the lines of
>> 'avoiding an avoidable panic' than a complete solution to
>> removable devices. We now close the barn door after the horse
>> has gotten lose and has been hit by a truck, as it were. The
>> barn no longer catches fire in this case, but the horse is still
>> dead :-).
>> The vfs_bio.c fix causes us not to put a failed write back into
>> the dirty pool if the error returned was ENXIO. In that case,
>> the buffer is treated like any other clean buffer that's being
>> retured. ENXIO means the device isn't there anymore and will
>> never be there again in the future, so retrying is futile.
>> The vfs_mount.c fix treats 'ENXIO' as success for unmounting a
>> file system. If the device is gone, retrying later won't help
>> and we'll never be able to unmount the device.
>> These two are part of a larger patch set submitted by the author.
>> The other patches will be forth coming. I added comments to
>> these two patches.
>> Submitted by: Henrik Gulbrandsen Reviewed by: phk@ PR: usb/46176
>> Revision Changes Path 1.531 +4 -0
>> src/sys/kern/vfs_bio.c 1.269 +7 -2
Can someone give me a quick overview of what a super page is (I assume
it is meant to improve paging performance)
Aryeh M. Friedman
Developer, not business, friendly
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