journal_extend man page on Scientific

journal_extend man page on Scientific

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JOURNAL_EXTEND(9)	   The Linux Journalling API	     JOURNAL_EXTEND(9)

NAME
       journal_extend - extend buffer credits.

SYNOPSIS
       int journal_extend(handle_t * handle, int nblocks);

ARGUMENTS
       handle
	   handle to ´extend´

       nblocks
	   nr blocks to try to extend by.

DESCRIPTION
       Some transactions, such as large extends and truncates, can be done
       atomically all at once or in several stages. The operation requests a
       credit for a number of buffer modications in advance, but can extend
       its credit if it needs more.

       journal_extend tries to give the running handle more buffer credits. It
       does not guarantee that allocation - this is a best-effort only. The
       calling process MUST be able to deal cleanly with a failure to extend
       here.

       Return 0 on success, non-zero on failure.

       return code < 0 implies an error return code > 0 implies normal
       transaction-full status.

AUTHORS
       Roger Gammans <rgammans@computer-surgery.co.uk>
	   Author.

       Stephen Tweedie <sct@redhat.com>
	   Author.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013		     JOURNAL_EXTEND(9)

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