Hi.
It appears to me that a swapfile on an XFS filesystem will not work, at
least some of the time.
mm/page_io:722 uses swapf->i_sb->s_blocksize to determine the number of
blocks required to store a page. This method is also in Software
Suspend's swapfile support. Karol emailed me yesterday saying swapfile
support in Suspend seemed to be broken, and I've tracked it down to the
fact that (at least on a test 192MB XFS partition with a 98MB swapfile
on it), s_blocksize is set to 4096 while the blocksize actually appears
to be 512. The means Suspend only gets 12.5% of the way through writing
the image before finding it has run out of space. I don't know how the
system would cope with the descrepancy.
Kernel is 2.4.25-pre4 by the way.
Regards,
Nigel
--
My work on Software Suspend is graciously brought to you by
LinuxFund.org.
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