Re: [PATCH 0/4] Fix a crash when block device is read and block size is changed at the same time

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

 



Mikulas Patocka <mpatocka@xxxxxxxxxx> writes:

> Hi Jeff
>
> Thanks for testing.
>
> It would be interesting ... what happens if you take the patch 3, leave 
> "struct percpu_rw_semaphore bd_block_size_semaphore" in "struct 
> block_device", but remove any use of the semaphore from fs/block_dev.c? - 
> will the performance be like unpatched kernel or like patch 3? It could be 
> that the change in the alignment affects performance on your CPU too, just 
> differently than on my CPU.

I'll give it a try and report back.

> What is the CPU model that you used for testing?

http://ark.intel.com/products/53570/Intel-Xeon-Processor-E7-2860-%2824M-Cache-2_26-GHz-6_40-GTs-Intel-QPI%29

Cheers,
Jeff
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux