pnfs/flexfiles: retry getting layout segment for reads

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commit eb3fabde15 upstream.

If ff_layout_pg_get_read()'s attempt to get a layout segment results
in -EAGAIN have ff_layout_pg_init_read() retry it after sleeping.

If "softerr" mount is used, use 'io_maxretrans' to limit the number of
attempts to get a layout segment.

This fixes a long-standing issue of O_DIRECT reads failing with
-EAGAIN (11) when using flexfiles Client Side Mirroring (CSM).

Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Mike Snitzer 2025-01-16 20:05:39 -05:00 • committed by Greg Kroah-Hartman

parent 7dc5a84ba5

commit 3996a41b1e

1 changed files with 21 additions and 6 deletions

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fs/nfs/flexfilelayout/flexfilelayout.c

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