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xfs: improve error message when we can't allocate memory for xfs_buf

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If xfs_buf_get_map can't allocate enough memory for the buffer it's
trying to create, it'll cough up an error about not being able to
allocate "pagesn".  That's not particularly helpful (and if we're really
out of memory the message is very spammy) so change the message to tell
us how many pages were actually requested, and ratelimit it too.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2020-02-21 07:40:44 -08:00
parent d0c7feaf87
commit 93baa55af1
1 changed files with 3 additions and 2 deletions
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5
fs/xfs/xfs_buf.c
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@ -727,8 +727,9 @@ found:
if (!bp->b_addr) {
error = _xfs_buf_map_pages(bp, flags);
if (unlikely(error)) {
xfs_warn(target->bt_mount,
"%s: failed to map pagesn", __func__);
xfs_warn_ratelimited(target->bt_mount,
"%s: failed to map %u pages", __func__,
bp->b_page_count);
xfs_buf_relse(bp);
return error;
}