Re: why clear_buffer_uptodate in end_buffer_write_sync on write error?
From: Robert W. Fuller
Date: Sun Jan 02 2005 - 21:26:49 EST
Hmm, ok this makes sense for the sync case, but what about the async
case? Should clear_buffer_uptodate be called in end_buffer_async_write?
How is the error going to be reported to the user, particularly in the
case of a memory mapped file? Shouldn't the system try to write that
page again?
Robert W. Fuller wrote:
I'm trying to understand the file systems. I'm making good progress,
but I don't get this. If the buffer is marked not up to date because
the write failed, won't this cause block_prepare_write to try and read
the buffer using ll_rw_block thereby overwriting the data that couldn't
be written? Is this desirable? Perhaps I'm confused?
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