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SubjectRe: [reiserfs-list] Re: VM brokenness, possibly related to reiserfs
Chris Mason wrote:

>
> On Thursday, February 01, 2001 02:16:43 PM -0200 Rik van Riel <riel@conectiva.com.br> wrote:
>
>> About the system hanging completely, I wonder if it goes
>> away by pressing sysrq-S (sync all disks). If it does,
>> maybe Reiserfs was blocking all the pages in the inactive
>> list from being written because one of the active pages
>> (not a replacement candidate) needed to be written out
>> first? Or does the Reiserfs ->writepage() function handle
>> this?
>

In answer to Rik's question, no, sysrq-S doesn't fix it. The sound of
the disk grind changes momentarily then it resumes.

> In most cases, the reiserfs writepage func is the same as block_write_full_page. The only difference should come when a packed tail has been mmap'd.
>
> Since JOURNAL_MAX_BATCH was at 100, the log should have only pinned 400k. More blocks could be pinned, but kreiserfsd should be in the process of flushing those.
>
> I've been trying out a few things to send memory pressure down to reiserfs, but they have mostly been based on the code to make fs/buffer.c use writepage for flushing. I should have done something simple first, I'll start on that now.
>
> -chris


http://stuph.org/VM/ is back up, no thanks to the network solutions.
The files listed there have all the relevant backtraces.

-d


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