Re: bdflush flushing memory mapped pages.

From: Arjan van de Ven (arjanv@redhat.com)
Date: Wed Apr 09 2003 - 04:22:43 EST

Next message: Dave Gilbert (Home): "2.4.20: / corruption on md-raid on large IDE discs"
Previous message: Soeren Sonnenburg: "2.4.21pre6 (__ide_dma_test_irq) called while not waiting"
In reply to: Keith Ansell: "bdflush flushing memory mapped pages."
Next in thread: Alan Cox: "Re: bdflush flushing memory mapped pages."
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On Wed, 2003-04-09 at 21:20, Keith Ansell wrote:
> help
>
> My application uses SHARED memory mapping files for file I/O, and we have
> observed
> that Linux does not flush dirty pages to disk until munmap or msync are
> called.
>
> I would like to know are there any development plans which would address
> this issue or
> if there is a version of bdflush which flushes write required pages (dirty
> pages) to disk?

The linux behavior is perfectly fine and conformant to the posix/sus
specifications, applications that break because of this are defective
and need fixing. This is a performance optimisation that the OS is
perfectly allowed to do.

application/pgp-signature attachment: This is a digitally signed message part

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

Next message: Dave Gilbert (Home): "2.4.20: / corruption on md-raid on large IDE discs"
Previous message: Soeren Sonnenburg: "2.4.21pre6 (__ide_dma_test_irq) called while not waiting"
In reply to: Keith Ansell: "bdflush flushing memory mapped pages."
Next in thread: Alan Cox: "Re: bdflush flushing memory mapped pages."
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Tue Apr 15 2003 - 22:00:18 EST