> 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
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.
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