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    SubjectRe: [PATCH] Allow SysRq emergency sync to thaw frozen filesystems
    On Fri, 2009-01-16 at 10:21 -0600, Dave Kleikamp wrote:
    > On Thu, 2009-01-15 at 21:49 -0600, Eric Sandeen wrote:

    > > oh, hrm. Maybe I didn't think enough about how it's handed off to
    > > pdflush; I could rearrange if that makes sense? Or maybe handing to
    > > pdflush is wrong, it was just so convenient....
    > I don't understand the reason for handing it to pdflush. I would expect
    > thaw to be very fast. Do we expect it to block anywhere, and if so, for
    > very long? Not that I see any problem with it.

    Eric pointed out on irc that this is in interrupt context, so even
    taking a mutex is not allowed. I now agree that handing it to pdflush
    is reasonable.

    David Kleikamp
    IBM Linux Technology Center

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