Hello,

Please, try the attached patches.
The first patch improves responsiveness to vm subsystem
(modified version of ->migratepage() from Ivan Shapovalov).
The second patch performs memory allocation in the critical
place with __GFP_NOFAIL flag.
Let us know about results.

Thanks,
Edward.

On 08/20/2017 07:15 PM, Metztli Information Technology wrote:
> Niltze, Ed-
>
> Although I am using your latest Reiser4 patch for Linux kernel 4.12.x on a test 1.2TB (transparent compression) reiser4 root fs, I have seen
> dmesg generate the following in lesser version patches and in much smaller partitions, i.e., 20Gb -- with transparent compression, too.
>
> Your input would be greatly appreciated:
>
> [ 3449.944653] reiser4[StorageManager(2383)]: lzo1_alloc (/mnt/chiucuetetl/usr/src/linux/fs/reiser4/plugin/compress/compress.c:241)[edward-878]:
>                 WARNING: alloc workspace for lzo1 (tfm action = 1) failed
>
> [ 3449.944674] reiser4[StorageManager(2383)]: lzo1_alloc (/mnt/chiucuetetl/usr/src/linux/fs/reiser4/plugin/compress/compress.c:241)[edward-878]:
>                 WARNING: alloc workspace for lzo1 (tfm action = 1) failed
>
> [ 3449.944694] reiser4[StorageManager(2383)]: lzo1_alloc (/mnt/chiucuetetl/usr/src/linux/fs/reiser4/plugin/compress/compress.c:241)[edward-878]:
>                 WARNING: alloc workspace for lzo1 (tfm action = 1) failed
>
> [ 3449.944715] reiser4[StorageManager(2383)]: lzo1_alloc (/mnt/chiucuetetl/usr/src/linux/fs/reiser4/plugin/compress/compress.c:241)[edward-878]:
>                 WARNING: alloc workspace for lzo1 (tfm action = 1) failed
>
> [snip]
> ( the above replicate for about two(2) thousand lines )
>
> Please note that the error above is not immediate but is triggered possibly by multiple events run simultaneously, i.e.,
>   plugged 1TB USB hard disk with multiple partitions where copy operation to local disk is being run; another copy operation to-from local hard
> disk itself on same filesystem; installing additional packages, building local software, etc.
>
> Subsequently system slows down in latency and fan use increases in all instances.
>
> Thank you in advance for your insight.
>
>
> Best Professional Regards.
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