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Revision 16b34aa44b257155d9392a19e08e4ce139bc2789 authored by Ronnie Sahlberg on 08 March 2019, 02:58:21 UTC, committed by Steve French on 15 March 2019, 00:32:35 UTC 
cifs: prevent starvation in wait_for_free_credits for multi-credit requests
 
Reserve the last MAX_COMPOUND credits for any request asking for >1 credit.
This is to prevent future compound requests from becoming starved while waiting
for potentially many requests is there is a large number of concurrent
singe-credit requests.

However, we need to protect from servers that are very slow to hand out
new credits on new sessions so we only do this IFF there are 2*MAX_COMPOUND
(arbitrary) credits already in flight.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
1 parent b227d21
Raw File
bcd.c 
// SPDX-License-Identifier: GPL-2.0
#include <linux/bcd.h>
#include <linux/export.h>

unsigned _bcd2bin(unsigned char val)
{
	return (val & 0x0f) + (val >> 4) * 10;
}
EXPORT_SYMBOL(_bcd2bin);

unsigned char _bin2bcd(unsigned val)
{
	return ((val / 10) << 4) + val % 10;
}
EXPORT_SYMBOL(_bin2bcd);
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