Re: 2.6.19-rc3: known unfixed regressions (v3)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi Linus,

Linus Torvalds wrote:
Actually, looking closer at the code, the patch seems to add _incorrect_ error handling.

For example, look at bd_claim_by_kobject(): if the "bd_claim()" inside of it succeeds, we used to always return success. Now, we don't necessarily do that: we may have done a _successful_ "bd_claim()" call, but then we return an error because something else failed, and now we're returning with from bd_claim_by_kobject() with the bd_claim() done, but with an error return (so the caller will _not_ call "bd_release()", and the block_device will forever stay exclusive).

No?

You're right.

Now, exactly why acpi stops working as a result, I don't know, but maybe something else tries to get exclusive access to a swap partition, for example, and now fails, causing some acpi sequence to not be set up? Dunno.

So I suspect it should be reverted, but maybe somebody can see exactly what goes wrong here.

Please revert the patch. I'll fix the wrong error handling.

I'm not sure reverting the patch solves the ACPI problem
because Michael's kernel seems not having any user of
bd_claim_by_kobject.

Thanks,
--
Jun'ichi Nomura, NEC Corporation of America
-
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux IBM ACPI]     [Linux Power Management]     [Linux Kernel]     [Linux Laptop]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Video 4 Linux]     [Device Mapper]     [Linux Resources]

  Powered by Linux